REV. 1.2.2 36 5.5 Infrared Mode Each UART in the D158 includes the infrare" />
參數(shù)資料
型號: XR17D158IV-F
廠商: Exar Corporation
文件頁數(shù): 30/73頁
文件大小: 0K
描述: IC UART PCI BUS OCTAL 144LQFP
產(chǎn)品培訓(xùn)模塊: UART Product Overview
標(biāo)準(zhǔn)包裝: 60
特點: *
通道數(shù): 8
FIFO's: 64 字節(jié)
規(guī)程: RS485
電源電壓: 3.3V,5V
帶自動流量控制功能:
帶IrDA 編碼器/解碼器:
帶故障啟動位檢測功能:
帶調(diào)制解調(diào)器控制功能:
安裝類型: 表面貼裝
封裝/外殼: 144-LQFP
供應(yīng)商設(shè)備封裝: 144-LQFP(20x20)
包裝: 托盤
其它名稱: 1016-1292
XR17D158
xr
UNIVERSAL (3.3V AND 5V) PCI BUS OCTAL UART
REV. 1.2.2
36
5.5
Infrared Mode
Each UART in the D158 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. 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[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 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
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 logic zero 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 17. INFRARED TRANSMIT DATA ENCODING AND RECEIVE DATA DECODING
Character
Data Bits
Start
Stop
00
0
11
1 1
1
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
相關(guān)PDF資料
PDF描述
XR17V252IM IC UART PCI BUS DUAL 100TQFP
XR17V254IV-F IC UART PCI BUS QUAD 144LQFP
XR17V258IV-F IC UART PCI BUS OCTAL 144LQFP
XR17V352IB113-F IC UART PCIE 256B DUAL 113FPBGA
XR17V354IB176-F IC UART PCIE 256B QUAD 176FPBGA
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR17D158IVTR-F 制造商:Exar Corporation 功能描述:UART 8-CH 64Byte FIFO 5V 144-Pin LQFP T/R 制造商:Exar Corporation 功能描述:XR17D158IVTR-F
XR17L152 制造商:EXAR 制造商全稱:EXAR 功能描述:3.3V PCI BUS DUAL UART
XR17L152CM 制造商:EXAR 制造商全稱:EXAR 功能描述:3.3V PCI BUS DUAL UART
XR17L152IM 制造商:EXAR 制造商全稱:EXAR 功能描述:3.3V PCI BUS DUAL UART
XR17L154 制造商:EXAR 制造商全稱:EXAR 功能描述:3.3V PCI BUS QUAD UART