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參數(shù)資料
| 型號： | TS80C51RA2-VCE |
| 廠商： | International Rectifier |
| 英文描述： | High Performance 8-bit Microcontroller |
| 中文描述： | 高性能8位微控制器 |
| 文件頁數(shù)： | 47/85頁 |
| 文件大?。?/td> | 762K |
| 代理商： | TS80C51RA2-VCE |
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47
4188E–8051–08/06
AT/TS8xC51Rx2
Reset value XXXX X000
6.8.2
WDT during Power-down and Idle
In Power-down mode the oscillator stops, which means the WDT also stops. While in Power-
down mode the user does not need to service the WDT. There are 2 methods of exiting Power-
down mode: by a hardware reset or via a level activated external interrupt which is enabled prior
to entering Power-down mode. When Power-down is exited with hardware reset, servicing the
WDT should occur as it normally should whenever the TS80C51Rx2 is reset. Exiting Power-
down with an interrupt is significantly different. The interrupt is held low long enough for the
oscillator to stabilize. When the interrupt is brought high, the interrupt is serviced. To prevent the
WDT from resetting the device while the interrupt pin is held low, the WDT is not started until the
interrupt is pulled high. It is suggested that the WDT be reset during the interrupt service routine.
To ensure that the WDT does not overflow within a few states of exiting of powerdown, it is best
to reset the WDT just before entering powerdown.
In the Idle mode, the oscillator continues to run. To prevent the WDT from resetting the
TS80C51Rx2 while in Idle mode, the user should always set up a timer that will periodically exit
Idle, service the WDT, and re-enter Idle mode.
Bit
Number
Bit
Mnemonic
Description
7
T4
Reserved
Do not try to set or clear this bit.
6
T3
5
T2
4
T1
3
T0
2
S2
WDT Time-out select bit 2
1
S1
WDT Time-out select bit 1
0
S0
WDT Time-out select bit 0
S2
S1
S0Selected Time-out
0(2
14
- 1) machine cycles, 16.3 ms @ 12 MHz
1(2
15
- 1) machine cycles, 32.7 ms @ 12 MHz
0(2
16
- 1) machine cycles, 65.5 ms @ 12 MHz
1(2
17
- 1) machine cycles, 131 ms @ 12 MHz
0(2
18
- 1) machine cycles, 262 ms @ 12 MHz
1(2
19
- 1) machine cycles, 542 ms @ 12 MHz
0(2
20
- 1) machine cycles, 1.05 s @ 12 MHz
1(2
21
- 1) machine cycles, 2.09 s @ 12 MHz
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TS80C51RA2-VIB | High Performance 8-bit Microcontroller |
| TS80C51RA2-VIE | High Performance 8-bit Microcontroller |
| TS80C51RD2-LCA | High Performance 8-bit Microcontroller |
| TS80C51RD2-LCB | High Performance 8-bit Microcontroller |
| TS80C51RD2-LCE | High Performance 8-bit Microcontroller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TS80C51RA2-VCEB | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontrollers |
| TS80C51RA2-VCED | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontrollers |
| TS80C51RA2-VCER | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontrollers |
| TS80C51RA2-VCJB | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontrollers |
| TS80C51RA2-VCJD | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontrollers |
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