PIC32MX230F128L-I/PF View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC32MX230F128L-I/PF

32-bit Microcontrollers (up to 512 KB Flash and 64 KB SRAM) with Audio/Graphics/Touch (HMI), CAN, USB, and Advanced Analog

Microchip Technology 

PIC32MX1XX/2XX/5XX 64/100-PIN FAMILY

14.0 WATCHDOG TIMER (WDT)

Note:

This data sheet summarizes the

features of the PIC32MX1XX/2XX/5XX

64/100-pin Family family of devices. It is

not intended to be a comprehensive

reference source. To complement the

information in this data sheet, refer to

Section 9. “Watchdog, Deadman, and

Power-up Timers” (DS60001114) in the

“PIC32 Family Reference Manual”,

which is available from the Microchip

web site (www.microchip.com/PIC32).

The Watchdog Timer (WDT), when enabled, operates

from the internal Low-Power Oscillator (LPRC) clock

source and can be used to detect system software mal-

functions by resetting the device if the WDT is not

cleared periodically in software. Various WDT time-out

periods can be selected using the WDT postscaler. The

WDT can also be used to wake the device from Sleep

or Idle mode.

The following are some of the key features of the WDT

module:

• Configuration or software controlled

• User-configurable time-out period

• Can wake the device from Sleep or Idle

FIGURE 14-1:

WATCHDOG AND POWER-UP TIMER BLOCK DIAGRAM

PWRT Enable

WDT Enable

LPRC

Oscillator

WDTCLR = 1

WDT Enable

Wake

WDT Enable

Reset Event

Clock

1:64 Output

1

PWRT Enable

LPRC

Control

PWRT

25-bit Counter

25

WDT Counter Reset

0

Device Reset

1

NMI (Wake-up)

Power Save

Decoder

FWDTPS<4:0> (DEVCFG1<20:16>)

 2014-2017 Microchip Technology Inc.

DS60001290E-page 169

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