ST62T08C datasheet(25/70 Pages) STMICROELECTRONICS

部品番号	ST62T08C

部品情報	8-BIT OTP/EPROM MCUs WITH A/D CONVERTER, OSCILLATOR SAFEGUARD, SAFE RESET AND 20 PINS

PDF	70 Pages

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メーカー	STMICROELECTRONICS [STMicroelectronics]

ホームページ	http://www.st.com

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ST62T08C/T09C ST62T10C/T20C/E20C

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

DB 1.7

SET

LOAD

-2

SET

CLOCK

ST62T08C データシート(PDF) 25 Page - STMicroelectronics

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