PIC16F676-I/ML View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16F676-I/ML

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

Microchip Technology 

PIC16F630/676

FIGURE 9-12:

CLKOUT

(= FOSC/4)

T0CKI

pin

T0SE

WATCHDOG TIMER BLOCK DIAGRAM

0

1

0

T0CS

1

PSA

8-bit

Prescaler

8

1

SYNC 2

Cycles

0

PSA

Watchdog

Timer

PS0 - PS2

1

0

WDTE

PSA

Note 1: T0SE, T0CS, PSA, PS0-PS2 are bits in the OPTION register.

WDT

Time-out

Data Bus

8

TMR0

Set Flag bit T0IF

on Overflow

TABLE 9-9: SUMMARY OF WATCHDOG TIMER REGISTERS

Address

Name

Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1

Bit 0

Value on

POR, BOD

Value on all

other

Resets

81h

OPTION_REG RAPU INTEDG T0CS T0SE PSA PS2 PS1 PS0 1111 1111 1111 1111

2007h Config. bits

CP BODEN MCLRE PWRTE WDTE F0SC2 F0SC1 F0SC0 uuuu uuuu uuuu uuuu

Legend: u = Unchanged, shaded cells are not used by the Watchdog Timer.

 2010 Microchip Technology Inc.

DS40039F-page 69

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