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ST92163 DEMO BOARD CHARACTERISTICS
2.2.7 I/O EXPANSION CONNECTOR
On the I/O expander (J3) it is possible to connect a daughter board to develop specific appli-
cation. On this connector all the microcontroller’s pins are available but the developer will find
too the address latch outputs (pin 45 to 52), the RS232 DB9 connector pins (pin 1 to 7 and pin
34), VCC (pin 31 and 32) and GND (pin 33).
The table 5 shows the correspondence between I/O connector pins and signals.
Table 5. I/O expansion Connector signals
Pin number
Signal
Pin number
Signal
1A
DTR
1B
GND
2A
CTS
2B
RI
3A
TD
3B
P00
4A
RTS
4B
P01
5A
RD
5B
P02
6A
DSR
6B
P03
7A
DCD
7B
P04
8A
P50
8B
P05
9A
P51
9B
P06
10A
P52
10B
P07
11A
P53
11B
ASN
12A
P54
12B
DSN
13A
P55
13B
A0
14A
P56
14B
A1
15A
P57
15B
A2
16A
P60
16B
A3
17A
P61
17B
A4
18A
P62
18B
A5
19A
P63
19B
A6
20A
P64
20B
A7
21A
P65
21B
P10
22A
P30
22B
P11
23A
P31
23B
P12
24A
P32
24B
P13
25A
P33
25B
P14
26A
P34
26B
P15
27A
P35
27B
P16
28A
P36
28B
P17
29A
P37
29B
P40
30A
RESET
30B
P41
31A
V
CC
31B
P42
32A
V
CC
32B
P43
