4-168

82C237

Timing Waveforms

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.

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.

CS

A0 - A3

IOW

DB0 -DB7

INPUT VALID

INPUT VALID

TWWS

(55)

TDW

(44)

TCWL

(43)

TAWL

(42)

TWC (53)

TWA (52)

TWD (54)

CS

A0 - A3

IOR

DB0 -DB7

ADDRESS MUST BE VALID

TAR

(41)

TRDE

(46)

TRDF

(47)

TRA (45)

TRW

(51)

DATA OUT VALID