at87f52-20qi ATMEL Corporation, at87f52-20qi Datasheet - Page 18

• Manufacturer Part Number: at87f52-20qi
• Description: At87f52 8-bit Microcontroller With 8k Bytes Quickflash
• Manufacturer: ATMEL Corporation

External Program Memory Read Cycle
External Data Memory Read Cycle
18
PORT 0
PORT 2
PORT 0
PORT 2
PSEN
PSEN
ALE
ALE
RD
A0 - A7 FROM RI OR DPL
t
LHLL
t
AVLL
t
AVLL
P2.0 - P2.7 OR A8 - A15 FROM DPH
t
LHLL
t
AVWL
Not
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