SA9109B

sames

5/18

PIN DESCRIPTION (continued)

Pin

Designation

Type

Description

23

S[0]

Output

Liquid crystal display (LCD) segment drivers

24

S[1]

Output

25

S[2]

Output

26

S[3]

Output

27

S[4]

Output

28

S[5]

Output

29

S[6]

Output

30

S[7]

Output

31

S[8]

Output

32

S[9]

Output

33

S[10]

Output

34

S[11]

Output

35

S[12]

Output

36

S[13]

Output

22

COFF

Output

Connection for all unused LCD segments, to ensure

off status

7

CON

Analog

Connections for outer loop capacitor of A/D

6

COP

Analog

converter (Current)

5

CIN

Analog

Connections for inner loop capacitor of A/D

4

CIP

Analog

converter (Current)

16

CPIP

Analog

Connections for inner loop capacitor of A/D

15

CPIN

Analog

converter (Voltage)

14

CPOP

Analog

Connections for outer loop capacitor of A/D

13

CPON

Analog

converter (Voltage)

12

VREF

Analog

Connection for reference current setting resistor

39

SDO

Open drain Pulse rate output. Serial data output when PB is low

44

SR[0]

Input

Control for tariff register selection (on-chip pull-up)

1

SR[1]

Input

Control for tariff register selection (on-chip pull-up)

43

PB

Input

Push Button: Display select/start serial data

transmission on SDO (on-chip pull-up)

42

PGM

Input

Programming Mode. It is recommended that pin PGM be

connected to V

transients or noise

41

PDTA

Input

Programming Data (on-chip pull-down)

40

PCLK

Input

Programming Clock