at83c5122 ATMEL Corporation, at83c5122 Datasheet - Page 196

• Manufacturer Part Number: at83c5122
• Description: At83c5123 C51 Microcontroller With Usb And Smart Card Reader Interfaces
• Manufacturer: ATMEL Corporation

External Data Memory Write
Cycle
196
AT8xC5122/23
PORT 0
PORT 2
PSEN
ALE
WR
Table 117. AC Parameters for a Variable Clock
(warning x value differ from AT89C51RD2)
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
RHDX
RHDZ
AVWL
RLRH
RLDV
AVDV
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
3T + x
7 T - x
6T - x
6T - x
5T - x
2T - x
8T - x
9T - x
3T - x
4T - x
T - x
T - x
T - x
T - x
x
x
ADDRESS A8-A15 OR SFR P2
T
QVWX
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
QVWH
T
DATA OUT
WLWH
X parameter
20
20
25
20
40
60
25
25
25
15
25
10
15
15
0
0
T
WHLH
4202E–SCR–06/06
T
Units
WHQX
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns