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| 型号： | SAK-XC167CI-16F40F |
| 厂商： | INFINEON TECHNOLOGIES AG |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 16-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP144 |
| 封装： | 0.50 MM PITCH, GREEN, PLASTIC, TQFP-144 |
| 文件页数： | 47/90页 |
| 文件大小： | 1187K |
| 代理商： | SAK-XC167CI-16F40F |
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XC167CI-16F
Derivatives
Functional Description
Data Sheet
49
V1.3, 2006-08
3.15
Watchdog Timer
The Watchdog Timer represents one of the fail-safe mechanisms which have been
implemented to prevent the controller from malfunctioning for longer periods of time.
The Watchdog Timer is always enabled after a reset of the chip, and can be disabled
until the EINIT instruction has been executed (compatible mode), or it can be disabled
and enabled at any time by executing instructions DISWDT and ENWDT (enhanced
mode). Thus, the chip’s start-up procedure is always monitored. The software has to be
designed to restart the Watchdog Timer before it overflows. If, due to hardware or
software related failures, the software fails to do so, the Watchdog Timer overflows and
generates an internal hardware reset and pulls the RSTOUT pin low in order to allow
external hardware components to be reset.
The Watchdog Timer is a 16-bit timer, clocked with the system clock divided by
2/4/128/256. The high byte of the Watchdog Timer register can be set to a prespecified
reload value (stored in WDTREL) in order to allow further variation of the monitored time
interval. Each time it is serviced by the application software, the high byte of the
Watchdog Timer is reloaded and the low byte is cleared. Thus, time intervals between
13
s and 419 ms can be monitored (@ 40 MHz).
The default Watchdog Timer interval after reset is 3.28 ms (@ 40 MHz).
相关PDF资料 |
PDF描述 |
|---|---|
| SAF-XC167CI-16F20F | 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP144 |
| SAK-XC2298H-136F80L | 32-BIT, FLASH, 80 MHz, RISC MICROCONTROLLER, PQFP176 |
| SAK-XC2298H-200F100L | 32-BIT, FLASH, 100 MHz, RISC MICROCONTROLLER, PQFP176 |
| SAH-XC2298H-136F100L | 32-BIT, FLASH, 100 MHz, RISC MICROCONTROLLER, PQFP176 |
| SAF-XC2299H-200F100L | 32-BIT, FLASH, 100 MHz, RISC MICROCONTROLLER, PQFP176 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SAK-XC167CI-16F40F BB | 功能描述:16位微控制器 - MCU 16 BIT SNGL CHIP 5V 40MHz Flash RoHS:否 制造商:Texas Instruments 核心:RISC 处理器系列:MSP430FR572x 数据总线宽度:16 bit 最大时钟频率:24 MHz 程序存储器大小:8 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:VQFN-40 安装风格:SMD/SMT |
| SAKXC167CI16F40FBB | 制造商:Infineon Technologies AG 功能描述: |
| SAK-XC167CI-16F40FBB | 制造商:Infineon Technologies AG 功能描述: |
| SAKXC167CI16F40FBBTR | 制造商:Rochester Electronics LLC 功能描述: 制造商:Infineon Technologies AG 功能描述: |
| SAKXC167CI16F40FTR | 制造商:Infineon Technologies AG 功能描述:MCU 16-Bit XC166 CISC/DSP/RISC 128KB Flash 2.5V/5V 144-Pin TQFP T/R |
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