Oki Microline 3320 - Page 144

C – 3






OCS
P1P2P0
P3
TD
RD
IF WR
LS245
2764

ROM

8 KB
RD
TD
RAM

8 KB
Driver
+5 VD
10 VAC
+5 V
+9 V
–9 V
+5V
0V
±9 V power
supply circuit
Serial data
control line
Bus line
Control line





ADR latch
Receiver
DB0 to DB9
ADR/data bus
ADR bus
80C51
RST
CN1
Figure C-2-1 Block Diagram