PIC12C5XX
4.5
OSCCAL Register
The Oscillator Calibration (OSCCAL) register is used to
calibrate the internal 4 MHz oscillator. It contains four to
six bits for calibration. Increasing the cal value
increases the frequency. See Section 7.2.5 for more
information on the internal oscillator.
FIGURE 4-6: OSCCAL REGISTER (ADDRESS 05h) FOR PIC12C508 AND PIC12C509
R/W-0
CAL3
R/W-1
CAL2
R/W-1
CAL1
R/W-1
CAL0
R/W-0
R/W-0
U-0
U-0
—
—
—
—
R
W
U
= Readable bit
= Writable bit
= Unimplemented bit,
read as ‘0’
bit7
bit0
- n = Value at POR reset
bit 7-4: CAL<3:0>: Calibration
bit 3-0: Unimplemented: Read as ’0’
FIGURE 4-7: OSCCAL REGISTER (ADDRESS 05h) FOR PIC12C508A/C509A/CR509A/12CE518/
12CE519
R/W-1
CAL5
R/W-0
CAL4
R/W-0
CAL3
R/W-0
CAL2
R/W-0
CAL1
R/W-0
CAL0
U-0
—
U-0
—
R
W
U
= Readable bit
= Writable bit
= Unimplemented bit,
read as ‘0’
bit7
bit0
- n = Value at POR reset
bit 7-2: CAL<5:0>: Calibration
bit 1-0: Unimplemented: Read as ’0’
DS40139E-page 18
1999 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
