82C237 Datasheet, PDF (21/25 Pages) Intersil Corporation – CMOS High Performance Programmable DMA Controller

Timing Waveforms
82C237
CS
IOW
A0 - A3
DB0 -DB7
TCWL
(43)
TAWL
(42)
TWWS
(55)
INPUT VALID
TDW
(44)
INPUT VALID
TWC (53)
TWA (52)
TWD (54)
FIGURE 10. SLAVE MODE WRITE
NOTE: Successive WRITE accesses to the 82C237 must allow at least TCY as recovery time between accesses. A TCY recovery time must
be allowed before executing a WRITE access after a READ access.
CS
A0 - A3
IOR
DB0 -DB7
TAR
(41)
ADDRESS MUST BE VALID
TRW
(51)
TRDE
(46)
TRA (45)
TRDF
(47)
DATA OUT VALID
FIGURE 11. SLAVE MODE READ
NOTE: Successive READ accesses to the 82C237 must allow at least TCY as recovery time between accesses. A TCY recovery time must
be allowed before executing a READ access after a WRITE access.
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