7721 Datasheet, PDF (422/577 Pages) List of Unclassifed Manufacturers – H Bridge Power Module

APPLICATION
16.1 Memory connection
<When reading>
E, OC (AC245)
A8/D8–A15/D15
A16/D0–A23/D7
RD
Data output A from
external memory (AC245)
tw(EL) = 135 (min.)
A
AC32(tPHL)
tpzx(E-DLZ/DHZ) = 20 (min.)
A
AC32(tPLH)
AC245
(tPZH/tPZL)
D
AC245
(tPHZ/tPLZ)
<When writing>
1
1
E, OC (AC245)
tw(EL) = 135(min.)
1Q (AC74)
2Q (AC74)
WO, WE
A8/D8–A15/D15
A16/D0–A23/D7
Data output B from
external memory (AC245)
AC04(tPLH) + AC74(tPLH)
AC32 ! 2(tPLH)
35 (max.)
A
D
AC245
(tPHL/tPLH)
D
AC245
(tPHZ/tPLZ)
Write hold time
Fig. 16.1.15 Timing chart for circuit example using bus buffers (2)
(Unit : ns)
7721 Group User’s Manual
16–19