Intel 8XC196MC User Manual page 338

Figure 15-12 shows an 8-bit system with both flash and RAM. The flash is the lower half of mem-
ory, and the RAM is the upper half. This system configuration uses the most-significant address
bit (AD15) as the chip-select signal and ALE as the address-latch signal.
AD15
AD14:8
8XC196
AD7:0
ALE
RD#
WR#
A7:0
74AC
373
LE
Figure 15-12. 8-bit System with Flash and RAM
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INTERFACING WITH EXTERNAL MEMORY
CS#
A14:8
D7:0
32K×8
Flash
(28F256)
A7:0
OE#
CS#
A12:8
D7:0
8K×8
RAM
A7:0
OE# WE#
A3140-01
15-23