W78E54C Datasheet, PDF (18/24 Pages) Winbond – 8-BIT MICROCONTROLLER

W78E54C/W78E054C
8. TIMING WAVEFORMS
8.1 Program Fetch Cycle
XTAL1
S1 S2 S3 S4 S5 S6 S1 S2 S3 S4 S5 S6
ALE
PSEN
PORT 2
T_APL
T_PSW
T_AAS
T_AAH
T_PDA
PORT 0
Code
A0-A7
Data
T_ALW
T_PDH, T_PDZ
A0-A7
Code A0-A7
Data A0-A7
8.2 Data Read Cycle
XTAL1
ALE
PSEN
PORT 2
PORT 0
RD
S4 S5 S6 S1 S2 S3 S4 S5 S6 S1 S2 S3
A0-A7
T DAR
A8-A15
T DDA
DATA
T DDH, T DDZ
T DRD
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