ST72C104G2B7(2000_11) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST72C104G2B7
(Rev.:2000_11)

8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, I2C INTERFACES

STMicroelectronics 

ST72104G, ST72215G, ST72216G, ST72254G

7 SUPPLY, RESET AND CLOCK MANAGEMENT

The ST72104G, ST72215G, ST72216G and

ST72254G microcontrollers include a range of util-

ity features for securing the application in critical

situations (for example in case of a power brown-

out), and reducing the number of external compo-

nents. An overview is shown in Figure 8.

See Section 14 "ELECTRICAL CHARACTERIS-

TICS" on page 96 for more details.

Main Features

s Supply Manager with main supply low voltage

detection (LVD)

s Reset Sequence Manager (RSM)

s Multi-Oscillator (MO)

– 4 Crystal/Ceramic resonator oscillators

– 1 External RC oscillator

– 1 Internal RC oscillator

s Clock Security System (CSS)

– Clock Filter

– Backup Safe Oscillator

Figure 8. Clock, Reset and Supply Block Diagram

MCO

OSC2

OSC1

MULTI-

OSCILLATOR

(MO)

CLOCK SECURITY SYSTEM

(CSS)

CLOCK

FILTER

SAFE

OSC

fOSC

MAIN CLOCK

CONTROLLER

(MCC)

fCPU

RESET

RESET SEQUENCE

MANAGER

(RSM)

FROM

WATCHDOG

PERIPHERAL

VDD

VSS

LOW VOLTAGE

DETECTOR

(LVD)

LVD

CSS WDG

CRSR 0

0

0 RF 0 IE D RF

CSS INTERRUPT

17/140

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