Localtalk Interface - Ricoh A193 Service Manual

RS-232C Interface
13
25
A 25 pin D-SUB female connector (ISO 2110)
PIN NO. SIGNAL NAME
2 STXD
3 SRXD
4 +10V
6 SDSR
20 SDTR

LocalTalk interface

An 8 pin female connector (DIN-8).
PIN NO. SIGNAL NAME
1 GND
2 HSK (I)
3 TXD- (O)
4 GND
5 RXD- (I)
6 TXD+ (O)
7 N.C.
8 RXD+ (I)
(A643)
DESCRIPTION
Serial transmit data
Serial receive data
Data set ready
Data terminal ready
8
DESCRIPTION
Handshake
Transmit data –
Signal ground
Receive data –
Transmit data
No connection
Receive data +
1
14
A643D501.wmf
6
3
1
A643D503.wmf
1-6 SM