PIC16F506 Microchip Technology, PIC16F506 Datasheet - Page 22

• Manufacturer Part Number: PIC16F506
• Description: (PIC12F510 / PIC16F506) 8-Bit Flash Microcontroller
• Manufacturer: Microchip Technology

PIC12F510/16F506
4.4
The OPTION register is a 8-bit wide, write-only register,
that contains various control bits to configure the
Timer0/WDT prescaler and Timer0.
By executing the OPTION instruction, the contents of
the W register will be transferred to the OPTION
register. A Reset sets the OPTION<7:0> bits.
REGISTER 4-3:
DS41268B-page 20
Note 1: If TRIS bit is set to ‘0’, the wake-up on
2: If the T0CS bit is set to ‘1’, it will override
OPTION Register
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2-0
change
disabled for that pin (i.e., note that TRIS
overrides Option control of GPPU/RBPU
and GPWU/RBWU).
the TRIS function on the T0CKI pin.
and
OPTION REGISTER (PIC12F510)
GPWU: Enable Wake-up On Pin Change bit (GP0, GP1, GP3)
1 = Disabled
0 = Enabled
GPPU: Enable Weak Pull-ups bit (GP0, GP1, GP3)
1 = Disabled
0 = Enabled
T0CS: Timer0 Clock Source Select bit
1 = Transition on T0CKI pin
0 = Internal instruction cycle clock (CLKOUT)
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
PSA: Prescaler Assignment bit
1 = Prescaler assigned to the WDT
0 = Prescaler assigned to Timer0
PS<2:0>: Prescaler Rate Select bits
bit 7
Legend:
R = Readable bit
-n = Value at POR
GPWU
W-1
pull-up
Bit Value
000
001
010
011
100
101
110
111
GPPU
functions
W-1
Timer0 Rate
1 : 2
1 : 4
1 : 8
1 : 16
1 : 32
1 : 64
1 : 128
1 : 256
T0CS
are
W-1
Preliminary
W = Writable bit
‘1’ = Bit is set
WDT Rate
1 : 1
1 : 2
1 : 4
1 : 8
1 : 16
1 : 32
1 : 64
1 : 128
T0SE
W-1
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
PSA
W-1
W-1
PS2
© 2006 Microchip Technology Inc.
x = Bit is unknown
W-1
PS1
W-1
PS0
bit 0