UPD784218 Datasheet, PDF (77/92 Pages) NEC – 16-/8-BIT SINGLE-CHIP MICROCONTROLLERS

(2) Write operation
(CLK)
A0 to A7
(Output)
µPD784218, 784218Y
tCYK
Lower address
Lower address
A8 to A19
(Output)
AD0 to AD7
(Output)
ASTB
(Output)
WR
(Output)
WAIT
(Input)
Hi-Z
Higher address
tDAID
tDSTOD
Lower address
Hi-Z
(Output)
tSAST
tHSTLA
tFRA
tHWA
tDAW
Data (Output) ^Hi-Z
tHWOD
tSODWR
Higher address
Lower address
(Output)
tWSTH
tDSTW
tDAW
tDAWT
tDWWTL
tDWOD
tWWL
tDWWTH
tHWWT
tDWTW
tDWTID
tDWST
tDSTWT
tDSTWTH
tHSTWT
Remark Signals are output from A0 to A7 while ports 80 to 87 are not being used.
Data Sheet U12304EJ2V0DS00
77