w78l812a Winbond Electronics Corp America, w78l812a Datasheet - Page 24

• Manufacturer Part Number: w78l812a
• Description: 8-bit Mcu Series 80c51-based
• Manufacturer: Winbond Electronics Corp America

10. TIMING WAVEFORMS
10.1 Program Fetch Cycle
10.2 Data Read Cycle
PORT 2
PORT 0
PORT 2
PORT 0
PSEN
XTAL1
XTAL1
PSEN
ALE
ALE
RD
Code
S1
S4
T
AAH
A0-A7
A0-A7
S2
S5
T
AAS
T
T
T
S3
PDA
APL
S6
DAR
T
PSW
Data
S4
S1
A8-A15
T
A0-A7
T
DDA
S2
S5
T
PDH,
DRD
T
- 24 -
ALW
T
PDZ
S3
S6
DATA
Code
S4
S1
T
W78LE812/W78L812A
DDH,
A0-A7
S5
S2
T
DDZ
S6
S3
Data
S1
S4
A0-A7
S2
S5
S3
S6