Oki MICROLINE 320 Turbo Maintenance Manual page 116

80C51
RST
TD
RD
IF WR
LS245
+5 VD
10 VAC
+5 V
42089201TH Rev.4
ADR latch
DB0 to DB9
±9 V power
supply circuit
Figure B-2-1 Block Diagram
2764
ROM
8 KB
RAM
8 KB
+9 V
-9 V
+5V
0V
Oki Data CONFIDENTIAL
CN1
TD
RD
Serial data
control line
Bus line
Control line
116 /