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參數(shù)資料
| 型號： | XR16M698IQ-0A-EVB |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 13/58頁 |
| 文件大?。?/td> | 0K |
| 描述： | EVAL BOARD FOR M698-A 100QFP |
| 標準包裝： | 1 |
| 系列： | * |
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XR16M698
20
1.62V TO 3.63V HIGH PERFORMANCE OCTAL UART WITH 32-BYTE FIFO
REV. 1.0.0
2.14
Infrared Mode
Each UART in the 698 includes the infrared encoder and decoder compatible to the IrDA (Infrared Data
Association) version 1.0. The input pin ENIR conveniently activates all 8 UART channels to start up in the
infrared mode. Note that the ENIR pin is sampled when the RST# input is de-asserted. This global control pin
enables the MCR bit-6 function in every UART channel register. After power up or a reset, the software can
overwrite MCR bit-6 if so desired. ENIR and MCR bit-6 also disable the receiver while the transmitter is
sending data. This prevents echoed data from reaching the receiver. The global activation ENIR pin prevents
the infrared emitter from turning on and drawing large amount of current while the system is starting up. When
the infrared feature is enabled, the transmit data outputs, TX[7:0], would idle at logic zero level. Likewise, the
RX [7:0] inputs assume an idle level of logic zero.
The infrared encoder sends out a 3/16 of a bit wide HIGH-pulse for each “0” bit in the transmit data stream.
This signal encoding reduces the on-time of the infrared LED, hence reduces the power consumption. See
below.
The infrared decoder receives the input pulse from the infrared sensing diode on RX pin. Each time it senses a
light pulse, it returns a logic zero to the data bit stream. The decoder also accepts (when FCTR bit-4 = 1) an
inverted IR-encoded input signal. This option supports active LOW instead of normal active HIGH pulse from
some infrared modules on the market.
FIGURE 10. INFRARED TRANSMIT DATA ENCODING AND RECEIVE DATA DECODING
Character
Data Bits
Start
Stop
00
0
11
1 11
Bit Time
1/16 Clock Delay
IRdecoder-
RX Data
Receive
IR Pulse
(RX pin)
Character
Data Bits
Sta
rt
Stop
00
0
11
1
TX Data
Transmit
IR Pulse
(TX Pin)
Bit Time
1/2 Bit Time
3/16 Bit Time
IrEncoder-1
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| XR16M698IQ-0B-EVB | 功能描述:界面開發(fā)工具 Eval Board for XR16M698IQ-0B RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
| XR16M698IQ100 | 制造商:EXAR 制造商全稱:EXAR 功能描述:1.62V TO 3.63V HIGH PERFORMANCE OCTAL UART WITH 32-BYTE FIFO |
| XR16M698IQ100-F | 功能描述:UART 接口集成電路 8-ch 32-byte UART RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
| XR16M698IQ100TR-F | 制造商:Exar Corporation 功能描述:UART 8-CH 32Byte FIFO 1.8V/2.5V/3.3V 100-Pin PQFP T/R 制造商:Exar Corporation 功能描述:XR16M698IQ100TR-F |
| XR16M752 | 制造商:EXAR 制造商全稱:EXAR 功能描述:HIGH PERFORMANCE DUART WITH 64-BYTE FIFO |
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