UPD784224 Datasheet, PDF (77/92 Pages) NEC – 16/8-BIT SINGLE-CHIP MICROCONTROLLERS

Timing Waveform
(1) Read operation
(CLK)
A0 to A7
(Output)
µPD784224, 784225, 784224Y, 784225Y
tCYK
Lower address
Lower address
A8 to A19
(Output)
AD0 to AD7
(Input/output)
ASTB
(Output)
RD
(Output)
WAIT
(Input)
Hi-Z
Higher address
tDAID
tDSTID
Lower address
Hi-Z
(Output)
tSAST
tHSTLA
tFAR
Data (Input)
tHRID
tWSTH
tDSTR
tDAR
tDAWT
tDRWTL
tDRID
tDRWTH
tHRWT
tWRL
tDWTR
tDWTID
Higher address
tHRA
tDRA
Hi-Z
Lower address
(Output)
tDRST
tDSTWT
tDSTWTH
tHSTWT
Data Sheet U12376EJ1V0DS00
77