DS80C310_1 Datasheet, PDF (16/21 Pages) Dallas Semiconductor – High-Speed Micro

DS80C310
DATA MEMORY WRITE CYCLE
ALE
PSEN
WR
t_LLAX2
t_LLWL
t_AVLL
t_WLWH
t_WHLH
t_WHQX
PORT 0 ^INSTRUCTION
IN
PORT 2
ADDRESS
A0–A7
t_AVWL1
t_QVWX
DATA OUT
ADDRESS A8–A15 OUT
t_AVWL2
ADDRESS
A0–A7
DATA MEMORY WRITE WITH STRETCH=1
Last Cycle of
Previous
Instruction
First
Machine
Cycle
Second
Machine
Cycle
MOVX Instruction
Third
Machine
Cycle
C1 C2 C3 C4 C1 C2 C3 C4 C1 C2 C3 C4 C1 C2 C3 C4
Next
Instruction
Machine Cycle
C1 C2 C3 C4
CLK
ALE
PSEN
WR
PORT 0
A0–A7
D0–D7
A0–A7
D0–D7
A0–A7
PORT 2
MOVX
Instruction
Address
MOVX
Instruction
Next Instr.
Address
Next
Instruction
Read
MOVX
Data
Address
A8–A15
A8–A15
D0–D7
MOVX Data
A8–A15
A0–A7
D0–D7
A8–A15
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