AT89C51RB2/RC2
Standard
Clock
X Parameter for - X Parameter for -
Symbol
TRLRH
TWLWH
TRLDV
TRHDX
TRHDZ
TLLDV
Type
Min
X2 Clock
3 T - x
3 T - x
2.5 T - x
x
M Range
25
25
30
0
L Range
25
25
30
0
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
6 T - x
6 T - x
5 T - x
x
Min
Max
Min
Max
Max
Max
Min
2 T - x
8 T - x
9 T - x
3 T - x
3 T + x
4 T - x
T - x
T - x
25
45
65
30
30
30
20
20
15
0
25
45
65
30
30
30
20
20
15
0
4T -x
TAVDV
TLLWL
TLLWL
TAVWL
TQVWX
TQVWH
TWHQX
TRLAZ
TWHLH
TWHLH
4.5 T - x
1.5 T - x
1.5 T + x
2 T - x
0.5 T - x
3.5 T - x
0.5 T - x
x
Max
Min
Min
Min
7 T - x
T - x
Min
Max
Min
x
T - x
0.5 T - x
0.5 T + x
20
20
20
20
Max
T + x
External Data Memory Write
Cycle
TWHLH
ALE
PSEN
WR
TLLWL
TWLWH
TQVWX
TWHQX
TLLAX
A0-A7
TQVWH
DATA OUT
PORT 0
TAVWL
ADDRESS
OR SFR-P2
PORT 2
ADDRESS A8-A15 OR SFR P2
115
4180C–8051–12/03
ATMEL [ ATMEL ]
