Rainbow-electronics MAXQ613 Manual de usuario descargar pdf (Pagina 25)

16-Bit Microcontroller with Infrared Module

MAXQ613

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Table 5. Stop Mode Power-Fail Detection States with Power-Fail Monitor Enabled

Figure 12. Stop Mode Power-Fail Detection States with Power-Fail Monitor Enabled

PFW

RST

POR

B C

t < t

PFW

t ≥ t

PFW

t ≥ t

PFW

STOP

INTERNAL RESET

(ACTIVE HIGH)

STATE POWER-FAIL

INTERNAL

REGULATOR

CRYSTAL

OSCILLATOR

SRAM

RETENTION

COMMENTS

A On Off Off Yes

Application enters stop mode.

> V

RST

CPU in stop mode.

B On Off Off Yes

Power drop too short.

Power-fail not detected.

C On On On Yes

RST

< V

PFW

Power-fail warning detected.

Turn on regulator and crystal.

Crystal warmup time, t

XTAL_RDY

Exit stop mode.

D On Off Off Yes

Application enters stop mode.

> V

RST

CPU in stop mode.

(Periodically)

Off Off Yes

POR

< V

RST

Power-fail detected.

CPU goes into reset.

Power-fail monitor turns on periodically.

F Off Off Off —

< V

POR

Device held in reset. No operation allowed.

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Rainbow-electronics MAXQ613 Manual de usuario Pagina 25

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