IC89E54 Datasheet, PDF (30/36 Pages) Integrated Circuit Solution Inc – 8-BITS SINGLE MICROCONTROLLER with 16/32/64-Kbytes of FLASH, 256 byte +512 byte RAM

IC89E54/58/64
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 19. 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 20. External Data Memory Read Cycle
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Integrated C ircuitSolution Inc.
MC012-0C 11/16/2001