C8051F987-GMR Silicon Labs, C8051F987-GMR Datasheet - Page 193
C8051F987-GMR
Manufacturer Part Number
C8051F987-GMR
Description
8-bit Microcontrollers - MCU 8kB 512B RAM
Manufacturer
Silicon Labs
Datasheet
1.C8051F986-GUR.pdf
(322 pages)
Specifications of C8051F987-GMR
Rohs
yes
Core
8051
Processor Series
C8051
Data Bus Width
8 bit
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SFR Definition 19.3. OSCICL: Internal Oscillator Calibration
SFR Page = 0x0; SFR Address = 0xB3
Note: If the Precision Internal Oscillator is selected as the system clock, the following procedure should be used
Name
Reset
Type
6:0
Bit
Bit
7
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.
OSCICL
Name
SSE
SSE
R/W
7
0
Spread Spectrum Enable.
0: Spread Spectrum clock dithering disabled.
1: Spread Spectrum clock dithering enabled.
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.
Varies
R
6
Varies
R/W
5
Varies
R/W
Rev. 1.1
4
OSCICL
C8051F99x-C8051F98x
Function
Varies
R/W
3
[6:0]
Varies
R/W
2
Varies
R/W
1
Varies
R/W
0
193
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