Address Valid With Write Strobe Mode - Intel 8XC196MC User Manual

8XC196MC, MD, MH USER'S MANUAL

15.5.4 Address Valid with Write Strobe Mode

When the address valid with write strobe mode is selected, the microcontroller generates the
ADV#, RD#, WRL#, and WRH# bus-control signals. This mode is used for a simple system us-
ing an external 16-bit data bus. Figure 15-20 shows the timing. The RD# signal (not shown) is
similar to WRL# and WRH#. The example system of Figure 15-21 uses address valid with write
strobe to access byte-wide RAMs with a 16-bit data bus.
ADV#
WRL#
WRH#
Address
AD15:0
Figure 15-20. Timings of Address Valid with Write Strobe Mode
15-30
Valid
Valid
Data Out
16-bit Bus Cycle
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ADV#
WRL#
Addr
AD7:0
Low
Address High
AD15:8
8-bit Bus Cycle
Data Out
A3096-02