ATXMEGA384A1-CU ATMEL [ATMEL Corporation], ATXMEGA384A1-CU Datasheet - Page 20
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ATXMEGA384A1-CU
Manufacturer Part Number
ATXMEGA384A1-CU
Description
8/16-bit XMEGA A1 Microcontroller
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.ATXMEGA384A1-CU.pdf
(82 pages)
- Current page: 20 of 82
- Download datasheet (2Mb)
10.3.3
10.3.4
10.3.5
10.3.6
10.3.7
10.3.8
8067D–AVR–08/08
32.768 kHz Crystal Oscillator
0.4 - 16 MHz Crystal Oscillator
2 MHz Run-time Calibrated Internal Oscillator
32 MHz Run-time Calibrated Internal Oscillator
External Clock input
PLL with Multiplication factor 2 - 31x
The 32.768 kHz Crystal Oscillator is a low power driver for an external watch crystal. It can be
used as system clock source or as asynchronous clock source for the Real Time Counter.
The 0.4 - 16 MHz Crystal Oscillator is a driver intended for driving both external resonators and
crystals ranging from 400 kHz to 16 MHz.
The 2 MHz Run-time Calibrated Internal Oscillator is a high frequency oscillator. It is calibrated
during protection to provide a default frequency which is close to its nominal frequency. The
oscillator can use the 32 kHz Calibrated Internal Oscillator or the 32 kHz Crystal Oscillator as a
source for calibrating the frequency run-time to compensate for temperature and voltage drift
hereby optimizing the accuracy of the oscillator.
The 32 MHz Run-time Calibrated Internal Oscillator is a high frequency oscillator. It is calibrated
during protection to provide a default frequency which is close to its nominal frequency. The
oscillator can use the 32 kHz Calibrated Internal Oscillator or the 32 kHz Crystal Oscillator as a
source for calibrating the frequency run-time to compensate for temperature and voltage drift
hereby optimizing the accuracy of the oscillator.
The external clock input gives the possibility to connect a clock from an external source.
The PLL provides the possibility of multiplying a frequency by any number from 2 to 31. In com-
bination with the prescalers, this gives a wide range of output frequencies from all clock sources.
XMEGA A1
20
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