Write Strobe Mode - Intel 8XC196K Series User Manual

8XC196K x , J x , CA USER'S MANUAL

15.6.2 Write Strobe Mode

The write strobe mode eliminates the need to externally decode high- and low-byte writes to ex-
ternal 16-bit RAM in 16-bit bus mode. When the write strobe mode is selected, the device gen-
erates WRL# and WRH# instead of WR# and BHE#. WRL# is asserted for all low byte writes
(even addresses) and all word writes. WRH# is asserted for all high byte writes (odd addresses)
and all word writes. In the 8-bit bus mode, WRH# and WRL# are asserted for both even and odd
addresses. Figure 15-13 shows write strobe mode timing.
ALE
WRL#
WRH#
AD15:0
Address
16-bit Bus Cycle
15-24
Valid
WRL# and WRH#
AD7:0
Valid
AD15:8
Data Out
Figure 15-13. Write Strobe Mode
ALE
Address Low Data Out
Address High
8-bit Bus Cycle
A3089-01