ST72C314N4 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

ST72C314N4

8-bit MCU for automotive with single voltage Flash/ROM memory, ADC, 16-bit timers, SPI, SCI interfaces

STMicroelectronics 

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ST72334xx-Auto, ST72314xx-Auto, ST72124Jx-Auto

8 SUPPLY, RESET AND CLOCK MANAGEMENT

The ST72334J/N-Auto, ST72314J/N-Auto and

ST72124J-Auto microcontrollers include a range

of utility features for securing the application in crit-

ical situations (for example, in case of a power

brown-out), and reducing the number of external

components. An overview is shown in Figure 11.

See Section 15 "ELECTRICAL CHARACTERIS-

TICS" on page 108 for more details.

■ Multi-Oscillator (MO)

– 4 Crystal/Ceramic resonator oscillators

– 1 External RC oscillator

– 1 Internal RC oscillator

■ Clock Security System (CSS)

– Clock Filter

– Backup Safe Oscillator

Main Features

■ Supply Manager with main supply low voltage

detection (LVD)

■ Reset Sequence Manager (RSM)

Figure 11. Clock, Reset and Supply Block Diagram

OSC2

OSC1

RESET

VDD

VSS

MULTI-

OSCILLATOR

(MO)

CLOCK SECURITY SYSTEM

(CSS)

CLOCK

FILTER

SAFE

OSC

fOSC

TO

MAIN CLOCK

CONTROLLER

RESET SEQUENCE

MANAGER

(RSM)

FROM

WATCHDOG

PERIPHERAL

LOW VOLTAGE

DETECTOR

(LVD)

LVD

CSS WDG

CRSR 0 0 0 RF 0 IE D RF

CSS INTERRUPT

26/150

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