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  • ELMOS Semiconductor AG Data Sheet QM-No.: 25DS0046E.01

    KNX/ EIB TRANSCEIVER E981.03

    1/51

    ELMOS Semiconductor AG reserves the right to change the detail specifications as may be required to permit improvements in the design of its products.

    PRODUCTION DATA - JUL 2, 2012

    Key Features

    KNX Interface

    UART host interface

    Included power supplies:

    SPI host interface

    Applications

    Typical Applications Circuit

    Certified with KNX TP1-256 application Autonomous MAC and individual physical address Included protocol handling Included power supply for bus powered

    applications with selectable bus current limitation

    Extended frames with up to 254 byte payload Analog Mode (direct RX / TX interface) Autonomous Telegram trigger Alarm Telegram Autonomous poll data transfer

    Supports 9.6 k, 19.2 k, 115.2 k 9 bit mode for easy data stream interpretation Optional CRC (at 19.2kBd and 115.2 kBd)

    if not used 4 GPIOs are available

    20V supply, up to 20mA 3.3V (50mA) / 5V (30mA) DC/DC converter

    Sensors, actuators, routers, gateways, Bus-powered or externally supplied

    Security applications

    is a Konnex Association registered trademark.

    SPI is a Motorola Inc. trademark.

    General DescriptionThe E981.03 combines the TP1-256 physical layer, the communication controller and two DC supply outputs for bus powered applications. The internal power man-agement assures KNX conformance under all load con-ditions.

    The connection between the E981.03 and the host pro-cessor can be established by either UART or SPI compat-ible interfaces, or in direct Analog Mode.

    Ordering Information

    Product ID Temp Range Package

    E981.03 -25C to +85C QFN32L7

    GND

    SCS

    SCK

    MISO

    MOSI

    SAVE

    TXD

    RXD

    ELA-0120

    12345678

    9 10 11 12 13 14 15 16

    32 31 30 29 28 27 26 25

    2423222120191817

    33 XTALEXTALINTBS1BS0VIOV33I

    SETVCCAOUT

    i.c.RESETOTEMP

    BUSN

    RTXL

    RTXH

    BUSP i.c.

    V20

    VCCSWCREC

    WK

    VST i.c.

    E981.03

    Minimal Function of KNX IC Maximum Function of KNX IC with VIO

    Outline

    SETVCC

    GND

    SCS

    SCK

    MISO

    MOSI

    TXD

    RXD

    ELA-0120

    12345678

    2423222120191817

    33

    V33I

    AOUTi.c.

    RESETOTEMP

    i.c.

    V20

    CRECWK

    VST i.c.

    E981.03

    XTALEXTALINTBS1BS0VIO

    BUSN

    RTXL

    RTXH

    BUSP

    VCCSW

    161514131211109

    2526272829303132

    OTEM

    P

    INTBS0

    VIOVCCSW XT

    ALEX

    TAL

    BS1

    GNDSCSSCKMISOMOSI

    TXDRXD

    ELA-0120

    33

    V33I

    AOUT

    i.c. RESE

    T

    V20

    CREC

    WK

    VSTi.c.

    E981

    .03

    BUSNRTXLRTXHBUSP

    161514131211109

    2526272829303132

    2423222120191817

    12345678

    SETV

    CC

    GND

    MOSI

    TXD

    ELA-0120

    33

    i.c. E981.03RTXL

    161514131211109

    2526272829303132

    2423222120191817

    12345678 SAVE

    TitleD1 BUSP

    CREC

    RTX

    CRECRTXH

    RTXLBUSN

    EXTAL

    XTALGND

    RXDTXD

    VIO

    SET_VCC

    E981.03

    UART C

    Applic

    ation

    BUS Coupling Module

    VCC

    RSET

    TP1-256+-

    U1

    C33I CST CVCC CCVCCDSPSLSPS

    V33I VST SW VCC

    CCST

    C20

    V20 20V

    CVIO

    Q

    BUS Coupling Module

    UART

    host

    proce

    ssor

    Optio

    nal

    Opto-

    co

    upler

    Application Module

    Q

    U1

    CCST CST

    RTX

    CREC

    C33I

    CVCC CCVCCDSPS

    LSPSRVCC

    CVIO

    D1

    DVIO

    RSET

    VVIO = VVCC (30mA)SETVCC=VIO

    QVVIO

    VVIOOTE

    MP

    INTBS0

    VIOVCCSW XT

    ALEX

    TAL

    BS1

    GNDSCSSCKMISOMOSI

    TXDRXD

    ELA-0120

    33

    V33I

    AOUT

    i.c.

    RESE

    T

    V20

    CREC

    WK

    VSTi.c.

    E981

    .03

    BUSNRTXLRTXHBUSP

    161514131211109

    2526272829303132

    2423222120191817

    12345678

    SETV

    CC

    GND

    MOSI

    TXD

    ELA-0120

    33

    i.c. E981.03RTXL

    161514131211109

    2526272829303132

    2423222120191817

    12345678 SAVE

    IC1

    BUS Coupling Module

    Optio

    nal

    Opto-

    co

    upler

    Optio

    nal

    Opto-

    co

    upler

    VVIOUA

    RT

    host

    proce

    ssor

    SPI

    Optio

    n

    Optio

    nal

    Opto-

    co

    upler

    GPIO

    Analog IN

    GPIO / ResetNGPIO

    Optio

    nal O

    ptoco

    upler

    GPIO

    VCC= 3.3VVCC= 5VOPEN= Alarm

    VV20=20V / 20mA

    VVCCVVIO

    GPIO

    Optio

    nal

    Opto-

    co

    upler

    U1

    CCST CST

    RTX

    CREC

    C33I

    CVCC CCVCCDSPS

    LSPSRVCC

    CVIO

    D1

    DVIO

    RSET

    QVVCC= 3.3V (50mA)SETVCC=GNDVVCC= 5V (30mA)SETVCC=VVIO

    OTEM

    P

    INTBS0

    VIOVCCSW XT

    ALEX

    TAL

    BS1

    GNDSCSSCKMISOMOSI

    TXDRXD

    ELA-0120

    33

    V33I

    AOUT

    i.c.

    RESE

    T

    V20

    CREC

    WK

    VSTi.c.

    E981

    .03

    BUSNRTXLRTXHBUSP

    161514131211109

    2526272829303132

    2423222120191817

    12345678

    SETV

    CC

    GND

    MOSI

    TXD

    ELA-0120

    33

    i.c. E981.03RTXL

    161514131211109

    2526272829303132

    2423222120191817

    12345678 SAVE

    IC1

    C20

    Optio

    nal

    Isolat

    ionam

    plifie

    r

  • 2/51

    ELMOS Semiconductor AG Data Sheet QM-No.: 25DS0046E.01

    PRODUCTION DATA - JUL 2, 2012

    ELMOS Semiconductor AG reserves the right to change the detail specifications as may be required to permit improvements in the design of its products.

    KNX/ EIB TRANSCEIVER E981.03

    Pin Configuration

    Top View

    Note: Not to scale, EP Exposed die pad

    Functional Diagram

    1

    9 10 11 12 13 14 15 16

    32

    EP

    31 30 29 28 27 26 25

    OTEMP

    2RESET

    3i.c.

    4AOUT

    5SETVCC

    6V33I

    7WK

    8

    BUSN

    RTX

    L

    RTX

    H

    BUSP i.c

    .

    V20 VST i.c

    .

    SAV

    E

    MO

    SI

    MIS

    O

    SCK

    SCS

    GN

    D

    RXD

    TXD

    CREG

    24 XTAL

    Bottom SidePIN 1-Marker

    23 EXTAL

    22 INT

    21 BS1

    20 BSO

    19 VIO

    18 VCC

    17 SW

    E981.03

    Block diagram

    Switch C:Open: When VVST is below VV20,off,abs or VV20,off,rel VVST < VV20,off,abs,typ = VVST,SAVE,HL,typ+1 V=14V+1V=15V VVST > VBUSP,mean- 6 V

    Close: When VVST is above either VV20,on,abs and VV20,on,rel VVST > VV20,on,abs,typ = VVST,SAVE,LH,abs,typ+1 V=15V+1V=16V VVST > VVBUSP,mean- 5 V

    C33ICST CVCC

    V33I(6)

    VST(15)

    VCC(18)

    CV20

    V20(14)

    V20supply

    V33Isupply

    VCC buckconverter

    Switch A

    Switch C

    D

    BUSP

    IVSTIV20

    IV33IIVCC

    Switch B

    VVST VV20 VV33I VVCC

    VBUSP

    1 2

    Switch A:Switch to 0: Only after PON until end of soft-startSwitch to 1: (VVCC is 3.3V) and (VVIO is in valid range >~3.1 ~3.1

  • 3/51

    ELMOS Semiconductor AG Data Sheet QM-No.: 25DS0046E.01

    PRODUCTION DATA - JUL 2, 2012

    ELMOS Semiconductor AG reserves the right to change the detail specifications as may be required to permit improvements in the design of its products.

    KNX/ EIB TRANSCEIVER E981.03

    Pin Description

    Pin Name Type 1) Pull Description

    1 OTEMP D_O - Over-temperature warning

    2 RESET D_IO Up Bidirectional reset pin (low active)

    3 i.c. - - Reserved for factory use, connect to GND during operation.

    4 AOUT A_O - Analog multiplexer output

    5 SETVCC D_I 2)Combination of - selection of the VCC output voltage and - alarm function activation

    6 V33I S - 3.3V internal supply: Connect to external capacitor

    7 WK HV_D_IO -Output with tri-state capability; used for KNX telegram triggerOutput [default]: VIO related output levels Input: VST tolerant. Thresholds V

    V33i related

    8 CREC HV_A_I - Receive pin for KNX bus communication

    9 BUSN S - Connection to the negative bus line

    10 RTXL HV_A_IO - Ground connection of external resistor RTX

    11 RTXH HV_A_IO - KNX send output pin - upper connection of external resistor RTX

    12 BUSP HV_S - Connection to positive KNX bus via external diode for reverse polar-ity protection

    13 i.c. - - Reserved for factory use, connect to GND during operation.

    14 V20 HV_S - 20V DC supply output

    15 VST HV_S - Connection to external storage capacitor CST

    16 i.c. - - Do not connect externally

    17 SW HV_A_IO - Switched output of DC/ DC converter

    18 VCC A_I - DC/ DC converter output voltage control input

    19 VIO S - Supply for digital IO pins (connect to VCC if no external supply is used)

    20 BS0 D_I Down Baud rate select pin 0

    21 BS1 D_I Down Baud rate select pin 1

    22 INT D_O - Used for KNX collision trigger (low active)

    23 EXTAL D_O - External crystal terminal 2

    24 XTAL D_I - External crystal terminal 1 or clock input if no crystal is connected

    25 TXD D_O - UART transmit signal: from E981.03 to host processor (push/pull)

    26 RXD D_I Down UART receive signal: from host processor to E981.03

    27 GND S - GND pin

    28 SCS D_I Up SPI chip select (low active) or General

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