um0722 user manual - bdtic · 2013. 10. 18. · – i²s, right- or left-justified compatible...

August 2009 Doc ID 15867 Rev 1 1/46

UM0722User manual

Getting started with STEVAL-CCA021V1,STM32 performance line USB demonstration kit

1 Introduction

This user manual describes hardware and software of the STMicroelectronics™ STM32™ performance line USB demonstration kit based on the STM32F103 microcontroller and the I2S TS4657 audio digital to analog converter (decoder). The audio output can be implemented either with the TS4962 driven onboard speaker which output is also available on the onboard mono jack connector, or through TS2012 stereo audio amplifier which can drive external speakers. Both audio amplifiers are Class-D. The audio input is available with an onboard microphone which is connected through TS472 microphone preamplifier to the ADC input of the microcontroller. To facilitate the reuse of the boards, the controller and the audio card can be disconnected, and used separately for other purposes.

This demonstration kit primarily offers a USB interface operating either under USB Audio Device Class for audio streaming, or Device Firmware Upgrade class (DFU) for application reprogramming through the USB. All design information are included in the kit and can be reused for a new development. The demonstration kit allows a quick evaluation of STMicroelectronics low-voltage audio components in Human machine interface (HMI) audio input/output, portable audio equipment, and simple PC USB demonstration kit applications.

Figure 1. STM32F103 USB demonstration kit - top view

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Contents UM0722

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Contents

1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3 Boards key features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4 General system description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5 Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.1 System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.2 Package contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.3 Software driver installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

6 Boards layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

6.1 STM32 controller board layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

6.2 TS4657 audio card layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

7 System setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

7.1 Demonstration kit output mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

7.1.1 Onboard speaker configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

7.1.2 External mono speaker or headphone configuration . . . . . . . . . . . . . . . 12

7.1.3 External amplified stereo output configuration . . . . . . . . . . . . . . . . . . . . 13

7.1.4 Lineout output configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

7.2 Microphone record-replay mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

8 Connectors of the STM32 performance line controller board . . . . . . . 15

8.1 I2S audio connector P2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

8.2 JTAG connector CN1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

9 Connectors and functionality of the TS4657 audio card . . . . . . . . . . . 17

9.1 I2S audio connector P1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

9.2 Mono jack connector J4 and the onboard speaker U6 . . . . . . . . . . . . . . . 17

9.3 TS2012 stereo output terminal connectors P2, P3 . . . . . . . . . . . . . . . . . 18

9.4 TS4657 stereo DAC output audio RCA connectors J1, J3 . . . . . . . . . . . . 19

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UM0722 Contents

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9.5 Microphone functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

9.6 TS4657 stereo audio DAC functionality . . . . . . . . . . . . . . . . . . . . . . . . . . 21

9.7 TS4962 mono Class-D power amplifier functionality . . . . . . . . . . . . . . . . 22

9.8 TS2012 stereo Class-D power amplifier functionality . . . . . . . . . . . . . . . . 23

10 LEDs and buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

10.1 LED indicators on the STM32 controller board . . . . . . . . . . . . . . . . . . . . 25

10.2 LED indicators on the TS4657 audio card . . . . . . . . . . . . . . . . . . . . . . . . 25

10.3 B1 button on the STM32 controller board . . . . . . . . . . . . . . . . . . . . . . . . 25

11 Demonstration kit software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

11.1 Design firmware upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

11.2 USB Audio Device Class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

11.3 PC USB demonstration kit and record-replay applications . . . . . . . . . . . 27

11.3.1 PC USB demonstration kit application . . . . . . . . . . . . . . . . . . . . . . . . . . 27

11.3.2 Record-replay application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

11.4 Updating demonstration application in the demonstration kit . . . . . . . . . . 29

12 Test measurement of the audio signal . . . . . . . . . . . . . . . . . . . . . . . . . 30

13 Addendum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Appendix A STM32F103 controller board - BOM . . . . . . . . . . . . . . . . . . . . . . . . . 32

Appendix B STM32F103 controller board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Appendix C TS4657 audio card - artwork prints . . . . . . . . . . . . . . . . . . . . . . . . . 38

Appendix D STM32F103 controller board - schematic . . . . . . . . . . . . . . . . . . . . 40

Appendix E TS4657 audio card - schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

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List of tables UM0722

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List of tables

Table 1. I2S audio connector pins description of the STM32 controller board . . . . . . . . . . . . . . . . . 15Table 2. JTAG connector pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Table 3. I2S audio connector pins description of the TS4657 audio card . . . . . . . . . . . . . . . . . . . . . 17Table 4. Mono jack connector J4 pins description of the TS4657 audio card . . . . . . . . . . . . . . . . . 18Table 5. TS2012 stereo output terminal connectors P2, P3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Table 6. TS4657 stereo DAC output audio RCA connectors J1, J3 . . . . . . . . . . . . . . . . . . . . . . . . . 19Table 7. Bill of material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32Table 8. Docsument revision history. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

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UM0722 List of figures

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List of figures

Figure 1. STM32F103 USB demonstration kit - top view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Figure 2. STM32F103 USB demonstration kit - block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Figure 3. Device manager window - new USB audio device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Figure 4. STM32 controller board layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Figure 5. TS4657 audio card board layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Figure 6. Onboard speaker system setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Figure 7. External mono speaker or headphone system setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Figure 8. External amplified stereo output system setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Figure 9. Lineout output system setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Figure 10. Microphone record-replay mode system setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Figure 11. I2S audio connector of the STM32 controller board - schematic . . . . . . . . . . . . . . . . . . . . 15Figure 12. JTAG connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Figure 13. JTAG connector CN1 - schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Figure 14. I2S audio connector of the TS4657 audio card - schematic . . . . . . . . . . . . . . . . . . . . . . . . 17Figure 15. Mono jack audio connector J4 and the onboard speaker U6 . . . . . . . . . . . . . . . . . . . . . . . 18Figure 16. TS2012 stereo output terminal connectors P2, P3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Figure 17. TS4657 stereo DAC output audio RCA connectors J1, J3 . . . . . . . . . . . . . . . . . . . . . . . . . 20Figure 18. Microphone functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Figure 19. TS4657 stereo audio DAC functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Figure 20. TS4962 mono Class-D amplifier functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Figure 21. TS2012 stereo Class-D amplifier functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Figure 22. Typical I2S waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Figure 23. TS4657 output versus the I2S input (10 kHz signal reconstruction) . . . . . . . . . . . . . . . . . . 30Figure 24. TS4657 output versus the I2S input (10 kHz signal reconstruction) - detail . . . . . . . . . . . . 31Figure 25. Typical output from the Class-D amplifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31Figure 26. STM32F103 controller board - top overlay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36Figure 27. STM32F103 controller board - bottom overlay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36Figure 28. TS4657 audio card - top layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37Figure 29. TS4657 audio card - bottom layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37Figure 30. TS4657 audio card - top overlay. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38Figure 31. TS4657 audio card - bottom overlay. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38Figure 32. TS4657 audio card - top layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39Figure 33. TS4657 audio card - bottom layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39Figure 34. STM32F103 controller board - schematic - part 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40Figure 35. STM32F103 controller board - schematic - part 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41Figure 36. TS4657 audio card - schematic - part 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42Figure 37. TS4657 audio card - schematic - part 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43Figure 38. TS4657 audio card - schematic - part 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

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Description UM0722

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2 Description

The STM32 performance line USB demonstration kit is designed to demonstrate several STMicroelectronics products:

● The TS4657 is a stereo DAC that integrates a high-performance audio line driver capable of generating a 2.2 VRMS output level from a single 3.0 to 5.5 V supply. One single supply is sufficient for the digital and analog parts of the circuit, thus eliminating the need for external regulators. The TS4657 is a low-power consumption device. It features only 22 mW power dissipation at a 3.0 V power supply in full operation. A 16-bit multi-bit sigma delta DAC is used, operating at 256 x Fs (where Fs is the sampling frequency) with oversampling digital interpolation filters. The digital audio data can be 16 to 24-bit long and sample rates from 32 to 48 kHz are supported. The TS4657 is packaged in a small 4 x 4 mm QFN20 package, ideal for portable applications.

● The STM32F103xx performance line family incorporates the high-performance ARM® Cortex™-M3 32-bit RISC core operating at a 72 MHz frequency, high-speed embedded memories (Flash memory up to 128 KB and SRAM up to 20 KB), and an extensive range of enhanced I/Os and peripherals connected to two APB buses. All devices offer two 12-bit ADCs, three general purpose 16-bit timers plus one PWM timer, as well as standard and advanced communication interfaces: up to two I2Cs and SPIs, three USARTs, a USB and a CAN. The STM32F103xx performance line family operates from a 2.0 to 3.6 V power supply. It is available in both the –40 to +85 °C temperature range and the –40 to +105 °C extended temperature range. A comprehensive set of power-saving mode allows designing low-power applications. The complete STM32F103xx performance line family includes devices in 5 different package types: from 36 pins to 100 pins.

● The TS2012 is a fully differential stereo Class-D power amplifier able to drive up to 1.15 W into a 8 Ω load at 5 V per channel. It achieves better efficiency compared to typical Class-AB audio amps. Pop and click reduction circuitry provides low on/off switch noise while allowing the device to start within 8 ms.

● The TS4962 is a differential Class-D BTL power amplifier. It is able to drive up to 2.3 W into a 4 Ω load and 1.4 W into a 8 Ω load at 5 V. It achieves outstanding efficiency (88 % typ.) compared to classical Class-AB audio amps. Pop and click reduction circuitry provides low on/off switch noise while allowing the device to start within 5 ms. A standby function (active low) allows to reduce the current consumption down to 10 nA typical.

● The TS472 is a differential-input microphone preamplifier optimized for high-performance, PDA and notebook audio systems. This device features an adjustable gain from 0dB to 40 dB with excellent power-supply and common-mode rejection ratios. In addition, the TS472 has a very low-noise microphone bias generator of 2 V. It also includes a complete shutdown function, with active low standby mode.

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UM0722 Boards key features

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3 Boards key features

STM32 performance line controller board

● STM32F103 performance line microcontroller

● 16 MHz crystal unit

● USB connector and ESD protection

● Two LEDs driven by the microcontroller

● Push button to control the firmware mode

● Connectors summary

– 20-pin dual line header for connection to the TS4657 audio card

– Full JTAG connector

TS4657 audio card

● TS4657 - single supply stereo digital audio line driver with 2.2 VRMS capless outputs

– 16- to 24-bit audio data format stereo DAC, 32 to 48 kHz sample rate

– I²S, right- or left-justified compatible digital audio interface

● TS2012 - filter-free stereo 2 x 2.8 W Class-D audio power amplifier

– Output available either on the mono jack connector or fed to the onboard speaker

● TS4962 - 2.8 W filter-free mono Class-D audio power amplifier

– Output available either through mono jack connector or to onboard speaker

● TS472 - very low noise microphone preamplifier with 2.0 V bias output and active low standby mode

– Single ended output available for connection to ADC of a microcontroller

● Onboard microphone and small speaker

● Connectors summary

– 20-pin dual line header for connection to the STM32 performance line controller board

– Two RCA connectors available as TS4657 line outputs

– Mono jack connector available as TS4962 amplifier output

– Two terminal connectors available as TS2012 outputs

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General system description UM0722

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4 General system description

The STM32F103 USB demonstration kit consists of two boards. The STM32F103 controller board receives the audio data through USB from PC and transfers them into the I2S data stream in the PCM16 format suitable for the TS4657 audio DAC. In addition, the STM32F103 can act as an interface with a microphone line connected to the microcontroller ADC pin.

The second board performs the audio function, using the TS4657 digital to analog converter (DAC). Its output is passed to TS4962 Class-D mono amplifier that either feeds the onboard speaker or drives the external mono speaker through the onboard mono jack connector. The DAC output is also connected to TS2012 stereo Class-D amplifier which output is available outside the board for external stereo speakers through terminal connectors. The audio input is available through the onboard microphone which output is amplified by TS472 microphone preamplifier. This microphone line is considered to be connected to the ADC input of the microcontroller on the STM32F103 controller board.

Figure 2. STM32F103 USB demonstration kit - block diagram

STM32

TS4657 TS2012

I2S

Digital control

TS472

USB TS4962

AnalogMono jack

for external speaker

On board microphone

Connectors for

external speakers

Stereo lineout

RCA

Onboard speaker

RCA

AM00480

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UM0722 Getting started

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5 Getting started

5.1 System requirementsIn order to use the STM32 performance line USB demonstration kit with the Microsoft® Windows® operating system, a recent version of Windows, such as Windows XP, Windows 98, Windows Millennium or Windows 2000 must be installed on your PC.

The version of the Windows OS installed on your PC may be checked by clicking the “System” icon in the Control Panel.

5.2 Package contentsThe STM32 performance line USB demonstration kit includes the following items:

Hardware content

● One STM32 controller board with USB and I2S audio connector + one TS4657 audio card board.

● One soldered STM32F103RET6 ARM-based 32-bit microcontroller device (LQFP64 package). It embeds Flash memory allowing 10 thousands reprogramming cycles. (The min. value of the endurance = 10 Kcycles). The STM32F103RET6 is delivered already programmed with the demonstration firmware.

Software content

● STM32 Design Firmware Update (DFU) firmware

● STM32 DFU application that offers PC USB demonstration kit functionality

Documentation

● STM32F103, TS4657IQT, TS2012IQT, TS4962IQT, TS472IQT datasheets

● PCB production data

● STM32F103 and audio devices flyers

● This user manual UM0722

5.3 Software driver installationThe following steps are required to install the software driver of the USB Audio Device Class device:

1. Connect the STM32 performance line USB demonstration kit to your PC/laptop USB port and let the Windows recognize the Audio Device Class device

2. There is no need for any particular user action, just follow installation process and acknowledge default Audio Device Class device driver to operating system once requested. At the end of the installation a new Sound controller appears in the Device Manager window as shown in Figure 3.

This new USB audio device becomes the main audio output for time being.

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Getting started UM0722

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Warning: Do not place the STM32 performance line USB demonstration kit speaker close to your ears. It might harm your hearing if the card is set to deliver the maximum output power.

Figure 3. Device manager window - new USB audio device

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UM0722 Boards layout

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6 Boards layout

6.1 STM32 controller board layout

Figure 4. STM32 controller board layout

6.2 TS4657 audio card layout

Figure 5. TS4657 audio card board layout

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System setup UM0722

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7 System setup

STM32 performance line USB demonstration kit can be used in two application software modes together with at least five audio input / output connection schemes. This chapter gives a brief description of all possible audio hardware settings. The present demonstration kit is designed to be operated always with a personal computer and powered via USB peripheral bus.

Warning: Do not attach the external speakers when the STM32 performance line USB demonstration kit is powered on, that is when the card is connected via USB with PC. It is recommended to always unplug the card from your PC before connecting or disconnecting the external speakers. Short-circuiting the power audio amplifier output pins may damage the power audio amplifier output stages.

7.1 Demonstration kit output mode

7.1.1 Onboard speaker configuration

This is the default configuration after the STM32 performance line USB demonstration kit is plugged into the available PC USB port. The green LED LD2 switches on when the demonstration kit is in operating mode. The PC automatically detects the new demonstration kit and all audio outputs are automatically redirected to the new sound device by Windows. For example, play any multimedia content on a media player, and listen to the audio output from the onboard speaker.

Figure 6. Onboard speaker system setup

7.1.2 External mono speaker or headphone configuration

The system setup is the same as for the default onboard speaker mode. Just connect properly the selected external speaker, and follow the instructions given in Section 9.7 LD2 is switched on when the demonstration kit operates in this mode.

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UM0722 System setup

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Figure 7. External mono speaker or headphone system setup

7.1.3 External amplified stereo output configuration

To change the audio output from the default onboard speaker to the TS2012 power output, briefly press the B1 button on the controller board. In this mode the red LD1 and the green LD2 are both on. By pressing again the B1 button you can get back to the default onboard speaker mode. Please read Section 9.8 for further information about the best external speaker configuration and limitations of the demonstration kit.

Figure 8. External amplified stereo output system setup

7.1.4 Lineout output configuration

Whatever the firmware application mode, the user can always use lineout RCA stereo interface to obtain standardized audio signal that can be further processed by an external audio equipment.

Figure 9. Lineout output system setup

7.2 Microphone record-replay modeThe onboard microphone can be used only in record-replay mode. To change the operating mode from PC USB demonstration kit to record-replay mode, press B1 for approximately 1 s.

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System setup UM0722

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In this mode the STM32 performance line USB demonstration kit records 5 s long audio sample and than plays it back through any mean (speaker) presented in the above chapter. In this mode, LD2 blinks at a fast rate when the demonstration kit is recording, and at a slower rate when the acquired record is being played back. The red LED LD1 functionality does not change. When LD1 is off the onboard speaker is used for playback, when LD1 is on the external stereo speakers are used.

Figure 10. Microphone record-replay mode system setup

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UM0722 Connectors of the STM32 performance line controller board

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8 Connectors of the STM32 performance line controller board

8.1 I2S audio connector P2The P2 connector is used to interconnect the STM32F103 controller board and the TS4657 audio card. This connector is functionally compatible with the P1 connector described in Section 9.1.

Figure 11. I2S audio connector of the STM32 controller board - schematic

8.2 JTAG connector CN1The 20-pin connector (CN1) provides the JTAG interface as shown in Figure 12. This interface is primarily used to communicate with a PC using suitable USB/JTAG converter box such as J-Link from IAR Systems™ or RLink from Raisonance, etc. There exists a wide

Table 1. I2S audio connector pins description of the STM32 controller board

Pin Signal Pin Signal Pin Signal Pin Signal

1 GND 6 PA0 pin of the MCU 11PC3 pin of the MCU

16PB7 pin of the MCU (I2C1_SDA funct. not used)

2 +5V0 from USB 7A3V3 - +3V3 supply voltage for analog domain

12I2S2_SD, PB15 pin of the MCU

17Standby for TS4962 (onboard speaker and mono jack)

3PA3 pin of the MCU

8I2S2_WS, PB12 pin of the MCU

13PC2 pin of the MCU

18 PB6 pin of the MCU (I2C1_SCL funct. not used)

4PA2 pin of the MCU

9VSSA ground for analog domain

14I2S2_MCK, PC6 pin of the MCU

19 GND

5PA1 pin of the MCU (ADC)

10I2S2_CK, PB13 pin of the MCU

15PC1 pin of the MCU

20 +3V3

1 23 45 67 89 1011 1213 1415 1617 1819 20

P2

Header 10 x 2 S

PC0PC1PC2PC3

PA0PA1PA2PA3

I2S2_MCK

USB 5 V

3.3 V

A 3.3 V

I2C1_SCLI2C1_SDA

I2S2_WSI2S2_CKI2S2_SD

VSSA

AM00481

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Connectors of the STM32 performance line controller board UM0722

16/46 Doc ID 15867 Rev 1

choice of development tools on the market supporting microcontroller Flash memory programming and application debugging.

Figure 12. JTAG connector

Figure 13. JTAG connector CN1 - schematic

Table 2. JTAG connector pins description


1 3V3 DC 6 GND 11RTCK Connected to GND by R1 (10 kΩ)

16 GND

2 3V3 DC 7 JTMS 12 GND 17DBGRQ Connected to GND by R2 (10 kΩ)

3 JTRST 8 GND 13 JTDO 18 GND

4 GND 9 JTCK 14 GND 19DBGACK Connected to GND by R14 (10 kΩ)

5 JTDI 10 GND 15 NRST 20 GND

1

2

3 5 7 9

4 6 8 10

11 13 15 17 19

12 14 16 18 20

AM00262

Internal pull-up

Internal pull-up

Internal pull-up

Internal pull-down

1234567891011121314151617181920

CN1JTAG 3.3 V

R2 10 KΩ

R14 10 KΩ

R1

10 KΩ

RTCK

DBGRQ

DBGACK

JTRST

JTDI

JTMS

JTCK

JTDO

NRST

AM00482

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UM0722 Connectors and functionality of the TS4657 audio card

Doc ID 15867 Rev 1 17/46

9 Connectors and functionality of the TS4657 audio card

9.1 I2S audio connector P1The P1 connector is used to interconnect the STM32F103 controller board and the TS4657 audio card. This connector is functionally compatible with the P2 connector described in Section 8.1.

Figure 14. I2S audio connector of the TS4657 audio card - schematic

9.2 Mono jack connector J4 and the onboard speaker U6The mono jack audio connector J4 is connected to the output of the TS4962 Class-D mono audio amplifier U3. The amplifier drives either the onboard speaker or the J4 mono jack

Table 3. I2S audio connector pins description of the TS4657 audio card


1 GND 6G1 Gain select for TS2012

11Right channel mute for TS2012

16Data format selection FMT2 for TS4657

2 +5V0 7

VCCA +3.3 V supply voltage for microphone domain

12TS4657 SDAT I2S signal

17Standby for TS4962 (onboard speaker and mono jack)

3Microphone shutdown

8TS4657 LRCLK I2S signal

13Left channel mute for TS2012

18Data format selection FMT1 for TS4657

4G0 gain select for TS2012

9GNDA ground for microphone domain

14TS4657 MCLK I2S signal (master clock)

19 GND

5Analog output from microphone preamplifier

10TS4657 BCLK I2S signal

15Standby for TS4657

20 NC

5 V

DAC_SDATDAC_BCLK

DAC_MCLKDAC_FMT2DAC_FMT1

DAC_LRCLK

STBY_RSTBY_L

G0G1

SPK_STBY

MICRO_OUTMICRO_SHDN

DAC_STBY

GND

1 23 45 67 89 1011 1213 1415 1617 1819 20

P1

VCCA

GND

GNDA

AM00483

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Connectors and functionality of the TS4657 audio card UM0722

18/46 Doc ID 15867 Rev 1

connector if an external speaker is connected. The output is never available to J4 and U6 at the same time because the mono jack connector J4 has the pin disconnection capability.

l

Figure 15. Mono jack audio connector J4 and the onboard speaker U6

9.3 TS2012 stereo output terminal connectors P2, P3The TS2012 stereo Class-D amplifier output is available outside the board through the onboard terminal connectors P2 and P3.

Table 4. Mono jack connector J4 pins description of the TS4657 audio card

Pin Signal

1 OUT– line of the TS4962 mono amplifier

2 OUT+ line of the TS4962 mono amplifier (present if the external speaker is connected)

3OUT+ line of the TS4962 amplifier connected to the pin 2 of the onboard speaker U6 when the external speaker is not connected.

2 1

KSSG1708

U6

Speaker

OUTPUT

8

5

6

Oscillator

PWM

1

4

3

IN–

IN+

STBYGNDA

7

VCCA

HBRIDGE

Internalbias

OUT+

OUT–

300 KΩ

150 KΩ

150 KΩ

2

NC

9

E-PAD

ST: TS4962IQT

U3

Lumberg 1503 06

J4

Mono jack

100 pFC32

100 pFC33

GND

GND

L5

BLM18EG221SN1

L6

BLM18EG221SN1

AM00484

Table 5. TS2012 stereo output terminal connectors P2, P3

Connector P2 Connector P3

Pin Signal Pin Signal

1 LOUT+ 1 ROUT–

2 LOUT– 2 ROUT+

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Doc ID 15867 Rev 1 19/46

Figure 16. TS2012 stereo output terminal connectors P2, P3

9.4 TS4657 stereo DAC output audio RCA connectors J1, J3The TS4657 stereo DAC audio output is available as lineout signal through the onboard RCA connectors J1, J3.

Gain

select

Gain

select

Standby

control

19

20

15

1

17

16

7

8

11

14

5

2

9 3

418 12

PWMH

bridge

PWMH

bridge

Oscillator

13

RIN +

RIN –

LIN–

LIN +

G0

G1

STBY L

STBY R

AVCC

AGND PGND PGND

LOUT+

LOUT–

PVCC

ROUT+

ROUT–

21

E-PAD

ST: TS2012IQTU2

Externalspeakers

12

Terminal block

P2

12

Terminal block

P3

L1

BLM18EG221SN1

100pFC9

100 pFC8

100 pFC30

100 pFC31

GND

GND

GND

L2

BLM18EG221SN1

L3

BLM18EG221SN1

BLM18EG221SN1

L4

AM00485

PVCC

Table 6. TS4657 stereo DAC output audio RCA connectors J1, J3

Connector J1 Connector J3

Pin Signal Pin Signal

1 LOUT 1 ROUT

2 GND 2 GND

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20/46 Doc ID 15867 Rev 1

Figure 17. TS4657 stereo DAC output audio RCA connectors J1, J3

9.5 Microphone functionalityAn onboard microphone is available on the TS4657 audio card. The microphone is connected to the microphone preamplifier TS472, which operates in single-ended output configuration. The preamplifier output is available on the I2S audio connector P1 and is connected also to the ADC input pin of the STM32 MCU on the controller board.

The microphone unit U5 is supplied from the TS472 preamplifier 2.0 V bias pin. R11, R12 (1 KΩ) resistors are polarizing resistors for biasing of the microphone. C19 and C20 are input coupling capacitors that block the DC voltage at the amplifier input pins and their value determines also the cut-off of the low input frequencies. C18 and C23 are low pass filter capacitors which allow to cut-off the high frequencies (100 pF ~ 20 kHz). C28 is assembled with 0Ω resistor in order to have DC coupling between the preamplifier and the STM32 microcontroller. For AC coupling the C28 value determines also the cut-off of the low output frequencies. The preamplifier gain can be changed by different values of the R17 resistor (see TS472 datasheet on www.st.com). In this configuration the gain is fixed to 40 dB. R3 represents the input impedance of the following stage and is also used to charge the output capacitor C28. R3 is assembled in the default configuration but can be safely removed. R15 is not necessary in case the standby pin connection is correctly handled on the side of the microcontroller. TS472 has a weak pull-down resistor already embedded. If there is no connection on the standby pin to the microcontroller, the preamplifier is in the standby mode. The amplifier is powered from +3.3 V coming from the controller board.

RCA WBTOR 1J1

RCA WBTOR 1J3

1 15

DAC

DAC11

12

LDO

LDO

NCP

PCP

1413

Control interface

Digitalaudio

interface

Digitalfilters

18

20 2

7

8

6

5

4

3

19

9

MCLK

BCLK

FMT1

FMT2

SDAT

LRCLK

STDBY

17

GNDDGNDD

GNDA

10

GNDAGNDA

16

VCCA VCCD

VREGA

VREGD

21

E-PAD

ROUT

LOUT

U1

820 Ω

R4

820 Ω

R5

2.2 nFC10

2.2 nFC14

GND

GND

GND

GND

AM00486

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Doc ID 15867 Rev 1 21/46

Figure 18. Microphone functionality

9.6 TS4657 stereo audio DAC functionalityThe TS4657 is a stereo digital to analog converter. It is a 16-bit multi-bit sigma delta DAC operating at 256 x audio sample rate with over sampling digital interpolation filters. The digital audio data can be 16 to 24 bit long and sample rates from 32 to 48 kHz are supported.

The digital I2S interface has four lines: LRCLK (left - right channel selection), SDAT (audio data), BCLK (bit clock) and MCLK (master clock - over sampling clock). The selection of the data format can be performed through two pins (FMT1, FMT2). The supported data formats are:

● Right-justified, 16-bit data, Data valid on rising edge of BCLK

● Right-justified, 24-bit data, Data valid on rising edge of BCLK

● Left-justified, 16-bit up to 24-bit data, Data valid on rising edge of BCLK

● I²S, 16-bit up to 24-bit data, Data valid on rising edge of BCLK

The standby mode can be entered by driving the standby pin low. The pin features internal weak pull down resistor. For practical reason there is also an external pull-down resistor R20 which is helpful when utilizing the amplifier with a microcontroller. The same is valid for the format pins (FMT1, FMT2) and pull down resistors R7 and R8. The RC passives R4, R5, C10 and C14 are low pass filter network. The output is referenced to ground. The lineout RCA connectors J1, J3 are available on the board for both audio channels. The DAC is powered from +5 V coming from the controller board. One single supply is sufficient for the digital and analog parts of the circuit, thus eliminating the need for external regulators.

12

KEEG1542PBL

U5MICRO_OUT

Microphone

1 KΩR11

1 KΩR12

10 KΩR15

100 nFC17

100 nF

C19

100 nF

C20

100 pF

C18

100 pF

C23

MICRO_SHDN

VCCA

GNDA

GNDA

GNDA

16

17

20

Bias

G

21

5

8

IN–

IN+

GND

15

C1 OUT+

OUT–

4

14

C2

Bias2.0 V

VCC

STBY

10

9

2

22

GND

BYPS

GAIN

ST: TS472IQT

U4

VCCA

GNDA

C271 µF

GNDA

0 Ω / 22 nFC28: assembly 0R resistor for DC coupling

C28

C291 µF

GNDA

100 KΩR3

GNDA

Microphone preamplifier

68 ΩR17

GNDA

AM00487

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22/46 Doc ID 15867 Rev 1

Figure 19. TS4657 stereo audio DAC functionality

9.7 TS4962 mono Class-D power amplifier functionalityThe TS4962 is a differential Class-D power amplifier. It is able to drive up to 1.4 W into a 8 Ω load at 5 V. The gain of the device can be controlled via two external gain-setting resistors R14 and R16. The amplifier is configured in single ended input configuration and signaled from the left channel of the TS4657 audio DAC. A standby function (active low) allows switching the amplifier off. As in previous cases there is an internal weak pull down resistor on this standby pin and an external 10 KΩ (R13) resistor connected to the GND which is useful when utilizing the amplifier with a microcontroller. L5, L6, C32, C33 filters increase the EMI when an external speaker is connected through long cables. The amplifier is powered from +5 V coming from the controller board.

RCA WBTOR 1J1

RCA WBTOR 1J3

1 15

DAC

DAC11

12

LDO

LDO

NCP

PCP

1413

Control interface

Digitalaudio

interface

Digitalfilters

18

20 2

7

8

6

5

4

3

19

9

MCLK

BCLK

FMT1

FMT2

SDAT

LRCLK

STDBY

17

GNDDGNDD

GNDA

10

GNDAGNDA

16

VCCA VCCDVREGA

VREGD

21

E-PAD

ROUT

LOUT

U1

820 Ω

R4

820 Ω

R5

2.2 nFC10

2.2 nFC14

1 µF

C1

1 µF

C2

1 µF

C3

1 µF

C4

DAC

GND

GND

GND

GND

GND

GNDGNDGND

5 V 5 V

DAC_STBY

DAC_SDAT

DAC_BCLK

DAC_MCLK

DAC_FMT2

DAC_FMT1

10 KΩR7

10 KΩR8

GND GND

DAC_LRCLK

10 KΩ

R20

GNDAM00488

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Doc ID 15867 Rev 1 23/46

Figure 20. TS4962 mono Class-D amplifier functionality

Warning: The maximum output power of the TS4962 mono amplifier is 2.2 W at 5 V into 4 Ω speaker and 1.4 W at 5 V into 8 Ω speaker. Please take into consideration the maximum current of the USB port which is typically 500 mA (2.5 W). When the demonstration kit sinks more current from the USB port, it is automatically disconnected from the PC. If this happens just unplug and plug again your demonstration kit.

9.8 TS2012 stereo Class-D power amplifier functionalityThe TS2012 stereo audio Class-D amplifier is connected to the output of the TS4657 audio DAC. The TS2012 input is configured in the single-ended configuration. The amplifier is able to drive up to 1.35 W into a 8 Ω load at 5 V per channel. The device has four different gain settings utilizing two discrete pins: G0 and G1. These pins are controlled by STM32 MCU in the firmware. The gain is set to the minimal value by default thanks to the internal weak pull down resistors. There are also two external pull down resistors R1, R2 which are useful when utilizing the amplifier with a microcontroller. Two standby pins (active low) allow each channel to be switched off independently (internal weak pull down resistors together with external R9 and R10 are present). L1, L2, L3, L4, C8, C9, C30, C31 increase the EMI when the external speakers are connected through long cables. The amplifier is powered from +5 V supplied by from the controller board.

2 1

KSSG1708U6

Speaker

150 kΩ

R16

100 nF

C22150 kΩ

R14

100 nF

C21

5 V

SPK_STBY

C24

1 µF

5 V

100 nF

C25

OUTPUT

8

5

6

Oscillator

PWM

1

4

3

IN–

IN+

STBY GNDA

7

VCCA

HBRIDGE

Internalbias

OUT+

OUT–

300 KΩ

150 KΩ

150 KΩ

2

NC

9

E-PAD

ST: TS4962IQT

U3

10 KΩR13

GND

GND

GND

GND GND

Lumberg 1503 06

J4

Mono jack

100 pFC32

100 pFC33

GND

GND

L5

BLM18EG221SN1

L6

BLM18EG221SN1

Mono Class-D amplifier

Input from the TS4657left channel

AM00489

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24/46 Doc ID 15867 Rev 1

Figure 21. TS2012 stereo Class-D amplifier functionality

Warning: The maximum output power per channel of the TS2012 stereo amplifier is 1.35 W at 5 V into 8 Ω speaker and 2.2 W at 5 V per channel into 4 Ω speaker. Please take into consideration the maximum current of the USB port which is typically 500 mA (2.5 W). When the demonstration kit sinks more current from the USB port, it is automatically disconnected from the PC. If this happens just unplug and plug again your demonstration kit.

Gainselect

Gainselect

Standbycontrol

1920

15

1

17

16

7

8

11

14

5

2

9 3

418 12

PWM Hbridge

PWM Hbridge

Oscillator

13

RIN +RIN –

LIN –

LIN +

G0

G1

STBY L

STBY R

AV

AGNDPGND

PGND

LOUT+

LOUT–

CC PVCC

ROUT+

ROUT–

21

E-PAD

ST: TS2012IQTU2

5 V 5 V5 V

C6

1 µF

5 V

STBY_R

STBY_L

G0

G1

ExternalChannel standby

220 nF

C11

220 nF

C12

220 nF

C13

220 nF

C15

100 nF

C7

GND GND

GND GND GND

GND

GND

10 KΩR9

10 KΩR10

GND GNDspeakers

10 KΩR2

10 KΩR1

GNDGND Gain control

C5

1 µF

12

Terminal block

P2

12

Terminal block

P3

L1

BLM18EG221SN1

100 pFC9

100 pFC8

100 pFC30

100 pFC31

GND

GND

GND

L2

BLM18EG221SN1

L3

BLM18EG221SN1

BLM18EG221SN1

L4

Stereo Class-D amplifier

Input from TS4657

AM00490

PVCC

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UM0722 LEDs and buttons

Doc ID 15867 Rev 1 25/46

10 LEDs and buttons

10.1 LED indicators on the STM32 controller boardThe green LED (LD2) indicates that the demonstration kit is in operating mode. When it is switched on continuously, the PC USB demonstration kit is active; when it flashes, the card operates in the record-replay. The red LED (LD1) indicates the selected audio output. LD1 switched on continuously indicates that the TS2012 power output is used. By default, LD1 is switched off and the onboard speaker is selected.

10.2 LED indicators on the TS4657 audio cardThe TS4657 audio card board features one green LED (LED1). It indicates that the +5 V supply voltage is present on pin 2 of the I2S audio connector P1.

10.3 B1 button on the STM32 controller boardB1 button is used to switch between audio outputs and also between demonstration kit operating modes. To switch from onboard speaker to TS2012 power output, briefly press B1. To change the operating mode from PC USB demonstration kit to record-replay, press B1 for approximately 1s.

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Demonstration kit software UM0722

26/46 Doc ID 15867 Rev 1

11 Demonstration kit software

This section presents the main ready-to-use software techniques that are implemented on the STM32 performance line USB demonstration kit.

11.1 Design firmware upgradeThis paragraph describes the implementation of a device firmware upgrade (DFU) capability in the STM32F103xx microcontroller. It follows the DFU class specification defined by the USB Implementers Forum for reprogramming an application through USB. The DFU principle is particularly well suited for the USB applications that need to be reprogrammed in the field: The same USB connector can be used for both the standard operating mode and the reprogramming process.

This operation is made possible by the IAP capability featured by most of the STMicroelectronics USB Flash microcontrollers, which allows a Flash MCU to be reprogrammed by any communication channel.

The DFU process, like any other IAP process, is based on the execution of firmware located in one small part of the Flash memory. This firmware manages the erase and program of the others Flash memory areas, depending on the device features:

Main program/Code Flash, data Flash/EEPROM, or any other memory connected to the microcontroller including serial I2C or SPI Flash memories).

The STM32 performance line USB demonstration kit features DFU capability used to program the internal Flash memory.

Refer to the UM0412, Getting started with DfuSe USB device firmware upgrade STMicroelectronics extension (available online from: www.st.com/mcu), for more details on the driver installation and PC user interface.

11.2 USB Audio Device ClassAn audio device, as defined by the Universal Serial Bus Class Definition for audio devices specification, is a device or a function embedded in composite devices that are used to manipulate audio, voice, and sound-related functionality. This includes both audio data (analog and digital) and the functionality that is used to directly control the audio environment, such as volume and tone control.

All audio devices are grouped, from the USB-FS-device point of view, in the audio interface class. This class is divided into several subclasses. The Universal Serial Bus Class Definition for audio devices specification details the three following subclasses:

● AudioControl Interface subclass (AC): each audio function has a single AudioControl interface. The AC interface is used to control the functional behavior of a particular audio function. To achieve this functionality, this interface can use the following endpoints:

– A control endpoint (endpoint 0) for manipulating unit and terminal settings and retrieving the state of the audio function using class-specific requests.

– An interrupt endpoint for status returns. This endpoint is optional. The AudioControl interface is the single entry point to access the internals of the audio

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UM0722 Demonstration kit software

Doc ID 15867 Rev 1 27/46

function. All requests that are concerned with the manipulation of certain audio controls within the audio function's units or terminals must be directed to the AudioControl interface of the audio function. Likewise, all descriptors related to the internals of the audio function are part of the class-specific AudioControl interface descriptor.

● AudioStreaming Interface Subclass (AS): AudioStreaming interfaces are used to interchange digital audio data streams between the host and the audio function. They are optional. An audio function can have zero or more AudioStreaming interfaces associated with it, each possibly carrying data of a different nature and format. Each AudioStreaming interface can have at most one isochronous data endpoint.

● MIDIStreaming Interface Subclass (MIDIS): MIDIStreaming interfaces are used to transport MIDI data streams into and out of the audio function. To be able to manipulate the physical properties of an audio function, its functionality must be divided into addressable entities. Two types of such generic entities are identified and are called units and terminals. The Universal Serial Bus Class Definition for audio devices specification defines seven types of standard units and terminals that are considered adequate to represent most audio functions. These are:

– Input terminal

– Output terminal

– Mixer unit

– Selector unit

– Feature unit

– Processing unit

– Extension unit

For more information about the audio class characteristics and requirements please refer to the Universal Serial Bus Device Class Definition for audio devices specification provided by the usb.org website.

11.3 PC USB demonstration kit and record-replay applicationsIn order to demonstrate all capabilities of the TS4657 audio card is the delivered user application structured into two operation modes: PC USB demonstration kit and record-replay.

11.3.1 PC USB demonstration kit application

This part of the demonstration firmware gives examples of how to use the STM32F10xxx USB-FS-device peripheral to communicate with the PC host in the isochronous transfer mode. The code provides a demonstration of the correct method for configuring an isochronous endpoint, receiving or transmitting data from/to the host and also shows how to use the data in a real-time application.

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Demonstration kit software UM0722

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General characteristics

● USB-FS-device characteristics:

– Endpoint 0: used to enumerate the device and to respond to class-specific requests. The maximum packet size of this endpoint is 64 bytes.

– Endpoint 1 (OUT): used to receive the audio stream from the PC host with a maximum packet size up to 192 bytes.

● Audio characteristics:

– Audio data format: type I / PCM format / stereo.

– Audio data resolution: 16 bits.

– Sample frequency: 48 kHz.

● I2S characteristics:

– Channel frequency (also called LEFT/RIGHT clock) is 48 kHz

– MCLK, the external master clock is 12.288 MHz

– Packet frame is fixed to 16-bit

– Data format is LSB-justified standard (Right-Justified)

The aim of the PC demonstration kit application mode is to store the data (audio Stream) received from the host PC in a specific buffer called Stream_Buffer and to use the I2S peripheral to play it through external DAC afterwards.

As detailed before, the STM32F10xxx manages the isochronous data transfer using the double buffer mode. So to copy the received data from the PMA to the Stream_Buff (using DMA transfer), the swapping between the two PMA buffers (ENDP1_BUF0Addr and ENDP1_BUF1Addr) has to be managed. Swapping access to the PMA is managed according to the buffer usage between the USB-FS-device IP and the firmware. This operation is provided by the EP1_OUT_Callback () function (usb_endp.c file). After the end of the copy process, global variables called B0_Ready or B1_Ready are set.

To play back the audio samples received from the host is the I2S audio peripheral used. The Samples variable controls the streaming flow to synchronize the data from the USB-FS-device with the Stream buffer used by the I2S peripheral.

For further details on usage of USB-FS-device firmware library for Audio Device Class purposes, please refer to UM0424, STM32F10xxx USB-FS-device development kit available online from www.st.com.

11.3.2 Record-replay application

In the second mode of operation has the demonstration application task to capture vicinity sound from embedded microphone, process simple normalization of the signal, store acquired waveform into buffer in RAM (Record_Buff[]) in PCM16 format and finally play this sample back through the same I2S mechanism like in previous application mode. This procedure is performed in a infinite loop till another mode is set by button press.

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UM0722 Demonstration kit software

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11.4 Updating demonstration application in the demonstration kitFor the STM32 the DFU mode is entered after an MCU reset if:

● The DFU mode is forced by the user: the user presses the key push-button during a reset (while he is attaching the evaluation dongle to the USB).

● There is no correct code available in the applicative area: before jumping to the applicative code, the DFU code tests if there is a correct top-of-stack address in the first address in the applicative area of the internal Flash memory (for the STM32F10xxx the first applicative address is 0x0800 3000). This is done by reading the value of the first applicative address and verifying if the MSB half-word is equal to 0x2000 (base address of the RAM area in the STM32F10xxx).

Once the device is in the DFU mode, you can simply update main application with support of tools coming from STM in DfuSe package. For further information, please refer to UM0412 “Getting started with DfuSe USB device firmware upgrade STMicroelectronics extension” user manual, available online from: www.st.com/mcu.

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Test measurement of the audio signal UM0722

30/46 Doc ID 15867 Rev 1

12 Test measurement of the audio signal

Figure 22. Typical I2S waveform

Figure 23. TS4657 output versus the I2S input (10 kHz signal reconstruction)

MSB LSB MSB

CK

WS

SD

Channel leftChannel right

16-bit

Transmission Reception

ai17174

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UM0722 Test measurement of the audio signal

Doc ID 15867 Rev 1 31/46

Figure 24. TS4657 output versus the I2S input (10 kHz signal reconstruction) - detail

Figure 25. Typical output from the Class-D amplifiers

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Addendum UM0722

32/46 Doc ID 15867 Rev 1

13 Addendum

Appendix A STM32F103 controller board - BOM

Table 7. Bill of material

Description Comment Designator Footprint Qty Supplier nameSupplier order

codeNote

Button DT2112C B1 Button_DT2112C 1 GM Electronic® 630-121

Polarized capacitor

4.7 µF C1 3528_AB 1 GM Electronic 907-125Do not populate

Polarized capacitor

4.7 µF C5 3528_AB 1 GM Electronic 907-125

Capacitor 1 µF C2, C3 C1206 2 GM Electronic 905-152

Capacitor 10 nF C4 0603 1 GM Electronic 972-014

Capacitor 4.7 nF C6 0603 1 GM Electronic 972-067

Capacitor 100 nF

C7, C9, C11, C12, C13, C14, C15

0603 7 GM Electronic 972-012

Capacitor 100 nF C16 0603 1 GM Electronic 972-012Do not populate

Capacitor 33 pF C8, C10 0603 2 GM Electronic 972-019

JTAG header, side

mountingMLW20G CN1 HDR2X10 S 1 GM Electronic 800-036

USB Connector

USB1X90A PCB

CN2USB_1X90A_PCB4_MV

1 GM Electronic 832-139

BLM18EG221SN1

Inductor L1 0603 1Farnell (Murata Manufacturing Co.,Ltd.)

1515716

LED 0805 RED 45/130°

GME 960-024 LD1 D0805B 1 GM Electronic 960-024

LED 0805 GREEN 35/130°

GME 960-023 LD2 D0805B 1 GM Electronic 960-023

Header, 10-pin, dual

row, side mounting

BL220G P2 HDR2X10 S 1 GM Electronic 832-070

Resistor 10 KΩR1, R2, R6, R9, R10, R14

0603 6 GM Electronic 901-399

www.BDTIC.com/ST

UM0722 STM32F103 controller board - BOM

Doc ID 15867 Rev 1 33/46

Resistor 1.5 kΩ R3 0603 1 GM Electronic 901-504

Resistor 4.7 Ω R4, R5 0603 2 GM Electronic 901-648

Resistor 1 MΩ R7 0603 1 GM Electronic 901-445

Resistor 0 Ω R8 0603 1 GM Electronic 901-396



STM32 ARM-based 32-bit MCU with 512 KB Flash, 64-pin

LQFP

STM32F103RET6

U1 LQFP64_N 1 STMicroelectronics STM32F103RET6

Stabilizator LD3985XX33 U2 SOT23-5L 1 STMicroelectronics LD3985M33

64 Mbit, low voltage,

Serial Flash memory

M25P64-VME6G

U3 VDFPN8(8*6) 1 STMicroelectronics M25P64-VME6GDo not populate

Very low capacitance

ESD protection

USBLC6-2P6 U4 SOT-666 1 STMicroelectronics USBLC6-2P6

CrystalTSX-3225 /

16MHzX1

TSX-3225_FA-238

1 EPSONTSX-3225 / X1E000021011401

Capacitor 1 µF

C1, C2, C3, C4, C5, C6, C24, C27, C29

[0603] 9 Farnell (Kemet) 9227776

Capacitor 100 nF

C7, C16, C17, C19, C20, C21, C22, C25, C34

[0603] 9 GM Electronic 972-012

Capacitor 100 pF

C8, C9, C18, C23, C30, C31, C32, C33


Capacitor 2.2 nF C10, C14 [0603] 2 GM Electronic 972-060

Capacitor 220 nFC11, C12, C13, C15


Polarized capacitor (surface mount)

10 µF/16VC26, C35, C36

C3225[1210] 3 GM Electronic 907-112

Table 7. Bill of material (continued)


codeNote

www.BDTIC.com/ST

STM32F103 controller board - BOM UM0722

34/46 Doc ID 15867 Rev 1

Capacitor 0 Ω /22 nF C28 [0603] 1 GM Electronic 901-396

Typical red, green, yellow,

amber GaAs LED

LED_GREEN_0805

LED12012[0805]_TO_DIODE_wave

1 GM Electronic 960-023

RCA phono jack, right

angle, thru-hole, snap-in

RCA WBTOR 1 J1, J3 RCA/4.5-H2 2 Farnell (Lumberg) 1200146

Socket, 3.5 mm jack,

mono

Lumberg 1503 06

J4 JACK/6-V3A 1 Farnell (Lumberg) 1243243

InductorBLM18EG221S

N1L1, L2, L3, L4, L5, L6

1608[0603] 6 Farnell (Murata) 1515716

Header, 10-pin, dual

row, side mounting

Header 2 x 10 pin,

S2G20P1 HDR2X10 S 1 GM Electronic 832-023

Header, 2-pin,

terminal block, PCB, 2.54 mm,

2-way

Terminal block P2, P3 MPT 0,5/ 2-2,54 2Farnell (PHOENIX CONTACT)

3041359

Resistor 10 KΩ

R1, R2, R7, R8, R9, R10, R13, R15, R20


Resistor 100 KΩ R3 [0603] 1 GM Electronic 901-529

Resistor 820 Ω R4, R5 [0603] 2 GM Electronic 901-500

Resistor 680 Ω R6 [0603] 1 GM Electronic 901-498

Resistor 1 KΩ R11, R12 [0603] 2 GM Electronic 901-502

Resistor 150 kΩ R14, R16 [0603] 2 GM Electronic 901-633

Resistor 68 Ω R17 [0603] 1 GM Electronic 901-408

Single supply stereo digital

audio line driver

ST: TS4657IQT U1 QFN20_TS4657 1 STMicroelectronics TS4657IQT



codeNote

www.BDTIC.com/ST

UM0722 STM32F103 controller board - BOM

Doc ID 15867 Rev 1 35/46

Filter-free stereo

2 x 2.8 W Class-D

audio power amplifier

ST: TS2012IQT U2 QFN20 - TS2012 1 STMicroelectronics TS2012IQT

2.8 W filter-free mono Class-D

audio power amplifier

ST: TS4962IQT U3 DFN8 - TS4962 1 STMicroelectronics TS4962IQT

Low noise microphone preamplifier

ST: TS472IQT U4 QFN24_TS472 1 STMicroelectronics TS472IQT

Microphone KEEG1542PBL U5 KEC2740 1 Farnell (KINGSTATE) 1502746

Transducer, speaker

KSSG1708 U6 KSS1708 1 Farnell (KINGSTATE) 1502738



codeNote

www.BDTIC.com/ST

STM32F103 controller board UM0722

36/46 Doc ID 15867 Rev 1

Appendix B STM32F103 controller board

Figure 26. STM32F103 controller board - top overlay

Figure 27. STM32F103 controller board - bottom overlay

www.BDTIC.com/ST

UM0722 STM32F103 controller board

Doc ID 15867 Rev 1 37/46

Figure 28. TS4657 audio card - top layer

Figure 29. TS4657 audio card - bottom layer

www.BDTIC.com/ST

TS4657 audio card - artwork prints UM0722

38/46 Doc ID 15867 Rev 1

Appendix C TS4657 audio card - artwork prints

Figure 30. TS4657 audio card - top overlay

Figure 31. TS4657 audio card - bottom overlay

www.BDTIC.com/ST

UM0722 TS4657 audio card - artwork prints

Doc ID 15867 Rev 1 39/46

Figure 32. TS4657 audio card - top layer

Figure 33. TS4657 audio card - bottom layer

www.BDTIC.com/ST

STM32F103 controller board - schematic UM0722

40/46 Doc ID 15867 Rev 1

Appendix D STM32F103 controller board - schematic

Figure 34. STM32F103 controller board - schematic - part 1

3.3

V

US

BD

PU

SB

DN

JTM

SJT

CK

JTD

I

JTD

OJT

RS

T

NR

ST

C9

100

nF

BU

TTO

N

R6

10 k

Ω

BO

OT

1

BO

OT

0B

OO

T0

60

NR

ST

7

OS

C_I

N/P

D0

5

OS

C_O

UT

/PD

16

PA0-

WK

UP

14

PA1

15

PA2

16

PA3

17

PA4

20

PA5

21

PA6

22

PA7

23

PA8

41

PA9

42

PA10

43

PA11

44

PA12

45

PA13

/JT

MS

/SW

DIO

46

PA14

/JT

CK

/SW

CLK

49

PA15

/JT

DI

50

PB

026

PB

127

PB

2/B

OO

T1

28

PB

3/JT

DO

55

PB

4/JN

TR

ST

56

PB

557

PB

658

PB

759

PB

861

PB

962

PB

1029

PB

1130

PB

1233

PB

1334

PB

1435

PB

1536

PC

08

PC

19

PC

210

PC

311

PC

424

PC

525

PC

637

PC

738

PC

839

PC

940

PC

1051

PC

1152

PC

1253

PC

13-T

AM

PE

R-R

TC

2

PC

14-O

SC

32_I

N3

PC

15-O

SC

32_O

UT

4

PD

254

VB

AT1

VD

D_1

32

VD

D_2

48

VD

D_3

64

VD

D_4

19

VD

DA

13

VS

S_1

31

VS

S_2

47

VS

S_3

63

VS

S_4

18

VS

SA

12

U1

ST

M32

F10

3RE

T6

I2S

2_W

SI2

S2_

CK

I2S

2_S

D

I2S

2_M

CK

PC

0P

C1

PC

2P

C3

PA0

PA1

PA2

PA3

I2C

1_S

CL

I2C

1_S

DA

C15

100

nF

10 n

H

L1 Indu

ctor

3.3

V

A 3

.3 V

SP

I1_S

CK

SP

I1_M

OS

I

SP

I1_N

SS

SP

I1_M

ISO

VS

SA

R8

0 Ω

US

B_A

CT

IVIT

YLE

D_A

CT

IVE

VS

SA

X1

X2

Inte

rnal

pul

l-up

Inte

rnal

pul

l-up

Inte

rnal

pul

l-up

Inte

rnal

pul

l-dow

n

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

CN

1M

LW20

G3.

3 V

R2

10 K

Ω

R14

10 K

Ω

R1

10 K

ΩR

TC

K

DB

GR

Q

DB

GA

CK

JTR

ST

JTD

I

JTM

S

JTC

K

JTD

O

NR

ST

AM

0049

1

www.BDTIC.com/ST

UM0722 STM32F103 controller board - schematic

Doc ID 15867 Rev 1 41/46

Figure 35. STM32F103 controller board - schematic - part 21

23

45

67

89

1011

1213

1415

1617

1819

20

P2

BL2

20G

PC

0P

C1

PC

2P

C3

PA0

PA1

PA2

PA3

I2S

2_M

CK

US

B 5

V

3.3

V

A 3

.3 V

I2C

1_S

CL

I2C

1_S

DA

I2S

2_W

SI2

S2_

CK

I2S

2_S

DV

SS

A

AM

0049

3

2 1

B1

C7

100

nF

BU

TTO

N

3.3

V R10

10 k

Ω

C11

100

nF

3.3

V

C12

100

nF

C13

100

nF

C14

100

nF

122.

3 V

LD1

GM

E 96

0-02

4

3.3

V

LED

_AC

TIV

E1

2LD2

R13

220

Ω

R12

470

ΩU

SB

_AC

TIV

ITY

3.3

V

3.3

V

C16

100

nFR

910

KΩ

3.3

V

HO

LD7

VC

C8

S1

Q2

W3

VS

S4

D5

C6

U3

M25

P64

-VM

E6G

SP

I1_S

CK

SP

I1_M

OS

IS

PI1

_NS

SS

PI1

_MIS

O

C8

33 p

F

C10

33 p

F

X1

X2

123

4

GN

D

GN

DX

1

TS

X-3

225

/ 16

MH

z

C1

4.7µ

F3. 3

VU

SB

5 V

C2

1µF

C3

1µF

VIN

1

GN

D2

INH

B3

VO

UT

5

BY

PAS

S4

U2

LD39

85X

X33

C4

10 n

F

C5

4.7µ

F

US

BD

N

US

BD

P

US

B 5

V

R7

1 M

Ω

C6

4.7

nF

VB

US

1

D–

2

D+

3

GN

D4

SH

15

SH

26

US

B_A

CN

2U

SB

1X90

A P

CB

R4

4.7

Ω

R5

4.7

Ω

R3

1.5

kΩ3.

3 V

I/O1

1

GN

D2

I/O2

3I/O

24

VB

US

5I/O

16

U4

US

BLC

6-2P

6

US

B 5

V

www.BDTIC.com/ST

TS4657 audio card - schematic UM0722

42/46 Doc ID 15867 Rev 1

Appendix E TS4657 audio card - schematic

Figure 36. TS4657 audio card - schematic - part 1

5 V D

AC

_SD

AT

DA

C_B

CL

K

DA

C_M

CLK

DA

C_F

MT

2D

AC

_FM

T1

DA

C_L

RC

L K

ST

BY

_RS

TB

Y_L

G0

G1

SP

K_ST

BY

MIC

RO

_OU

TM

ICR

O_S

HD

N

DA

C_S

TB

YGN

D

12

34

56

78

910

1112

1314

1516

1718

1920

P1

VC

CA

GN

D

GN

DA

Con

trol

ler

boar

d co

nnec

tor

100

nFC16

10 µ

F /

16 V

C26

GN

D

5 V

LED

1

LED

_GR

EE

N_0

805

680

ΩR

6

GN

D

5 V

100

nF

C34

10 µ

F /

16 V

C35

GN

D

5 V

10 µ

F /

16 V

C36

GN

D

5 V

AM

0049

4

12

KE

EG

1542

PB

L

U5

MIC

RO

_OU

T

Mic

roph

one

1 K

ΩR

11

1 K

ΩR

12

10 K

ΩR

15

100

nFC

17

100

nF

C19

100

nF

C20

100

pF

C18

100

pF

C23

MIC

RO

_SH

DN

VC

CA

GN

DA

GN

DA

GN

DA

1617

20

Bia

s

G 21

58

IN–

IN+

GN

DG

ND

15 C1

OU

T+

OU

T–

4

14 C2

Bia

s2.

0 V

VC

C

ST

BY

10

9 2

22

BY

PS

GA

IN

ST

: TS

472I

QT

U4

VC

CA

GN

DA

C27

1 µ

F

GN

DA

0 Ω

/ 22

nF

C28

: ass

embl

y 0

Ω re

sist

or

for

DC

cou

plin

g

C28

C29

1 µF

GN

DA

100

KΩ

R3

GN

DA

Mic

roph

one

prea

mpl

ifier

68 Ω

R17

GN

DA

www.BDTIC.com/ST

UM0722 TS4657 audio card - schematic

Doc ID 15867 Rev 1 43/46


Gai

nse

lect

Gai

nse

lect

Sta

ndby

cont

rol

192015 11716

7 8

111452

93 4

1812

PW

MH

brid

ge

PW

MH

brid

ge

Osc

illat

or

13

RIN

+

RIN

–

L IN–

L IN+

G0

G1

ST

BY

L

ST

BY

R

AV

AG

ND

PG

ND

PG

ND

L OU

T+

L OU

T–

CC

PV

CC

PV

CC

RO

UT

+

RO

UT

–

21

E-P

AD

ST

: TS

2012

IQT

U2

5 V

5 V

5 V

ST

BY

_R

ST

BY

_LG0

G1

21

KS

SG

1708

U6

Spe

aker

RC

A W

BTO

R 1

J1

RC

A W

BTO

R 1

J3

Ext

erna

l

150

KΩ

R16

100

nF

C22

150

KΩ

R14

100

nF

C21

5 V

SP

K_S

TB

Y

C24

1 µF

5 V

Cha

nnel

sta

ndby

220

nF

C11

220

nFC12

220

nF

C13

220

nF

C15

100

nF

C25

Out

put

85

6

Osc

illat

or

PW

M

1 43

IN–

IN+

ST

BY

GN

DA

7

VC

CA

Hbr

idge

Inte

rnal

bias

OU

T+

OU

T–

300

KΩ

150

KΩ

150

KΩ

2NC

9

E-P

AD

ST

: TS

4962

IQT

U3

10 K

ΩR

13

GN

D

GN

DG

ND

GN

D

GN

D GN

DG

ND

GN

D

GN

D

10 K

ΩR9

10 K

ΩR

10

GN

DG

ND

GN

D

GN

D

spea

kers

Lum

berg

1

503

06

J4

Mon

o ja

ck

10 K

ΩR

2

10 K

ΩR

1GN

DG

ND

Gai

n co

ntro

l

1 2Te

rmin

albl

ock

P2 12

Term

inal

bloc

k P3

L1

BLM

18E

G22

1SN

1

100

pFC

9100

pFC

8

100

pFC

30

100

pFC

31

GN

D

GN

D

GN

D

100

pFC

32

100

pFC

33

GN

D

GN

D

L2

BLM

18E

G22

1SN

1

L3

BLM

18E

G22

1SN

1

BLM

18E

G22

1SN

1

L4

L5

BLM

18E

G22

1SN

1

L6

BLM

18E

G22

1SN

1

Mon

o C

lass

-D a

mpl

ifier

Ste

reo

Cla

ss-D

am

plifi

er

AM

0049

2

DA

CLO

UT

DA

CR

OU

T

www.BDTIC.com/ST

TS4657 audio card - schematic UM0722

44/46 Doc ID 15867 Rev 1


115

DA

C

DA

C1112

LDO

LDO

NC

P

PC

P

1413

Con

trol

inte

rfac

e

Dig

ital

audi

o

inte

rfac

e

Dig

ital

filte

rs

18

202

7 86543

19

9

MC

LK

BC

LK

FM

T1

FM

T2

SD

AT

LRC

LK

ST

DB

Y

17

GN

DD

GN

DD

GN

DA

10

GN

DA

GN

DA

16

VC

CA

VC

CD

VR

EG

AV

RE

GD

21E-P

AD

RO

UT

L OU

T

U1

820

Ω

R4

820

Ω

R5

2.2

nFC

10 2.2

nFC

14

1 µFC1

1 µFC2

1 µFC3

1 µFC4

DA

C

GN

D

GN

D

GN

D

GN

DG

ND

GN

D

5 V

5 V

DA

C_S

TB

Y

DA

C_S

DAT

DA

C_B

CL

K

DA

C_M

CL

K

DA

C_F

MT

2

DA

C_F

MT

1

10 K

ΩR7

10 K

ΩR

8

GN

DG

ND

DA

C_L

RC

LK

10 K

Ω

R20

GN

D

+ – + –

AM

0049

5

DA

CLO

UT

DA

CR

OU

T

C6

1 µF

5 V

100

nF

C7

GN

DG

ND

GN

D

C5

1 µF

www.BDTIC.com/ST

UM0722 Revision history

Doc ID 15867 Rev 1 45/46

Revision history

Table 8. Docsument revision history

Date Revision Changes

27-Aug-2009 1 Initial release.

www.BDTIC.com/ST

UM0722

46/46 Doc ID 15867 Rev 1

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