Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsMicrocontrollers, Microprocessors & QuartzesEmbedded microcontroller DFN 8 S (6x5) 8-Bit 20 MHz I/O number 5

PIC12F683

2.2.2.2 OPTION Register

The OPTION register is a readable and writable

configure:

• TMR0/WDT prescaler

• External GP2/INT interrupt

•TMR0

• Weak pull-ups on GPIO

Note: To achieve a 1:1 prescaler assignment for

Timer0, assign the prescaler to the WDT

by setting PSA bit of the OPTION register

to ‘1’ See Section 5.1.3 “Software Pro-

grammable Prescaler”.

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

GPPU

INTEDG T0CS T0SE PSA PS2 PS1 PS0

bit 7 bit 0

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

bit 7 GPPU

: GPIO Pull-up Enable bit

1 = GPIO pull-ups are disabled

0 = GPIO pull-ups are enabled by individual PORT latch values in WPU register

bit 6 INTEDG: Interrupt Edge Select bit

1 = Interrupt on rising edge of INT pin

0 = Interrupt on falling edge of INT pin

bit 5 T0CS: Timer0 Clock Source Select bit

1 = Transition on T0CKI pin

0 = Internal instruction cycle clock (FOSC/4)

bit 4 T0SE: Timer0 Source Edge Select bit

1 = Increment on high-to-low transition on T0CKI pin

0 = Increment on low-to-high transition on T0CKI pin

bit 3 PSA: Prescaler Assignment bit

1 = Prescaler is assigned to the WDT

0 = Prescaler is assigned to the Timer0 module

bit 2-0 PS<2:0>: Prescaler Rate Select bits

Note 1: A dedicated 16-bit WDT postscaler is available. See Section 12.6 “Watchdog Timer (WDT)” for more

information.

000

001

010

011

100

101

110

111

1 : 2

1 : 4

1 : 8

1 : 16

1 : 32

1 : 64

1 : 128

1 : 256

1 : 1