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參數(shù)資料
| 型號： | Q67121-C942 |
| 廠商： | SIEMENS AG |
| 英文描述： | 16-Bit CMOS Single-Chip Microcontroller |
| 中文描述： | 16位CMOS單芯片微控制器 |
| 文件頁數(shù)： | 51/69頁 |
| 文件大?。?/td> | 1124K |
| 代理商： | Q67121-C942 |
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Semiconductor Group
51
1997-07-01
C515C
Oscillator Watchdog
The oscillator watchdog unit serves for four 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.
–
Restart from the hardware power down mode.
If the hardware power down mode is terminated the oscillator watchdog has to control the
correct start-up of the on-chip oscillator and to restart the program. The oscillator watchdog
function is only part of the complete hardware power down sequence; however, the watchdog
works identically to the monitoring function.
–
Control of external wake-up from software power-down mode
When the software power-down mode is left by a low level at the P3.2/INT0 pin, 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 |
|---|---|
| Q67121-C946 | 16-Bit CMOS Single-Chip Microcontroller |
| Q67121-C967 | 16-Bit CMOS Single-Chip Microcontroller |
| Q67126-C2001 | 8-Bit CMOS Microcontroller |
| Q67126-C2042 | 8-Bit CMOS Microcontroller |
| Q67127-D970 | 8-Bit CMOS Microcontroller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| Q67121-C946 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:16-Bit CMOS Single-Chip Microcontroller |
| Q67121-C967 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:16-Bit CMOS Single-Chip Microcontroller |
| Q67126-C2001 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller |
| Q67126-C2042 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller |
| Q67126-C2088 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:IC-SM-CAN CONTROLLER |
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