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Número de pieza
componentes Descripción
80C54 Ver la hoja de datos (PDF) - Atmel Corporation
Número de pieza
componentes Descripción
Fabricante
80C54
8-bit CMOS Microcontroller 16/32 Kbytes ROM/OTP
Atmel Corporation
80C54 Datasheet PDF : 62 Pages
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AT/TS8xC54/8X2
Table 19-10.
AC Parameters for a Variable Clock: derating formula
Standard
Symbol
Type
Clock
X2 Clock
-M
-V
-L
T
RLRH
Min
6T-x
3T-x
20
15
25
T
WLWH
Min
6T-x
3T-x
20
15
25
T
RLDV
Max
5T-x
2.5 T - x
25
23
30
T
RHDX
Min
x
x
0
0
0
T
RHDZ
Max
2T-x
T-x
20
15
25
T
LLDV
Max
8T-x
4T -x
40
35
45
T
AVDV
Max
9T-x
4.5 T - x
60
50
65
T
LLWL
Min
3T-x
1.5 T - x
25
20
30
T
LLWL
Max
3T+x
1.5 T + x
25
20
30
T
AVWL
Min
4T-x
2T-x
25
20
30
T
QVWX
Min
T-x
0.5 T - x
15
10
20
T
QVWH
Min
7T-x
3.5 T - x
15
10
20
T
WHQX
Min
T-x
0.5 T - x
10
8
15
T
RLAZ
Max
x
x
0
0
0
T
WHLH
Min
T-x
0.5 T - x
15
10
20
T
WHLH
Max
T+x
0.5 T + x
15
10
20
19.5.5 External Data Memory Write Cycle
Figure 19-7.
External Data Memory Write Cycle
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ALE
PSEN
WR
PORT 0
PORT 2
ADDRESS
OR SFR-P2
T
WHLH
T
LLWL
T
WLWH
T
LLAX
A0-A7
T
AVWL
T
QVWX
T
QVWH
DATA OUT
ADDRESS A8-A15 OR SFR P2
T
WHQX
51
4431E–8051–04/06
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