UPD784020 Datasheet, PDF (74/90 Pages) NEC – 16/8-BIT SINGLE-CHIP MICROCOMPUTER

Hold Timing
ASTB, A8-A19,
AD0-AD7, RD, WR
HLDRQ
HLDAK
tFHQC
tDCFHA
tDHQHHAH
External WAIT Signal Input Timing
(1) Read operation
ASTB
A8-A19
tDSTWT
tDSTWTH
tHSTWTH
AD0-AD7
RD
WAIT
(2) Write operation
ASTB
A8-A19
tDAWT
tDRWTL
tHRWT
tDRWTH
tDSTWT
tDSTWTH
tHSTWTH
AD0-AD7
WR
WAIT
74
tDAWT
tDWWTL
tHWWT
tDWWTH
mPD784020, 784021
tDHAC
tDHQLHAL
tDWTID
tDWTR
tDWTW