REV. 1.0.3 3.3 Infrared Mode Each UART in the V352 includes the infrared encod" />
參數(shù)資料
型號： XR17V352IB113-F
廠商： Exar Corporation
文件頁數(shù)： 30/64頁
文件大?。?/td> 0K
描述： IC UART PCIE 256B DUAL 113FPBGA
產(chǎn)品培訓(xùn)模塊： PCIe UARTs
標(biāo)準(zhǔn)包裝： 260
特點(diǎn)： *
通道數(shù)： 2，DUART
FIFO's： 256 字節(jié)
規(guī)程： RS485
電源電壓： 3.3V
帶自動流量控制功能： 是
帶IrDA 編碼器/解碼器： 是
帶故障啟動位檢測功能： 是
帶調(diào)制解調(diào)器控制功能： 是
安裝類型： 表面貼裝
封裝/外殼： 113-LFBGA
供應(yīng)商設(shè)備封裝： 113-FPBGA
包裝： 托盤
其它名稱： 1016-1471
XR17V352IB113-F-ND
XR17V352
36
HIGH PERFORMANCE DUAL PCI EXPRESS UART
REV. 1.0.3
3.3
Infrared Mode
Each UART in the V352 includes the infrared encoder and decoder compatible to the IrDA (Infrared Data
Association) version 1.1. The input pin ENIR conveniently activates both UART channels to start up in the
infrared mode. 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 its
receiver while the transmitter is sending data. This prevents the echoed data from going to 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[1:0], would
idle LOW. Likewise, the RX [1:0] inputs assume a LOW idle level.
The infrared encoder sends out a 3/16 of a bit wide 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
Figure 11 below. Typical max data rate for the infrared encoder with a 3/16 of a bit wide pulse is 115.2 kbps.
For data rates above 115.2 kbps and up to1.152 Mbps, Fast IR mode can be enabled via DLD bit-4 for a 1/4 of
bit wide pulse. For exact 3/16 or 1/4 of a bit wide pulse, the 16X sampling rate should be used and DLD[3:0] =
’0000’. The IR pulse width can vary if DLD[3:0] is not ’0000’.
The infrared decoder receives the input pulse from the infrared sensing diode on RX pin. Each time the
decoder senses a light pulse, it returns a "0" to the data bit stream. The RX input signal may be inverted prior
delivered to the input of the decoder via internal register setting. This option supports active LOW instead of
normal active HIGH pulse from some infrared modules on the market.
FIGURE 11. 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-1
RX Data
Receive
IR Pulse
(RX pin)
Character
Data Bits
Sta
rt
Stop
00
0
11
1
11
TX Data
Transmit
IR Pulse
(TX Pin)
Bit Time
1/2 Bit Time
3/16 or 1/4
Bit Time
IrEncoder-1
相關(guān)PDF資料
PDF描述
XR17V354IB176-F IC UART PCIE 256B QUAD 176FPBGA
XR17V358IB176-F IC UART PCIE OCTAL 176FPBGA
XR19L200IL32-F IC UART/TXRX RS232 32QFN
XR19L202IL48-F IC UART/TXRX RS232 48QFN
XR19L210IL40-F IC UART/TXRX RS232 40QFN
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR17V354 制造商:EXAR 制造商全稱:EXAR 功能描述:HIGH PERFORMANCE QUAD PCI-EXPRESS UART
XR17V354IB-0A-EVB 功能描述:界面開發(fā)工具 Eval Board for XR17V354IB-0A 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
XR17V354IB176-F 功能描述:UART 接口集成電路 4 Channel PCIe UART w/256 Byte FIFO 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
XR17V354IB-E4-EVB 功能描述:界面開發(fā)工具 Eval Board for XR17V354IB-E4 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
XR17V354IB-E8-EVB 功能描述:界面開發(fā)工具 Eval Board for XR17V354IB-E8 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
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*