Oki OKIFAX4550 Maintenance Manual page 339

Between the MCNT and OPE, serial data is transferred via the SIO incorporated in the CPU1.
<Communication method>
1) Communication method : Start-stop synchronization
2) Transfer rate
3) Data length
<Data configuration>
1) Status bit
2) Data
3) Even parity
4) Stop bits
Error = ±5%
D0
START
BIT
Figure A.24 (3/4) Communication signal (TXDOPE/RXDOPE) between MCNT and OPE
CPU1
SH7034
PC1V (+5 V)
to OPE
PC1G (0 V)
PC2V (+5 V)
PC2G (0 V)
41309401TH Rev.4
: 5832 bps
: 8 bits
: 1 bit
: 8 bits
: 1 bit (ignored by OPE)
: Bits 1 and 5
D1 D2 D3
R46
to OPE
PC1-N
PC2-N
Figure A.24 (4/4) Related Signals of PC1/PC2
D4 D5 D6 D7
CN3
1
2
3
4
5
6
Note: PC1 (presence of document on hopper)
PC2 (presence of document at scanning position)
EVEN
PARITY
STOP
BIT
PC1
PC2
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