Datasheet

PIC12F510/16F506
DS41268D-page 22 © 2007 Microchip Technology Inc.
REGISTER 4-4: OPTION_REG: OPTION REGISTER (PIC16F506)
W-1 W-1 W-1 W-1 W-1 W-1 W-1 W-1
RBWU RBPU 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
RBWU: Enable Wake-up On Pin Change bit (RB0, RB1, RB3, RB4)
1 = Disabled
0 = Enabled
bit 6
RBPU: Enable Weak Pull-Ups bit (RB0, RB1, RB3, RB4)
1 = Disabled
0 = Enabled
bit 5
T0CS: Timer0 Clock Source Select bit
1 = Transition on T0CKI pin
0 = Internal instruction cycle clock (CLKOUT)
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 assigned to the WDT
0 = Prescaler assigned to Timer0
bit 2-0
PS<2:0>: Prescaler Rate Select bits
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
1 : 2
1 : 4
1 : 8
1 : 16
1 : 32
1 : 64
1 : 128
Bit Value Timer0 Rate WDT Rate