SA9109B
PIN DESCRIPTION (continued)
Pin
23
24
25
26
27
28
29
30
31
32
33
34
35
36
22
7
6
5
4
16
15
14
13
12
39
44
1
43
42
Designation
S[0]
S[1]
S[2]
S[3]
S[4]
S[5]
S[6]
S[7]
S[8]
S[9]
S[10]
S[11]
S[12]
S[13]
COFF
CON
COP
CIN
CIP
CPIP
CPIN
CPOP
CPON
VREF
SDO
SR[0]
SR[1]
PB
PGM
Type
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Description
Liquid crystal display (LCD) segment drivers
41
40
PDTA
PCLK
Connection for all unused LCD segments, to ensure
off status
Analog
Connections for outer loop capacitor of A/D
Analog
converter (Current)
Analog
Connections for inner loop capacitor of A/D
Analog
converter (Current)
Analog
Connections for inner loop capacitor of A/D
Analog
converter (Voltage)
Analog
Connections for outer loop capacitor of A/D
Analog
converter (Voltage)
Analog
Connection for reference current setting resistor
Open drain Pulse rate output. Serial data output when PB is low
Input
Control for tariff register selection (on-chip pull-up)
Input
Control for tariff register selection (on-chip pull-up)
Input
Push Button: Display select/start serial data
transmission on SDO (on-chip pull-up)
Input
Programming Mode. It is recommended that pin PGM be
connected to V
DD
via a 470Ω resistor to guard against
transients or noise
Input
Programming Data (on-chip pull-down)
Input
Programming Clock
sames
5/18
SAMES [ SAMES ]
