TS87C51RD2 ATMEL Corporation, TS87C51RD2 Datasheet - Page 67

• Manufacturer Part Number: TS87C51RD2
• Description: (TS8xC51Rx2) High Performance 8-bit Microcontroller
• Manufacturer: ATMEL Corporation

11.5.5
Figure 11-7. External Data Memory Write Cycle
11.5.6
4188E–8051–08/06
External Data Memory Write Cycle
External Data Memory Read Cycle
PORT 0
PORT 2
PSEN
ALE
WR
Table 11-9.
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
RHDX
AVWL
WHLH
WHLH
RLRH
RLDV
RHDZ
AVDV
LLDV
LLWL
LLWL
RLAZ
AC Parameters for a Variable Clock: derating formula
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
Clock
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
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
15
15
23
15
35
50
20
20
20
10
10
10
10
AT/TS8xC51Rx2
-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
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