Description Of Input/Output Signals; Req Signal, Ack Signal And Txd Signal - Toshiba MR-3011 Service Manual

11. DESCRIPTION OF INPUT/OUTPUT SIGNALS

11.1 REQ Signal, ACK Signal and TxD Signal

1
CN2.1 ACK
6
CN2.6 TxD
10
CN2.10 REQ
This circuit is an input circuit for communication with the scanner. The input is "1" for 5V and "0" for 0V. The logic
for the connector area and that for the input port of CPU are the same.
October 2000 © TOSHIBA TEC
+5V
1
K 3
R24
DA3
R27
2 2
1
1
C118
A 1
2
SGND
+5V
1
K 3
R23
DA2
R26
2 2
1
1
C119
A 1
2
SGND
+5V
1
K 3
R22
DA1
R25
2 2
1
1
C120
A 1
2
SGND
IC1.1
2 1 2 3
ACK Y
1
C3
2
IC1.3
2 5 6 1
ACK Y
1
C2
2
IC1.2
2 3 4 5
ACK Y
1
C1
2
11-1 MR-3011/3012 INPUT/OUTPUT SIGNALS
TP5
IC2.2
4 1
A Y
TP3
IC2.1
2 1
A Y
TP1
IC2.3
6 1
A Y
ACK
RxD
REQ