13-27
EXTERNAL MEMORY INTERFACE
Figure 13-25. Bus Diagram for Example 5: 80C251SB in Nonpage Mode
A4145-01
A7:0
Latch
A15:8
A/D7:0
EPROM
(64 Kbytes)
OE#
CE#
A15:8
A7:0
D7:0
PSEN#
80C251SB
RD#
WR#
EA#
P2
P0
D7:0
A15:8
A7:0
RAM
(64 Kbytes)
CE#
OE#
WE#
Data
Code
