Datasheet

 1997-2013 Microchip Technology Inc. DS30561C-page 21
PIC12C67X
4.2.2.7 OSCCAL REGISTER
The Oscillator Calibration (OSCCAL) Register is used
to calibrate the internal 4 MHz oscillator. It contains four
bits for fine calibration and two other bits to either
increase or decrease frequency.
REGISTER 4-7: OSCCAL REGISTER (ADDRESS 8Fh)
R/W-0 R/W-1 R/W-1 R/W-1 R/W-0 R/W-0 U-0 U-0
CAL3 CAL2 CAL1 CAL0 CALFST CALSLW
— — R = Readable bit
W = Writable bit
U = Unimplemented bit,
read as ‘0’
- n = Value at POR reset
bit7 bit0
bit 7-4: CAL<3:0>: Fine Calibration
bit 3: CALFST: Calibration Fast
1 = Increase frequency
0 = No change
bit 2: CALSLW: Calibration Slow
1 = Decrease frequency
0 = No change
bit 1-0: Unimplemented: Read as ’0’
Note: If CALFST = 1 and CALSLW = 1, CALFST has precedence.