at89c51ic2-slsim ATMEL Corporation, at89c51ic2-slsim Datasheet - Page 136

• Manufacturer Part Number: at89c51ic2-slsim
• Description: At89c51ic2 8-bit Flash Microcontroller With 2-wire Interface
• Manufacturer: ATMEL Corporation

External Data Memory Write
Cycle
136
AT89C51IC2
PORT 0
PORT 2
PSEN
ALE
WR
OR SFR-P2
ADDRESS
Symbol
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
WLWH
QVWH
WHQX
QVWX
WHLH
WHLH
RLRH
RLDV
RHDX
RHDZ
AVDV
AVWL
LLDV
LLWL
LLWL
RLAZ
Type
A0-A7
Max
Max
Max
Max
Max
Max
Max
Min
Min
Min
Min
Min
Min
Min
Min
Min
T
T
LLAX
AVWL
T
LLWL
Standard
Clock
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
T + x
T - x
T - x
T - x
x
x
ADDRESS A8-A15 OR SFR P2
X2 Clock
T
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
QVWX
3 T - x
3 T - x
2 T - x
4T -x
T - x
x
x
T
X Parameter for -
QVWH
T
DATA OUT
WLWH
M Range
25
25
30
25
45
65
30
30
30
20
20
15
20
20
0
0
T
WHLH
X Parameter for -
L Range
25
25
30
25
45
65
30
30
30
20
20
15
20
20
T
0
0
WHQX
4301D–8051–02/08
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns