PIC17CR42-08/SP View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC17CR42-08/SP

High-performance 8-Bit CMOS EPROM, ROM microcontroller

Microchip Technology 

PIC17C4X

FIGURE 14-8: WATCHDOG TIMER BLOCK DIAGRAM

On-chip RC

Oscillator(1)

WDT

Postscaler

WDT Enable

4 - to - 1 MUX

WDTPS1:WDTPS0

Note 1: This oscillator is separate from the external

RC oscillator on the OSC1 pin.

WDT Overflow

TABLE 14-4: REGISTERS/BITS ASSOCIATED WITH THE WATCHDOG TIMER

Address

Name

Bit 7 Bit 6 Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Value on

Power-on

Reset

Value on all

other resets

(Note1)

—

Config

—

PM1

—

PM0 WDTPS1 WDTPS0 FOSC1 FOSC0 (Note 2)

(Note 2)

06h, Unbanked CPUSTA

—

—

STKAV GLINTD

TO

PD

—

—

--11 11--

Legend: - = unimplemented read as '0', q - value depends on condition, shaded cells are not used by the WDT.

Note 1: Other (non power-up) resets include: external reset through MCLR and Watchdog Timer Reset.

2: This value will be as the device was programmed, or if unprogrammed, will read as all '1's.

--11 qq--

DS30412C-page 104

© 1996 Microchip Technology Inc.

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