Microchip Technology MCP9800DM-DL2 Data Sheet

 2004-2013 Microchip Technology Inc.

DS40001239E-page 21

 

The Oscillator Calibration (OSCCAL) register is used to
calibrate the internal precision 4 MHz oscillator. It
contains seven bits for calibration

.

After you move in the calibration constant, do not
change the value. See Section 9.2.2 “Internal 4 MHz
Oscillator”.

              

Erasing the device will also erase the pre-
programmed internal calibration value for
the internal oscillator. The calibration
value must be read prior to erasing the
part so it can be reprogrammed correctly
later.

R/W-1

R/W-1

R/W-1

R/W-1

R/W-1

R/W-1

R/W-1

R/W-0

CAL6

CAL5

CAL4

CAL3

CAL2

CAL1

CAL0

FOSC4

bit 7

bit 0

Legend:
R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 7-1

CAL<6:0>: Oscillator Calibration bits
0111111 = Maximum frequency
•
•
•
0000001 
0000000 = Center frequency
1111111
•
•
•
1000000 =Minimum frequency

bit 0

FOSC4: INTOSC/4 Output Enable bit

1 = INTOSC/4 output onto GP2
0 = GP2/T0CKI/COUT applied to GP2

Overrides GP2/T0CKI/COUT control registers when enabled.