w77e58 Winbond Electronics Corp America, w77e58 Datasheet - Page 80

• Manufacturer Part Number: w77e58
• Description: 8 Bit Microcontroller
• Manufacturer: Winbond Electronics Corp America

PROGRAM MEMORY READ CYCLE
PORT 0
PORT 2
PSEN
ALE
t
C
H
I
Q
V
X
Time
Clock
Logic level high
Instruction
Output Data
Valid
No longer a valid state
t
LHLL
t
AVLL
ADDRESS
A0-A7
t
LLAX1
t
t
ADDRESS A8-A15
AVIV1
AVIV2
t
LLIV
t
t
LLPL
PLIV
t
PLPH
t
PLAZ
A
D
L
P
R
W
Z
- 80 -
INSTRUCTION
t
PXIX
Address
Input Data
Logic level low
Tri-state
PSEN
RD signal
WR signal
IN
t
PXIZ
Preliminary W77E58
ADDRESS A8-A15
ADDRESS
A0-A7