PIC16F87 datasheet(142/230 Pages) MICROCHIP

142 / 230 page

PIC16F87/88

DS30487D-page 142

 2002-2013 Microchip Technology Inc.

WDTCON: WATCHDOG CONTROL REGISTER (ADDRESS 105h)

TABLE 15-6:

SUMMARY OF WATCHDOG TIMER REGISTERS

U-0

R/W-0

R/W-1

R/W-0

—

WDTPS3

WDTPS2 WDTPS1 WDTPS0 SWDTEN(1)

bit 7

bit 0

bit 7-5

Unimplemented: Read as ‘0’

bit 4-1

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

Bit

Prescale

Value

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

bit 0

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

= WDT is turned on

= WDT is turned off

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

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

this control bit.

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

Address

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

81h,181h OPTION_REG

RBPU

INTEDG

T0CS

T0SE

PSA

PS2

PS1

PS0

2007h

Configuration bits

LVP

BOREN

MCLRE

FOSC2

PWRTEN

WDTEN

FOSC1

FOSC0

105h

WDTCON

—

WDTPS3 WDTPS2

WSTPS1 WDTPS0 SWDTEN

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

Note 1:

See Register 15-1 for operation of these bits.

PIC16F87 Datasheet(PDF) 142 Page - Microchip Technology

PIC16F87 Datasheet(HTML) 142 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL