參數(shù)資料
型號(hào): T89C51RB2-SLBIM
廠商: Atmel Corp.
英文描述: 8-bit Microcontroller with 16 Kbytes/ 32 Kbytes FLASH
中文描述: 8位微控制器,帶有16字節(jié)/ 32千字節(jié)閃存
文件頁數(shù): 76/170頁
文件大?。?/td> 1927K
代理商: T89C51RB2-SLBIM
76
A/T89C51CC01
4129L–CAN–08/05
Watchdog Programming
The three lower bits (S0, S1, S2) located into WDTPRG register permit to program the
WDT duration.
Table 52.
Machine Cycle Count
To compute WD Time-Out, the following formula is applied:
Note:
Svalue represents the decimal value of (S2 S1 S0)
The following table outlines the time-out value for Fosc
XTAL
= 12 MHz in X1 mode
Table 53.
Time-Out Computation
S2
S1
S0
Machine Cycle Count
0
0
0
2
14
- 1
0
0
1
2
15
- 1
0
1
0
2
16
- 1
0
1
1
2
17
- 1
1
0
0
2
18
- 1
1
0
1
2
19
- 1
1
1
0
2
20
- 1
1
1
1
2
21
- 1
S2
S1
S0
Fosc = 12 MHz
Fosc = 16 MHz
Fosc = 20 MHz
0
0
0
16.38 ms
12.28 ms
9.82 ms
0
0
1
32.77 ms
24.57 ms
19.66 ms
0
1
0
65.54 ms
49.14 ms
39.32 ms
0
1
1
131.07 ms
98.28 ms
78.64 ms
1
0
0
262.14 ms
196.56 ms
157.28 ms
1
0
1
524.29 ms
393.12 ms
314.56 ms
1
1
0
1.05 s
786.24 ms
629.12 ms
1
1
1
2.10 s
1.57 s
1.25 s
FTime
Out
F
×
12
2
14
2
Svalue
(
)
1
(
)
×
----------------------------------------------------------------
=
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參數(shù)描述
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