PIC16F917-E/ML View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16F917-E/ML

28/40/44/64-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt Technology

Microchip Technology 

PIC16F913/914/916/917/946

REGISTER 16-2:

WDTCON – WATCHDOG TIMER CONTROL REGISTER (ADDRESS: 105h)

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

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 (Reset value)

0101 = 1:1024

0110 = 1:2048

0111 = 1:4096

1000 = 1:8192

1001 = 1:16384

1010 = 1:32768

1011 = 1:65536

1100 = reserved

1101 = reserved

1110 = reserved

1111 = reserved

SWDTEN: Software Enable or Disable the Watchdog Timer bit(1)

1 = WDT is turned on

0 = WDT is turned off (Reset value)

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 16-8: SUMMARY OF WATCHDOG TIMER REGISTERS

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

CONFIG

OPTION_REG

CPD

RBPU

CP

INTEDG

MCLRE

T0CS

PWRTE

T0SE

WDTE

PSA

FOSC2

PS2

FOSC1

PS1

FOSC0

PS0

WDTCON

—

—

—

WDTPS3 WDTPS2 WSTPS1

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

Note 1: See Register 16-1 for operation of all Configuration Word register bits.

WDTPS0

SWDTEN

© 2007 Microchip Technology Inc.

DS41250F-page 235

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