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Elmos Semiconductor AG

Data Sheet

QM-No.: 25DS0046E.03

PRODUCTION DATA - JAN 15, 2015

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

TXD

RXD

GND

SCS

SCK

MISO

MOSI

SAVE

Pin 1

i.c.

Bottom Side

VST

V20

i.c.

BUSP

RTXH

RTXL

BUSN

1

EP

25

26

27

28

29

30

31

32

16

15

14

13

12

11

10

9

2

3

4

5

6

7

8

24 23 22 21 20 19 18 17

E981.03

Typical Application Circuit **1

CREC

RTXH

RTXL

BUSN

EXTAL

XTAL

GND

RXD

TXD

VIO

SET_VCC

E981.03

BUS

Coupling

Module

VCC

TP1-256

+ -

V33I

VST

SW

VCC

V20

20V

Q

Functional Diagram **2

(5) SETVCC

E981.03

(2) RESET

(1) OTEMP

clock

system

KNX / EIB

Interface

UART host

interface

(12) BUSP

(8) CREC

(11) RTXH

(10) RTXL

(9) BUSN

(23) EXTAL

(24) XTAL

(27) GND

(26) RXD

(25) TXD

(19) VIO

(31) MISO / GPIO

(30) MOSI / GPIO

(29) SCK / GPI

(28) SCS / GPI

SPI host

interface

(3) i.c.

(13) i.c.

IC supply

IC start-up

20V

Supply

Current

Limiter

ADC/DAC

Internal

Logic

(21) BS1

(20) BS0

(32) SAVE

(4) AOUT

Monitoring

Unit

(22) INT

Mode

Control

(7) WK / GPI

Switched

Power supply

(6)

V33I

(15)

VST

(17)

SW

VCC

(14)

V20

(16) i.c.

(18)

VCC

V20

+ -

Q

TP1-256

+ -

Minimal Function of E981.03 **3

BUS

Coupling

Module

Application

Module

Q

(50mA)

Q

GND

SCS

SCK

MISO

MOSI

TXD

RXD

33

V20

VST

i.c.

BUSN

RTXL

RTXH

BUSP

16

15

14

13

12

11

10

9

25

26

27

28

29

30

31

32

GND

MOSI

TXD

33

i.c.

E981.03

RTXL

16

15

14

13

12

11

10

9

25

26

27

28

29

30

31

32

SAVE

IC1

Full Normal Mode Application **4

BUS

Coupling

Module

V

VIO

GPIO

Analog IN

GPIO / ResetN

GPIO

GPIO

VCC= 3.3V

VCC= 5V

OPEN= Alarm

GPIO

Q

SETVCC=GND

GND

SCS

SCK

MISO

MOSI

TXD

RXD

33

V20

VST

i.c.

BUSN

RTXL

RTXH

BUSP

16

15

14

13

12

11

10

9

25

26

27

28

29

30

31

32

GND

MOSI

TXD

33

i.c.

E981.03

RTXL

16

15

14

13

12

11

10

9

25

26

27

28

29

30

31

32

SAVE

IC1