PIC16C54C-04/SS218 View Datasheet(PDF) - Microchip Technology

Part Name

Description

MFG CO.

PIC16C54C-04/SS218

EPROM/ROM-Based 8-Bit CMOS Microcontroller Series

Microchip Technology 

PIC16C5X

FIGURE 7-13: WATCHDOG TIMER BLOCK DIAGRAM

From TMR0 Clock Source

Watchdog

Timer

WDT Enable

EPROM Bit

0

M

1

U

X

PSA

PPoosststsccaalelerr

8 - to - 1 MUX

PS2:PS0

To TMR0

Note: T0CS, T0SE, PSA, PS2:PS0

are bits in the OPTION register.

0

1

MUX

WDT

Time-out

PSA

TABLE 7-5: SUMMARY OF REGISTERS ASSOCIATED WITH THE WATCHDOG TIMER

Address

Name

Bit 7 Bit 6 Bit 5 Bit 4

N/A

OPTION

—

— T0CS T0SE

Legend: Shaded boxes = Not used by Watchdog Timer,

– = unimplemented, read as '0', u = unchanged

Bit 3

PSA

Bit 2

PS2

Bit 1

PS1

Bit 0

PS0

Value on

Power-On

Reset

Value on

MCLR and

WDT Reset

--11 1111 --11 1111

DS30453B-page 40

Preliminary

© 1998 Microchip Technology Inc.

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