W77C32/W77C032A
Last Cycle
of Previous
Instruction
First
Machine cycle
Second
Machine cycle
Next Instruction
Machine Cycle
MOVX instruction cycle
C1 C2 C3 C4 C1 C2 C3 C4 C1 C2 C3 C4 C1 C2 C3 C4
CLK
ALE
PSEN
WR
PORT 0
A0-A7
D0-D7
A0-A7
D0-D7
A0-A7
D0-D7
A0-A7
D0-D7
MOVX Inst.
Address
Next Inst.
Address
MOVX Inst
.
MOVX Data
Address
MOVX Data out
A15-A8
A15-A8
Next Inst. Read
A15-A8
PORT 2
A15-A8
Figure 8: Data Memory Write with Stretch Value = 0
Last Cycle
of Previous
Instruction
First
Second
Third
Machine Cycle Machine Cycle Machine Cycle
MOVX instruction cycle
Next Instruction
Machine Cycle
C1 C2 C3 C4 C1 C2 C3 C4 C1 C2 C3 C4 C1 C2 C3 C4 C1 C2 C3 C4
CLK
ALE
PSEN
WR
PORT 0
A0-A7
D0-D7
A0-A7
D0-D7
A0-A7
D0-D7
A0-A7
D0-D7
MOVX Inst.
Address
Next Inst.
Address
MOVX Data
Address
MOVX Data out
MOVX Inst.
Next Inst.
Read
A15-A8
A15-A8
A15-A8
PORT 2
A15-A8
Figure 9: Dada Memory Write with Stretch Value = 1
- 39 -
Publication Release Date: February 1, 2007
Revision A8
WINBOND [ WINBOND ]
