AT87F55WD ATMEL [ATMEL Corporation], AT87F55WD Datasheet - Page 22
![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: 22 of 26
- Download datasheet (235Kb)
External Data Memory Write Cycle
External Clock Drive Waveforms
External Clock Drive
22
Symbol
1/t
t
t
t
t
t
CLCL
CHCX
CLCX
CLCH
CHCL
CLCL
0.45V
V
CC
PORT 0
PORT 2
- 0.5V
Parameter
Oscillator Frequency
Clock Period
High Time
Low Time
Rise Time
Fall Time
PSEN
ALE
WR
AT87F55WD
0.2 V
0.7 V
CC
- 0.1V
A0 - A7 FROM RI OR DPL
CC
t
t
CHCX
LHLL
t
AVLL
P2.0 - P2.7 OR A8 - A15 FROM DPH
t
AVWL
t
LLAX
t
t
QVWX
LLWL
Min
t
DATA OUT
30
12
12
CLCX
t
0
t
QVWH
WLWH
t
CLCH
t
WHQX
t
t
A0 - A7 FROM PCL
CLCL
WHLH
A8 - A15 FROM PCH
Max
33
5
5
t
CHCX
INSTR IN
Units
MHz
ns
ns
ns
ns
ns
t
CHCL
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