ST6262C datasheet(29/78 Pages) STMICROELECTRONICS

部件名	ST6262C

功能描述	8-BIT OTP/EPROM MCUs WITH A/D CONVERTER, SAFE RESET, AUTO-RELOAD TIMER AND EEPROM

PDF	78 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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29 / 78 page

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ST62T52C ST62T62C/E62C

DIGITAL WATCHDOG (Cont’d)

These instructions test the C bit and Reset the

MCU (i.e. disable the Watchdog) if the bit is set

(i.e. if the Watchdog is active), thus disabling the

Watchdog.

In all modes, a minimum of 28 instructions are ex-

ecuted after activation, before the Watchdog can

generate a Reset. Consequently, user software

should load the watchdog counter within the first

27 instructions following Watchdog activation

(software mode), or within the first 27 instructions

executed following a Reset (hardware activation).

It should be noted that when the GEN bit is low (in-

terrupts disabled), the NMI interrupt is active but

cannot cause a wake up from STOP/WAIT modes.

Figure 18. A typical circuit making use of the

EXERNAL STOP MODE CONTROL feature

Figure 19. Digital Watchdog Block Diagram

NMI

SWITCH

I/O

VR02002

RSFF

DATA BUS

VA00010

-2

-12

OSCILLATOR

RESET

WRITE

RESET

DB0

DB1.7

SET

LOAD

-2

SET

CLOCK

ST6262C 数据表(PDF) 29 Page - STMicroelectronics

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