W78E54B Datasheet, PDF (18/21 Pages) Winbond – 8-BIT MICROCONTROLLER

Timing Waveforms, continued
Port Access Cycle
XTAL1
ALE
PORT
INPUT
SAMPLE
S5
TPDS
T PDH
W78E54B
S6
S1
T PDA
DATA OUT
Program Operation
P2, P1 ^VIH
(A15... A0) _VIL
P3.6 V_IH
(CE) V_IL
P3.3 ^VIH
(OECTRL) _VIL
P3.7 _VIH
(OE) _VIL
P0 ^VIH
(A7... A0) _VIL
Vcp
Vpp
V_IH
Program
Program
Verify
Address Stable
T_AS
T_PWP
T_AH
TOCS
T_OCH
T_DH
Data In
T_DS
T_VPS
T_OES
T_DFP
D OUT
T_OEV
Read Verify
Address Valid
Data Out
- 18 -