12F629 Microchip Technology, Inc., 12F629 Datasheet - Page 18

• Manufacturer Part Number: 12F629
• Description: 8-pin Flash-based 8-bit CMOS Microcontrollers
• Manufacturer: Microchip Technology, Inc.

PIC12F629/675
2.2.2.6
The Power Control (PCON) register contains flag bits
to differentiate between a:
• Power-on Reset (POR)
• Brown-out Detect (BOD)
• Watchdog Timer Reset (WDT)
• External MCLR Reset
The PCON Register bits are shown in Register 2-6.
REGISTER 2-6:
2.2.2.7
The Oscillator Calibration register (OSCCAL) is used to
calibrate the internal 4 MHz oscillator. It contains 6 bits
to adjust the frequency up or down to achieve 4 MHz.
The OSCCAL register bits are shown in Register 2-7.
REGISTER 2-7:
DS41190C-page 16
bit 7-2
bit 1-0
bit 7-2
bit 1
bit 0
PCON Register
OSCCAL Register
PCON — POWER CONTROL REGISTER (ADDRESS: 8Eh)
OSCCAL — OSCILLATOR CALIBRATION REGISTER (ADDRESS: 90h)
bit 7
bit 7
Unimplemented: Read as '0'
POR: Power-on Reset STATUS bit
1 = No Power-on Reset occurred
0 = A Power-on Reset occurred (must be set in software after a Power-on Reset occurs)
BOD: Brown-out Detect STATUS bit
1 = No Brown-out Detect occurred
0 = A Brown-out Detect occurred (must be set in software after a Brown-out Detect occurs)
CAL5:CAL0: 6-bit Signed Oscillator Calibration bits
111111 = Maximum frequency
100000 = Center frequency
000000 = Minimum frequency
Unimplemented: Read as '0'
Legend:
R = Readable bit
- n = Value at POR
Legend:
R = Readable bit
- n = Value at POR
R/W-1
CAL5
U-0
—
R/W-0
CAL4
U-0
—
R/W-0
CAL3
U-0
—
W = Writable bit
’1’ = Bit is set
W = Writable bit
’1’ = Bit is set
R/W-0
CAL2
U-0
—
R/W-0
U = Unimplemented bit, read as ‘0’
’0’ = Bit is cleared
U = Unimplemented bit, read as ‘0’
’0’ = Bit is cleared
CAL1
U-0
—
R/W-0
CAL0
U-0
—
 2003 Microchip Technology Inc.
x = Bit is unknown
x = Bit is unknown
R/W-0
POR
U-0
—
R/W-x
BOD
U-0
—
bit 0
bit 0