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AT89S52-24SC Datasheet(PDF) 31 Page - ATMEL Corporation

Part No. AT89S52-24SC
Description  8-bit Microcontroller with 8K Bytes In-System Programmable Flash
Download  39 Pages
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Maker  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
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AT89S52-24SC Datasheet(HTML) 31 Page - ATMEL Corporation

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31
1919C–MICRO–3/05
AT89S52
29. External Program Memory Read Cycle
30. External Data Memory Read Cycle
t
LHLL
t
LLIV
t
PLIV
t
LLAX
t
PXIZ
t
PLPH
t
PLAZ
t
PXAV
t
AVLL
t
LLPL
t
AVIV
t
PXIX
ALE
PSEN
PORT 0
PORT 2
A8 - A15
A0 - A7
A0 - A7
A8 - A15
INSTR IN
t
LHLL
t
LLDV
t
LLWL
t
LLAX
t
WHLH
t
AVLL
t
RLRH
t
AVDV
t
AVWL
t
RLAZ
t
RHDX
t
RLDV
t
RHDZ
A0 - A7 FROM RI OR DPL
ALE
PSEN
RD
PORT 0
PORT 2
P2.0 - P2.7 OR A8 - A15 FROM DPH
A0 - A7 FROM PCL
A8 - A15 FROM PCH
DATA IN
INSTR IN


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