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参数资料
| 型号： | BX80546PG2800E |
| 厂商： | INTEL CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, 2800 MHz, MICROPROCESSOR, CPGA478 |
| 封装： | 1.27 MM PITCH, FLIP CHIP, MICRO PGA-478 |
| 文件页数： | 30/80页 |
| 文件大小： | 1845K |
| 代理商： | BX80546PG2800E |
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37
XMEGA C3 [DATASHEET]
8361D–AVR–07/2013
20.
RTC – 16-bit Real-Time Counter
20.1 Features
16-bit resolution
Selectable clock source
– 32.768kHz external crystal
– External clock
– 32.768kHz internal oscillator
– 32kHz internal ULP oscillator
Programmable 10-bit clock prescaling
One compare register
One period register
Clear counter on period overflow
Optional interrupt/event on overflow and compare match
20.2 Overview
The 16-bit real-time counter (RTC) is a counter that typically runs continuously, including in low-power sleep modes, to
keep track of time. It can wake up the device from sleep modes and/or interrupt the device at regular intervals.
The reference clock is typically the 1.024kHz output from a high-accuracy crystal of 32.768kHz, and this is the
configuration most optimized for low power consumption. The faster 32.768kHz output can be selected if the RTC needs
a resolution higher than 1ms. The RTC can also be clocked from an external clock signal, the 32.768kHz internal
oscillator or the 32kHz internal ULP oscillator.
The RTC includes a 10-bit programmable prescaler that can scale down the reference clock before it reaches the
counter. A wide range of resolutions and time-out periods can be configured. With a 32.768kHz clock source, the
maximum resolution is 30.5μs, and time-out periods can range up to 2000 seconds. With a resolution of 1s, the
maximum timeout period is more than18 hours (65536 seconds). The RTC can give a compare interrupt and/or event
when the counter equals the compare register value, and an overflow interrupt and/or event when it equals the period
register value.
Figure 20-1. Real-time counter overview.
32.768kHz Crystal Osc
32.768kHz Int. Osc
TOSC1
TOSC2
External Clock
DIV32
32kHz int ULP (DIV32)
RTCSRC
10-bit
prescaler
clkRTC
CNT
PER
COMP
=
”match”/
Compare
TOP/
Overflow
相关PDF资料 |
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| BU-61559D1-260S | 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQIP78 |
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| BU-61559D1-510K | 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQIP78 |
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| BU-61559D1-740W | 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQIP78 |
相关代理商/技术参数 |
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|---|---|
| BX80546PG3000E S L7PM | 制造商:Intel 功能描述: |
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| BX80546PG3200E S L8K2 | 制造商:Intel 功能描述: |
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