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| 型號： | SAB-C540U-EN |
| 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, OTPROM, 12 MHz, MICROCONTROLLER, PQCC44 |
| 文件頁數(shù)： | 35/65頁 |
| 文件大?。?/td> | 427K |
| 代理商： | SAB-C540U-EN |
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Semiconductor Group
35
1997-10-01
C540U
C541U
Oscillator Watchdog
The oscillator watchdog unit serves for three functions:
–
Monitoring of the on-chip oscillator's function
The watchdog supervises the on-chip oscillator's frequency; if it is lower than the frequency
of the auxiliary RC oscillator in the watchdog unit, the internal clock is supplied by the RC
oscillator and the device is brought into reset; if the failure condition disappears (i.e. the on-
chip oscillator has a higher frequency than the RC oscillator), the part executes a final reset
phase of typ. 1 ms in order to allow the oscillator to stabilize; then the oscillator watchdog reset
is released and the part starts program execution again.
–
Fast internal reset after power-on
The oscillator watchdog unit provides a clock supply for the reset before the on-chip oscillator
has started. The oscillator watchdog unit also works identically to the monitoring function.
–
Control of external wake-up from software power-down mode
(description see chapter 9)
When the power-down mode is left by a low level at the INT0 pin or by the USB, the oscillator
watchdog unit assures that the microcontroller resumes operation (execution of the power-
down wake-up interrupt) with the nominal clock rate. In the power-down mode the RC
oscillator and the on-chip oscillator are stopped. Both oscillators are started again when
power-down mode is released. When the on-chip oscillator has a higher frequency than the
RC oscillator, the microcontroller starts operation after a final delay of typ. 1 ms in order to
allow the on-chip oscillator to stabilize.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SAB-C540U-EP | 8-Bit CMOS Microcontroller |
| SAB-C541U-1EP | 8-Bit CMOS Microcontroller |
| SAB-R2000A | MOSFET N-CH 300V 73A TO-264AA |
| SAB-R2000A-12-A | HIGH PERFORMANCE 32-BIT RISC MICROPROCESSOR |
| SAB-R2000A-16-A | MOSFET N-CH 200V 90A TO-264AA |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAB-C540U-EP | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller |
| SAB-C-541U-1EN | 制造商:Infineon Technologies AG 功能描述: |
| SAB-C541U-1EN | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| SABC541U1ENCA | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| SAB-C541U-1EP | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller |
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