Intel 8XC196MC Benutzerhandbuch
8XC196MC, MD, MH USER’S MANUAL
15-30
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#, 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.
Figure 15-20. Timings of Address Valid with Write Strobe Mode
ADV#
WRH#
AD15:0
Valid
Data Out
Address
16-bit Bus Cycle
8-bit Bus Cycle
Address High
Addr
Low
Low
Data Out
ADV#
WRL#
AD7:0
AD15:8
Valid
WRL#
A3096-02