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參數(shù)資料
| 型號： | SAF-C502-2R20N |
| 廠商： | SIEMENS A G |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-Bit CMOS Microcontroller |
| 中文描述： | 8-BIT, MROM, 20 MHz, MICROCONTROLLER, PQCC44 |
| 文件頁數(shù)： | 29/46頁 |
| 文件大?。?/td> | 567K |
| 代理商： | SAF-C502-2R20N |
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Semiconductor Group
28
C502
– Starting and refreshing the WDT
Table 13
gives an overview how to start and refresh the WDT. The mentioned bits are located in
SFR WDCON.
Table 13
Starting and Refreshing the WDT
– Watchdog reset and watchdog status flag (WDTS)
If the software fails to clear the watchdog in time, an internally generated watchdog reset is
entered at the counter state 7FFCH. The duration of the reset signal then depends on the
prescaler selection (either 8 or 128 cycles). This internal reset differs from an external one in so
far as the Watchdog Timer is not disabled and bit WDTS (SFR WDCON) is set. The WDTS is a
flip-flop, which is set by a Watchdog Timer reset and can be cleared by an external hardware
reset. Bit WDTS allows the software to examine from which source the reset was activated. The
bit WDTS can also be cleared by software.
Function
Starting WD
Example
Remarks
Cannot be stopped during active mode of the
device. WDT is halted during idle mode, power
down mode or the oscillator watchdog reset is
active.
SETB
SWDT
Refreshing WD
SETB
SETB
WDT
SWDT
Double instruction sequence
(setting bit WDT and SWDT consecutively) to
increase system security.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SAF-C502-2R20P | 8-Bit CMOS Microcontroller |
| SAF-C502-2RN | 8-Bit CMOS Microcontroller |
| SAF-C502-2RP | 8-Bit CMOS Microcontroller |
| SAF-C502-L20N | 8-Bit CMOS Microcontroller |
| SAF-C502-L20P | 8-Bit CMOS Microcontroller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAF-C502-2R20P | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller |
| SAF-C502-2RN | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller |
| SAF-C502-2RP | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller |
| SAF-C502-L20N | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller |
| SAF-C502-L20P | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller |
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