TS80C54 ATMEL [ATMEL Corporation], TS80C54 Datasheet - Page 51
TS80C54
Manufacturer Part Number
TS80C54
Description
8-bit CMOS Microcontroller 16/32 Kbytes ROM/OTP
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.TS80C54.pdf
(62 pages)
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19.5.5
4431E–8051–04/06
External Data Memory Write Cycle
PORT 0
PORT 2
PSEN
ALE
WR
Table 19-10. AC Parameters for a Variable Clock: derating formula
Figure 19-7. External Data Memory Write Cycle
OR SFR-P2
ADDRESS
Symbol
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
WLWH
QVWX
QVWH
WHQX
WHLH
WHLH
RLRH
RHDX
RHDZ
AVDV
AVWL
RLDV
LLWL
LLWL
RLAZ
LLDV
Type
Max
Max
Max
Max
Max
Max
Max
Min
Min
Min
Min
Min
Min
Min
Min
Min
A0-A7
T
T
LLAX
AVWL
Standard
3 T + x
6 T - x
6 T - x
5 T - x
2 T - x
8 T - x
9 T - x
3 T - x
4 T - x
7 T - x
Clock
T
T + x
T - x
T - x
T - x
LLWL
x
x
ADDRESS A8-A15 OR SFR P2
X2 Clock
1.5 T + x
0.5 T + x
2.5 T - x
4.5 T - x
1.5 T - x
0.5 T - x
3.5 T - x
0.5 T - x
0.5 T - x
3 T - x
3 T - x
2 T - x
4T -x
T - x
x
x
T
QVWX
T
-M
20
20
25
20
40
60
25
25
25
15
15
10
15
15
0
0
QVWH
T
DATA OUT
WLWH
AT/TS8xC54/8X2
15
15
23
15
35
50
20
20
20
10
10
10
10
-V
0
8
0
T
WHLH
25
25
30
25
45
65
30
30
30
20
20
15
20
20
-L
0
0
T
WHQX
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
51
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