Microchip Technology megaAVR 0 Series Manual page 33

5.8.2.3 Oscillator Configuration
Name: OSCCFG
Offset: 0x02
Reset: -
Property: -
Bit 7
OSCLOCK
Access R
Reset 0
Bit 7 – OSCLOCK Oscillator Lock
This fuse bit is loaded to LOCK in CLKCTRL.OSC20MCALIBB during Reset.
Value Description
0 Calibration registers of the 20 MHz oscillator are accessible
1 Calibration registers of the 20 MHz oscillator are locked
Bits 1:0 – FREQSEL[1:0] Frequency Select
These bits select the operation frequency of the 20 MHz internal oscillator (OSC20M) and determine the
respective factory calibration values to be written to CAL20M in CLKCTRL.OSC20MCALIBA and
TEMPCAL20M in CLKCTRL.OSC20MCALIBB.
Value Description
0x0 Reserved
0x1 Run at 16 MHz
0x2 Run at 20 MHz
0x3 Reserved
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2018 Microchip Technology Inc.
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Datasheet Preliminary
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megaAVR 0-Series
Memories
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FREQSEL[1:0]
R
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DS40002015A-page 33
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R
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