ATXMEGA384A1-CU ATMEL [ATMEL Corporation], ATXMEGA384A1-CU Datasheet - Page 34
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)
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18. RTC - 16-bit Real-Time Counter
18.1
18.2
8067D–AVR–08/08
Features
Overview
•
•
•
•
•
•
The XMEGA A1 includes a 16-bit Real-time Counter (RTC). The RTC can be clocked from an
accurate 32.768 kHz Crystal Oscillator, the 32.768 kHz Calibrated Internal Oscillator, or from the
32 kHz Ultra Low Power Internal Oscillator. The RTC includes both a Period and a Compare
register. For details, see
A wide range of Resolution and Time-out periods can be configured using the RTC. With a max-
imum resolution of 30.5 µs, time-out periods range up to 2000 seconds. With a resolution of 1
second, the maximum time-out period is over 18 hours (65536 seconds).
Figure 18-1. Real Time Counter overview
16-bit Timer
Flexible Tick resolution ranging from 1 Hz to 32.768 kHz
One Compare register
One Period register
Clear timer on Overflow or Compare Match
Overflow or Compare Match event and interrupt generation
Figure
prescaler
32 kHz
10-bit
1 kHz
18-1.
=
=
Overflow
Compare Match
Compare
Counter
Period
XMEGA A1
34
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