PIC16F636T-I/SL(2005) View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16F636T-I/SL
(Rev.:2005)

8/14-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

Microchip Technology 

PIC12F635/PIC16F636/639

REGISTER 12-2:

WDTCON – WATCHDOG TIMER CONTROL REGISTER (ADDRESS: 18h)

U-0

U-0

U-0

R/W-0 R/W-1 R/W-0 R/W-0

R/W-0

—

—

—

WDTPS3 WDTPS2 WDTPS1 WDTPS0 SWDTEN(1)

bit 7

bit 0

bit 7-5

bit 4-1

bit 0

Unimplemented: Read as ‘0’

WDTPS<3:0>: Watchdog Timer Period Select bits

Bit Value = Prescale Rate

0000 = 1:32

0001 = 1:64

0010 = 1:128

0011 = 1:256

0100 = 1:512

0101 = 1:1024

0110 = 1:2048

0111 = 1:4096

1000 = 1:8192

1001 = 1:16394

1010 = 1:32768

1011 = 1:65536

1100 = reserved

1101 = reserved

1110 = reserved

1111 = reserved

SWDTEN: Software Enable/Disable for Watchdog Timer bit(1)

1 = WDT is turned on

0 = WDT is turned off

Note 1: If WDTE configuration bit = 1, then WDT is always enabled, irrespective of this

control bit. If WDTE configuration bit = 0, then it is possible to turn WDT on/off with

this control bit.

Legend:

R = Readable bit

- n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

TABLE 12-8: SUMMARY OF WATCHDOG TIMER REGISTERS

Address

Name

Bit 7 Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

18h

WDTCON

—

—

— WDTPS3 WDTPS2 WSTPS1 WDTPS0 SWDTEN

81h

OPTION_REG

RAPU INTEDG T0CS T0SE

PSA

2007h(1) CONFIG

CPD

CP

MCLRE PWRTE WDTE

Legend: Shaded cells are not used by the Watchdog Timer.

Note 1: See Register 12-1 for operation of all Configuration Word register bits.

PS2

PS1

PS0

FOSC2 FOSC1 FOSC0

DS41232B-page 126

Preliminary

© 2005 Microchip Technology Inc.

Share Link: