M82C288
CMDLY is first sampled on the falling edge of the
CLK ending T . If sampled HIGH, the command out-
put is not activated, and CMDLY is again sampled
on the next falling edge of CLK. Once sampled
LOW, the proper command output becomes active
sitions of all signals in all modes. Instead, all signal
timing relationships are shown via the general cas-
es. Special cases are shown when needed. The
waveforms provide some functional descriptions of
the M82C288; however, most functional descriptions
are provided in Figures 5 through 11.
S
e
e
mand goes active no earlier than shown in Figures 9
immediately if MB
0. If MB
1, the proper com-
and 10.
To find the timing specification for a signal transition
in a particular mode, first look for a special case in
the waveforms. If no special case applies, then use
a timing specification for the same or related func-
tion in another mode.
READY can terminate a bus cycle before CMDLY
allows a command to be issued. In this case no
commands are issued an the bus controller will de-
activate DEN and DT/R in the same manner as if a
command has been issued.
Waveforms Discussion
The waveforms show the timing relationships of in-
puts and outputs and do not show all possible tran-
12