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| AT89C51RC Datasheet, PDF (30/37 Pages) ATMEL Corporation – 8-bit Microcontroller with 32K Bytes Flash | |||
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External Program Memory Read Cycle
ALE
PSEN
PORT 0
PORT 2
tLHLL
tAVLL
tLLPL
tLLAX
A0 - A7
tPLAZ
tLLIV
tPLIV
tPXIZ
tPXIX
INSTR IN
tPLPH
tPXAV
tAVIV
A8 - A15
A0 - A7
A8 - A15
External Data Memory Read Cycle
ALE
tLHLL
PSEN
RD
PORT 0
PORT 2
tAVLL
tLLDV
tLLWL
tLLAX
tRLAZ
tRLRH
tRLDV
A0 - A7 FROM RI OR DPL
DATA IN
tAVWL
tAVDV
P2.0 - P2.7 OR A8 - A15 FROM DPH
tWHLH
tRHDZ
tRHDX
A0 - A7 FROM PCL
INSTR IN
A8 - A15 FROM PCH
30 AT89C51RC
1920BâMICROâ11/02
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