参数资料
型号: SAB-C505-2R20M
厂商: INFINEON TECHNOLOGIES AG
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 20 MHz, MICROCONTROLLER, PQFP44
封装: PLASTIC, MQFP-44
文件页数: 47/88页
文件大小: 1013K
代理商: SAB-C505-2R20M
C505/C505C/C505A/C505CA
Data Sheet
47
12.00
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, in order to allow the
oscillator to stabilize, executes a final reset phase of typ. 1 ms; then the oscillator watchdog
reset is released and the part starts program execution from address 0000H 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
When the power-down mode is left by a low level at the P3.2/INT0 pin or the P4.1/RXDC 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 program execution by processing a power down
interrupt after a final delay of typ. 1 ms in order to allow the on-chip oscillator to stabilize.
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相关代理商/技术参数
参数描述
SAB-C505-2RM 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller
SAB-C505A-4EM 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller
SAB-C505A-4EM-BA 制造商:Rochester Electronics LLC 功能描述:- Bulk
SAB-C505C-2RM 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller
SAB-C505CA-4EM 制造商:Infineon Technologies 功能描述:Bulk