89C52 ATMEL Corporation, 89C52 Datasheet - Page 18

• Manufacturer Part Number: 89C52
• Description: Search ---> AT89C52
• Manufacturer: ATMEL Corporation

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External Program Memory Read Cycle
External Data Memory Read Cycle
4-78
PORT 0
PORT 2
PORT 0
PORT 2
PSEN
PSEN
ALE
ALE
RD
A0 - A7 FROM RI OR DPL
AT89C52
t
LHLL
t
AVLL
t
AVLL
P2.0 - P2.7 OR A8 - A15 FROM DPH
t
LHLL
t
AVWL
t
LLAX
t
A0 - A7
AVDV
t
LLAX
t
LLWL
t
t
RLAZ
LLPL
t
t
LLDV
AVIV
A8 - A15
t
PLAZ
t
RLRH
t
RLDV
DATA IN
t
t
LLIV
PLIV
INSTR IN
t
PXIX
t
PXIZ
t
A0 - A7 FROM PCL
t
t
RHDZ
t
t
PLPH
PXAV
RHDX
WHLH
A8 - A15 FROM PCH
A8 - A15
A0 - A7
INSTR IN