參數(shù)資料
型號: ST62T03CM6E
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDSO16
封裝: 0.300 INCH, LEAD FREE, PLASTIC, SOP-16
文件頁數(shù): 37/100頁
文件大?。?/td> 1440K
代理商: ST62T03CM6E
ST6200C/ST6201C/ST6203C
41/100
9 ON-CHIP PERIPHERALS
9.1 WATCHDOG TIMER (WDG)
9.1.1 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 SR bit be-
comes cleared.
9.1.2 Main Features
s
Programmable timer (64 steps of 3072 clock
cycles)
s
Software reset
s
Reset (if watchdog activated) when the SR bit
reaches zero
s
Hardware or software watchdog activation
selectable by option bit (Refer to the option
bytes section)
Figure 25. Watchdog Block Diagram
RESET
C
7-BIT DOWNCOUNTER
fint /12
SR
T0
CLOCK DIVIDER
WATCHDOG REGISTER (WDGR)
÷ 256
T1
T2
T3
T4
T5
bit 0
bit 7
1
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