ST6200C datasheet(41/100 Pages) STMICROELECTRONICS

部件名	ST6200C

功能描述	8-bit MCUs with A/D converter, two timers, oscillator safeguard & safe reset

PDF	100 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

41 / 100 page

ST6200C ST6201C ST6203C

Doc ID 4563 Rev 5

41/100

8 ON-CHIP PERIPHERALS

8.1 WATCHDOG TIMER (WDG)

8.1.1 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.

8.1.2 Main Features

■ Programmable timer (64 steps of 3072 clock

cycles)

■ Software reset

■ Reset (if watchdog activated) when the SR bit

reaches zero

■ Hardware

or software watchdog activation

selectable by option bit (Refer to the option

bytes section)

Figure 25. Watchdog Block Diagram

RESET

7-BIT DOWNCOUNTER

fint /12

CLOCK DIVIDER

WATCHDOG REGISTER (WDGR)

÷ 256

bit 0

bit 7

ST6200C 数据表(PDF) 41 Page - STMicroelectronics

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