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ATXMEGA8E5 데이터시트(PDF) 47 Page - Microchip Technology

부품명 ATXMEGA8E5
상세설명  XMEGA짰 E5 Data Sheet
PDF  153 Pages
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

ATXMEGA8E5 데이터시트(HTML) 47 Page - Microchip Technology

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 2018 Microchip Technology Inc.
Data Sheet Complete
DS40002059A-page 47
ATxmega32E5/16E5/8E5
Figure 21-1. Real-time Counter Overview
The RTC also supports correction when operated using external 32.768 kHz crystal oscillator. An externally calibrated
value will be used for correction. The calibration can be done by measuring the default RTC frequency relative to a more
accurate clock input to the device as system clock. The RTC can be calibrated to an accuracy of ±0.5ppm. The RTC cor-
rection operation will either speed up (by skipping count) or slow down (adding extra cycles) the prescaler to account for
the crystal oscillator error.
32.768 kHz Crystal
Osc
32.768 kHz Int. Osc
TOSC1
TOSC2
External Clock
32 kHz int ULP
(DIV32)
RTCSRC
clkRTC
CNT
PER
COMP
=
=
”match”/
Compare
TOP/
Overflow
CALIB
Correction
Counter
Hold Count
10-bit
prescaler



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