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參數(shù)資料
| 型號： | SAFC164CM |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 英文描述： | 16-Bit Single-Chip Microcontrol ler |
| 中文描述： | 16位單芯片Microcontrol萊爾 |
| 文件頁數(shù)： | 33/79頁 |
| 文件大?。?/td> | 1314K |
| 代理商： | SAFC164CM |
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C164CI/SI
C164CL/SL
Data Sheet
29
V2.0, 2001-05
Oscillator Watchdog
The Oscillator Watchdog (OWD) monitors the clock signal generated by the on-chip
oscillator (either with a crystal or via external clock drive). For this operation the PLL
provides a clock signal which is used to supervise transitions on the oscillator clock. This
PLL clock is independent from the XTAL1 clock. When the expected oscillator clock
transitions are missing the OWD activates the PLL Unlock/OWD interrupt node and
supplies the CPU with the PLL clock signal. Under these circumstances the PLL will
oscillate with its basic frequency.
In direct drive mode the PLL base frequency is used directly (
f
CPU
= 2
…
5 MHz).
In prescaler mode the PLL base frequency is divided by 2 (
f
CPU
= 1
…
2.5 MHz).
Note: The CPU clock source is only switched back to the oscillator clock after a
hardware reset.
The oscillator watchdog can be disabled
by setting bit OWDDIS in register SYSCON.
In this case (OWDDIS =
‘
1
’
) the PLL remains idle and provides no clock signal, while the
CPU clock signal is derived directly from the oscillator clock or via prescaler or SDD. Also
no interrupt request will be generated in case of a missing oscillator clock.
Note: At the end of a reset bit OWDDIS reflects the inverted level of pin RD at that time.
Thus the oscillator watchdog may also be disabled via hardware by (externally)
pulling the RD line low upon a reset, similar to the standard reset configuration via
PORT0.
相關PDF資料 |
PDF描述 |
|---|---|
| SAFC164SI | 16-Bit Single-Chip Microcontroller |
| SAFC164SL | 16-Bit Single-Chip Microcontroller |
| SAK-C164CL-6R25M | 16-Bit Single-Chip Microcontroller |
| SAK-C164CI-8R25M | 16-Bit Single-Chip Microcontroller |
| SAK-C164CI-8RM | 16-Bit Single-Chip Microcontroller |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SAF-C164CM | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:16-Bit Single-Chip Microcontrol ler |
| SAF-C164CM-4EF | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:16-Bit Single-Chip Microcontrol ler |
| SAF-C164CM-4EF AB | 功能描述:16位微控制器 - MCU 16-Bit Sngl-Chip 5V 20MHz OTP RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時鐘頻率:24 MHz 程序存儲器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風格:SMD/SMT |
| SAFC164CM4EF AB TR | 制造商:Infineon Technologies AG 功能描述: |
| SAFC164CM4EFABX | 制造商:Infineon Technologies AG 功能描述:MCU 16-Bit C166 CISC/RISC 32KB EPROM 5V 64-Pin TQFP |
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