11-2
October 2000 © TOSHIBA TEC
MR-3011/3012 INPUT/OUTPUT SIGNALS
11.2 DF-ACK Signal, DF-REQ Signal and RxD Signal
This circuit is an output circuit for communication with the scanner. The output is "1" for 5V and "0" for 0V. The
logic for the connector area and that for the output port of CPU are the same.
1
2
R4
SGND
2
E
1
B
5
C
Q2.1
CN2.8
DF-ACK
10
A
11
Y
1
TP6
2
+5V
1
R1
1
2
R11
8
IC2.5
DF_ACK
DF-REQ
CN2.9
9
+5V
SGND
E
Q2.2
2
B
3
C 4
R5
1
2
8
R2
1
2
A
Y
9
IC2.4
2
1
TP2
1
R12
DF_REQ
RxD
CN2.4
4
+5V
SGND
E
Q1.2
2
B
3
C 4
R6
1
2
12
R3
1
2
A
Y
13
IC2.6
2
1
TP4
1
R13
TXD
2
1
R7
+5V
#Chapter_11.p65
10/5/00, 9:58 AM
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