ST72141K View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST72141K

8-BIT MCU WITH ELECTRIC-MOTOR CONTROL, ADC, 16-BIT TIMERS, SPI INTERFACE

STMicroelectronics 

ST72141K

RESET MANAGER (Cont’d)

Internal Low Voltage Detection RESET (option)

Two different RESET sequences caused by the in-

ternal LVD circuitry can be distinguished:

- LVD Power-On RESET

- Voltage Drop RESET

Figure 13. LVD RESET Sequences

VDDnominal

VLVDr

VDD

In the second sequence, a “delay” phase is used

to keep the device in RESET state until VDD rises

up to VLVDr (see Figure 13).

VDD

VDDnominal

VLVDr

VLVDf

RUN

POW ER-

OFF

RESET

INTERNAL RESET FETCH

4096 CLOCK CYCLES VECTOR

RUN

EXTERNAL RESET SOURCE

RESET PIN

WATCHDOG RESET

DELAY

RESET

INTERNAL RESET FETCH

4096 CLOCK CYCLES VECTOR

RUN

EXTERNAL RESET SOURCE

RESET PIN

WATCHDOG RESET

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