PIC16F753-I/SLQTP 데이터 시트보기 (PDF) - Microchip Technology

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PIC16F753-I/SLQTP

14/16-Pin, Flash-Based 8-Bit CMOS Microcontrollers

Microchip Technology 

PIC16F753/HV753

19.6.2 WDT PROGRAMMING

CONSIDERATIONS

It should also be taken in account that under worst-

case conditions (i.e., VDD = Min., Temperature = Max.,

Max. WDT prescaler) it may take several seconds

before a WDT time-out occurs.

FIGURE 19-9:

WATCHDOG TIMER WITH SHARED PRESCALE BLOCK DIAGRAM

FOSC/4

T0CKI

pin

T0SE

0

1

T0CS

Shared Prescale

0

1

PSA

8-bit

Prescaler

8

1

0

PSA

Sync

2 TCY

Data Bus

8

TMR0

Set Flag bit T0IF

on Overflow

LFINTOSC

(Figure 4-1)

Watchdog

Timer

2

PSA

WDTE

PS<2:0>

1

0

PSA

WDT

Time-out

Note 1: T0SE, T0CS, PSA, PS<2:0> are bits in the OPTION_REG register.

2: WDTE bit is in the Configuration Word register.

TABLE 19-7: WDT STATUS

WDTE = 0

CLRWDT Command

Exit Sleep

Conditions

WDT

Cleared

 2013 Microchip Technology Inc.

Preliminary

DS40001709A-page 175

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