ATXMEGA64A1 datasheet(35/99 Pages) ATMEL

tên linh kiện	ATXMEGA64A1

Giải thích chi tiết về linh kiện	8/16-bit XMEGA A1 Microcontroller

PDF	99 Pages

Scroll/Zoom	100%

nhà sản xuất	ATMEL [ATMEL Corporation]

Trang chủ	http://www.atmel.com

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35 / 99 page

8067I–AVR–04/09

XMEGA A1

18. RTC - 16-bit Real-Time Counter

18.1

Features

• 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

18.2

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

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

10-bit

prescaler

Counter

Period

Compare

Overflow

Compare Match

1 kHz

32 kHz

ATXMEGA64A1 bảng dữ liệu(PDF) 35 Page - ATMEL Corporation