ST72124J View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

ST72124J

8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES

STMicroelectronics 

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ST72334J/N, ST72314J/N, ST72124J

RESET SEQUENCE MANAGER (Cont’d)

Internal Watchdog RESET

The RESET sequence generated by a internal

Watchdog counter overflow is shown in Figure 18.

Figure 18. Watchdog RESET Sequence

VDD

VDDnominal

VLVDf

Starting from the Watchdog counter underflow, the

device RESET pin acts as an output that is pulled

low during at least tDELAYmin.

RUN

DELAY

RESET

INTERNAL RESET FETCH

4096 CLOCK CYCLES VECTOR

tDE LAYmin

RUN

EXTERNAL RESET SOURCE

RESET PIN

WATCHDOG UNDERFLOW

WATCHDOG RESET

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