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APPENDIX
Appendix D: Serial Interface
Pin No.
Signal
Function
I/O
name direction
Pin No.
Signal
Function
I/O
name direction
1 FG Frame ground
2 TXD Send data OUT
3 RXD Receive data IN
4 RTS Request to send OUT
5–
6 DSR Data set ready IN
7 SG Signal GND
8–
9–
10 –
11 –
12 –
13 –
14 –
15 –
16 –
17 –
18 –
19 –
20 DTR Data terminal ready OUT
21 –
22 –
23 –
24 –
25 INIT Reset IN
<Viewed from Connector Surface>
13 12 11 10 9 8 7 6 5 4 3 21
25 24 23 22 21 20 19 18 17 16 15 14
D-1. RS-232C Connector