Oki MSM85C154HVS - Page 46

SYSTEM CONFIGURATION
39
D0 D1 D2 D3 D4 D5 D6 D7
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
MSM74HC373
LATCH
P0.0 P0.1 P0.2 P0.3 P0.4 P0.5 P0.6 P0.7
ALE
RD
MSM80C154S/MSM83C154S
A0 A1 A2 A3 A4 A5 A6 A7 CS R/W
76543210
ROM
256W × 8BIT
I/O
WR
Figure 2-28 Connection circuit for external data memory addressed by register R0 or R1