参数资料
型号: ST72311N4T6/XXX
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP64
封装: PLASTIC, TQFP-64
文件页数: 25/92页
文件大小: 624K
代理商: ST72311N4T6/XXX
31/92
ST72311
4.2 WATCHDOG TIMER (WDG)
4.2.1 Introduction
The Watchdog timer is used to detect the occur-
rence of a software fault, usually generated by ex-
ternal interference or by unforeseen logical condi-
tions, which causes the application program to
abandon its normal sequence. The Watchdog cir-
cuit generates an MCU reset on expiry of a pro-
grammed time period, unless the program refresh-
es the counter’s contents before the T6 bit be-
comes cleared.
4.2.2 Main Features
s
Programmable timer (64 increments of 12288
CPU cycles)
s
Programmable reset
s
Reset (if watchdog activated) after a HALT
instruction or when the T6 bit reaches zero
s
Hardware Watchdog selectable by option byte.
s
Watchdog Reset indicated by status flag (in
versions with Safe Reset option only)
Figure 21. Watchdog Block Diagram
RESET
WDGA
7-BIT DOWNCOUNTER
fCPU
T6
T0
CLOCK DIVIDER
WATCHDOG CONTROL REGISTER (CR)
÷12288
T1
T2
T3
T4
T5
31
相关PDF资料
PDF描述
ST72311J2B6/XXX 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP42
ST72311N2T3/XXX 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP64
ST72321BAR7T6 MICROCONTROLLER, QFP64
ST72321BR7T3 MICROCONTROLLER, QFP64
ST72321M9T3/XXX 8-BIT, MROM, MICROCONTROLLER, PQFP80
相关代理商/技术参数
参数描述
ST72311N5B6 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller
ST72311N6B6 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller
ST72311R 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCU WITH NESTED INTERRUPTS, EEPROM, ADC, 16-BIT TIMERS, 8-BIT PWM ART, SPI, SCI, CAN INTERFACES
ST72311R4Q6 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller
ST72311R5Q6 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller