MAXQ3212 datasheet(16/25 Pages) MAXIM

Part #	MAXQ3212

Description	Microcontroller with Analog Comparator and LED Driver

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Manufacturer	MAXIM [Maxim Integrated Products]

Direct Link	https://www.maximintegrated.com/en.html

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Microcontroller with Analog Comparator

and LED Driver

16

____________________________________________________________________

System Timing

For maximum versatility, the MAXQ3212 generates its

internal system clock from several sources:

• External clock source, including low-cost operation

from 3.58MHz “Colorburst” crystal

• External crystal or ceramic resonator, using the

internal oscillator

• External RC, using the internal relaxation oscillator

• Internal ring oscillator

A crystal warmup counter enhances operational relia-

bility. Each time the external crystal oscillation must

restart, such as after exiting stop mode, the device initi-

ates a crystal warmup period of 65,536 oscillations.

This allows time for the crystal amplitude and frequency

to stabilize before using it as a clock source. While in

the warmup mode, the device operates from the inter-

nal 8kHz ring oscillator and can optionally switch back

to the crystal as soon as the warmup period expires.

MAXQ3212

CLOCK

DIVIDER

CLOCK

SELECTOR

WATCHDOG

TIMER

CLOCK

RESET

STOP

POR

RC

OSCILLATOR

KILL

RC CLK

X-DOG

STARTUP

TIMER

XT CLK

RGMD

XT/RC

DONE

RESET

STOP

XTE

RGSL

XT/RC

SYSTEM

CLOCK

CRYSTAL/

RESONATOR

OSCILLATOR

KILL

STOP

RGSL

INTERNAL

NANO-RING

OSCILLATOR

RGSL

RGMD

RESET

RWT

EWT

EWDI

Figure 2. Clock Sources

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MAXQ3212 Datasheet(PDF) 16 Page - Maxim Integrated Products

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