IC80C51 Datasheet, PDF (41/44 Pages) Integrated Circuit Solution Inc – CMOS SINGLE CHIP 8-BIT MICROCONTROLLER

IC80C51
IC80C31
TIMING WAVEFORMS
ALE
PSEN
PORT 0
PORT 2
tLHLL
tLLPL
tAVLL
tPLPH
tPLIV
tLLAX
tPLAZ
tPXIX
A7-A0
INSTR IN
tLLIV
tAVIV
A15-A8
tPXIZ
A7-A0
A15-A8
Figure 28. External Program Memory Read Cycle
ALE
PSEN
RD
PORT 0
PORT 2
tLLDV
tLLWL
tWHLH
tRLRH
tAVLL
tRLAZ
tLLAX
tRLDV _tRHDX
A7-A0 FROM RI OR DPL
DATA IN
tAVWL
tAVDV
A15-A8 FROM DPH
tRHDZ
A7-A0 FROM PCL
INSTR IN
A15-A8 FROM PCH
Figure 29. External Data Memory Read Cycle
Integrated Circuit Solution Inc.
41
MC001-0B