PIC12C509AT-04 View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC12C509AT-04

8-Pin, 8-Bit CMOS Microcontrollers

Microchip Technology 

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 R/W-1 R/W-1 R/W-1 R/W-0 R/W-0

U-0

CAL3 CAL2 CAL1 CAL0

—

—

—

bit7

bit 7-4: CAL<3:0>: Calibration

bit 3-0: Unimplemented: Read as ’0’

U-0

—

bit0

R = Readable bit

W = Writable bit

U = Unimplemented bit,

read as ‘0’

- n = Value at POR reset

FIGURE 4-7: OSCCAL REGISTER (ADDRESS 05h) FOR PIC12C508A/C509A/CR509A/12CE518/

12CE519

R/W-1 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0

U-0

CAL5 CAL4 CAL3 CAL2 CAL1

CAL0

—

bit7

bit 7-2: CAL<5:0>: Calibration

bit 1-0: Unimplemented: Read as ’0’

U-0

—

bit0

R = Readable bit

W = Writable bit

U = Unimplemented bit,

read as ‘0’

- n = Value at POR reset

DS40139E-page 18

© 1999 Microchip Technology Inc.

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