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参数资料
| 型号： | SAF-C505CA-4E20M |
| 厂商： | INFINEON TECHNOLOGIES AG |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, OTPROM, 20 MHz, MICROCONTROLLER, PQFP44 |
| 封装： | PLASTIC, MQFP-44 |
| 文件页数： | 47/88页 |
| 文件大小： | 1013K |
| 代理商： | SAF-C505CA-4E20M |
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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.
相关PDF资料 |
PDF描述 |
|---|---|
| SAH-C505CA-L16M | 8-BIT, 16 MHz, MICROCONTROLLER, PQFP44 |
| SAK-XC161CS-32F40F | 16-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP144 |
| SAK-XC161CS-32F20F | 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP144 |
| SAK-XC164CS-8F40F | 16-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP100 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SAF-C505CA-4EM | 制造商:Infineon Technologies AG 功能描述:SP000106394_8BIT OTP_TR_RO |
| SAF-C505CA-4EM CA | 功能描述:8位微控制器 -MCU 8 BIT OTP RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| SAFC505CA4EM-BB | 制造商:Infineon Technologies AG 功能描述:MCU 8-Bit C500 8051 CISC 32KB EPROM 5V 44-Pin MQFP Bulk |
| SAFC505CA4EMCA | 制造商:Infineon Technologies AG 功能描述: |
| SAFC505CA4EMCA TR | 制造商:Infineon Technologies 功能描述:MCU 8-Bit C500 8051 CISC 32KB EPROM 5V 44-Pin MQFP T/R |
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