pic32mx320f064h Microchip Technology Inc., pic32mx320f064h Datasheet - Page 479

• Manufacturer Part Number: pic32mx320f064h
• Description: 64/100-pin General Purpose, 32-bit Flash Microcontrollers
• Manufacturer: Microchip Technology Inc.

26.0
This section describes the operation of the Watchdog
Timer (WDT) and Power-up Timer of the PIC32MX.
The WDT, when enabled, operates from the internal
Low-Power Oscillator (LPRC) clock source and can be
used to detect system software malfunctions by reset-
TABLE 26-1:
FIGURE 26-1:
© 2007 Microchip Technology Inc.
Awake
Sleep
Idle
Note 1:
Device Mode
Note:
WATCHDOG TIMER
WDTCLR =
Reference Manual” (DS61132) for a
Status bits are in the RCON register.
This data sheet summarizes the features of
the PIC32MX family of devices. It is not
intended to be a comprehensive reference
source. Refer to the “PIC32MX Family
detailed description of this peripheral.
WDT Enable
PWRT Enable
Oscillator
WDT Enable
LPRC
RESULTS OF A WDT TIME-OUT EVENT FOR AVAILABLE MODES OF DEVICE
OPERATION
Device Reset
Wake
Generated
1
WATCHDOG AND POWER-UP TIMER BLOCK DIAGRAM
Yes
No
No
Non-Maskable
Generated
Interrupt
Yes
Yes
No
Advance Information
WDT Counter Reset
WDTO
Clock
Yes
Yes
Yes
Set
(1)
Bit
ting 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.
Refer to Figure 26-1.
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
25-Bit Counter
FWDTPS<4:0>(DEVCFG1<20:16>)
SLEEP
1:64 Output
25
Yes
Set
No
No
(1)
1
Bit
Decoder
IDLE
PWRT Enable
Power Save
(1)
Yes
No
No
Bit Set
PIC32MX
0
1
DS61143-page 477
Control
PWRT
Device Reset
NMI (Wake-up)
LPRC
Registers
Device
Reset
Yes
No
No