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| 型号： | TSC87C51-33CBB |
| 厂商： | ATMEL CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, OTPROM, 33 MHz, MICROCONTROLLER, PQCC44 |
| 封装： | PLASTIC, LCC-44 |
| 文件页数： | 52/80页 |
| 文件大小： | 5152K |
| 代理商： | TSC87C51-33CBB |
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252
XMEGA A [MANUAL]
8077I–AVR–11/2012
22.
IRCOM – IR Communication Module
22.1
Features
Pulse modulation/demodulation for infrared communication
IrDA compatible for baud rates up to 115.2kbps
Selectable pulse modulation scheme
– 3/16 of the baud rate period
– Fixed pulse period, 8-bit programmable
– Pulse modulation disabled
Built-in filtering
Can be connected to and used by any USART
22.2
Overview
XMEGA devices contain an infrared communication module (IRCOM) that is IrDA compatible for baud rates up to
115.2kbps. It can be connected to any USART to enable infrared pulse encoding/decoding for that USART.
Figure 22-1. IRCOM connection to USARTs and associated port pins.
The IRCOM is automatically enabled when a USART is set in IRCOM mode. The signals between the USART and the
RX/TX pins are then routed through the module as shown in Figure 22-1 on page 252. The data on the TX/RX pins are
the inverted value of the transmitted/received infrared pulse. It is also possible to select an event channel from the event
system as input for the IRCOM receiver. This will disable the RX input from the USART pin.
For transmission, three pulse modulation schemes are available:
3/16 of the baud rate period
Fixed programmable pulse time based on the peripheral clock frequency
Pulse modulation disabled
IRCOM
Pulse
Decoding
DIF
Event System
RXDxn
TXDxn
USARTxn
....
USARTD0
USARTC0
RXDD0
TXDD0
RXDC0
TXDC0
Pulse
Encoding
decoded RXD
encoded TXD
encoded RXD
RXD...
TXD...
decoded TXD
events
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