ST7PMC2N6B6(2004) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

ST7PMC2N6B6
(Rev.:2004)

8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, BRUSHLESS MOTOR CONTROL, FIVE TIMERS, SPI, LINSCI™

STMicroelectronics 

ST7MC1/ST7MC2

5 SUPPLY, RESET AND CLOCK MANAGEMENT

The device includes a range of utility features for

securing the application in critical situations (for

example in case of a power brown-out), and re-

ducing the number of external components. An

overview is shown in Figure 11.

For more details, refer to dedicated parametric

section.

Main features

s Reset Sequence Manager (RSM)

s 1 Crystal/Ceramic resonator oscillator

s System Integrity Management (SI)

– Main supply Low voltage detection (LVD)

– Auxiliary Voltage detector (AVD) with interrupt

capability for monitoring the main supply

– Clock Security System (CSS) with the VCO of

the PLL, providing a backup safe oscillator

– Clock Detector

– PLL which can be used to multiply the fre-

quency by 2 if the clock frequency input is

8MHz

Figure 11. Clock, Reset and Supply Block Diagram

SYSTEM INTEGRITY MANAGEMENT

OSC2

OSC1

fOSC

CLOCK SECURITY SYSTEM

OSCILLATOR

1/2

fOSC

DIV2 OPT

8Mhz PLL

Safeosc

16Mhz

lock

fCLK MAIN CLOCK fCPU

CONTROLLER

WITH REALTIME

CLOCK (MCC/RTC)

fMTC

CKSEL

SICSR, page 1

PA

GE

0

VCO LO PLL

EN CK EN

0

CK

SEL

0

RESET

VSS

VDD

Clock Detector

RESET SEQUENCE

MANAGER

(RSM)

AVD Interrupt Request

SICSR, page 0

PA AVD AVD LVD

GE IE F RF

0

CSS CSS WDG

IE D RF

WATCHDOG

TIMER (WDG)

CSS Interrupt Request

LOW VOLTAGE

DETECTOR

(LVD)

AUXILIARY VOLTAGE

DETECTOR

(AVD)

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