AT87F55WD ATMEL [ATMEL Corporation], AT87F55WD Datasheet - Page 21
![no-image](/images/no-image-200.jpg)
AT87F55WD
Manufacturer Part Number
AT87F55WD
Description
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT87F55WD.pdf
(26 pages)
- Current page: 21 of 26
- Download datasheet (235Kb)
External Program Memory Read Cycle
External Data Memory Read Cycle
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
t
P2.0 - P2.7 OR A8 - A15 FROM DPH
LHLL
t
AVWL
t
LLAX
A0 - A7
t
AVDV
t
LLAX
t
LLWL
t
t
LLPL
RLAZ
t
t
AVIV
LLDV
A8 - A15
t
PLAZ
t
RLRH
t
RLDV
DATA IN
t
t
PLIV
LLIV
INSTR IN
t
PXIX
t
PXIZ
t
t
t
A0 - A7 FROM PCL
RHDZ
t
PLPH
PXAV
t
RHDX
WHLH
A8 - A15 FROM PCH
A8 - A15
A0 - A7
INSTR IN
21
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