C8051F99X_10 Datasheet, PDF (193/322 Pages) Silicon Laboratories – Ultra Low Power, 8-2 kB Flash, Capacitive Sensing MCU

C8051F99x-C8051F98x
SFR Definition 19.3. OSCICL: Internal Oscillator Calibration
Bit
7
6
5
Name
Type
Reset
SSE
R/W
0
R
Varies
R/W
Varies
SFR Page = 0x0; SFR Address = 0xB3
4
3
2
R/W
OSCICL[6:0]
R/W
R/W
Varies
Varies
Varies
1
R/W
Varies
0
R/W
Varies
Bit Name
Function
7
SSE Spread Spectrum Enable.
0: Spread Spectrum clock dithering disabled.
1: Spread Spectrum clock dithering enabled.
6:0 OSCICL Internal Oscillator Calibration.
Factory calibrated to obtain a frequency of 24.5 MHz. Incrementing this register
decreases the oscillator frequency and decrementing this register increases the
oscillator frequency. The step size is approximately 1% of the calibrated frequency.
The recommended calibration frequency range is between 16 and 24.5 MHz.
Note: If the Precision Internal Oscillator is selected as the system clock, the following procedure should be used
when changing the value of the internal oscillator calibration bits.
1. Switch to a different clock source.
2. Disable the oscillator by writing OSCICN.7 to 0.
3. Change OSCICL to the desired setting.
4. Enable the oscillator by writing OSCICN.7 to 1.
Rev. 1.0
193