REV. 1.0.3 2.18 Infrared Mode The V2550 UART includes the infrared encoder " />
參數(shù)資料
型號: XR16V2550ILTR-F
廠商: Exar Corporation
文件頁數(shù): 10/46頁
文件大小: 0K
描述: IC UART FIFO 16B DUAL 32QFN
標(biāo)準(zhǔn)包裝: 3,000
特點: *
通道數(shù): 2,DUART
FIFO's: 16 字節(jié)
規(guī)程: RS232,RS422
電源電壓: 2.25 V ~ 3.6 V
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:
帶CMOS:
安裝類型: 表面貼裝
封裝/外殼: 32-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 32-QFN 裸露焊盤(5x5)
包裝: 帶卷 (TR)
XR16V2550
18
HIGH PERFORMANCE DUART WITH 16-BYTE FIFO
REV. 1.0.3
2.18
Infrared Mode
The V2550 UART includes the infrared encoder and decoder compatible to the IrDA (Infrared Data
Association) version 1.0. The IrDA 1.0 standard that stipulates 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 Figure 11 below.
The infrared encoder and decoder are enabled by setting MCR register bit-6 to a ‘1’. When the infrared feature
is enabled, the transmit data output, TX, idles at logic zero level. Likewise, the RX input assumes an idle level
of logic zero from a reset and power up, see Figure 11.
Typically, the wireless infrared decoder receives the input pulse from the infrared sensing diode on the RX pin.
Each time it senses a light pulse, it returns a HIGH to the data bit stream. However, this is not true with some
infrared modules on the market which indicate a LOW by a light pulse. So the V2550 has a provision to invert
the input polarity to accommodate this. In this case user can enable MCR bit-2 to invert the input signal.
FIGURE 11. INFRARED TRANSMIT DATA ENCODING AND RECEIVE DATA DECODING
Character
Data Bits
Sta
rt
St
op
00
0
11
1
11
Bit Tim e
1/16 Clock Delay
IRdecoder-1
RX Data
Receive
IR Pulse
(RX pin)
Character
Data Bits
St
art
St
op
00
0
11
1
11
TX Data
Transm it
IR Pulse
(TX Pin)
Bit Tim e
1/2 Bit Tim e
3/16 Bit Tim e
IrEncoder-1
相關(guān)PDF資料
PDF描述
ATMEGA324PA-MUR MCU AVR 32KB FLASH 20 MHZ 44QFN
ST78C36CJ44TR-F IC UART FIFO 16B 44PLCC
XR16L2550IMTR-F IC UART FIFO 16B DUAL 48TQFP
XR16M780IL32-F IC UART FIFO 64B 32QFN
XR68M752IL32TR-F IC UART FIFO 64B DUAL 32QFN
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR16V2550IM 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述:
XR16V2550IM-0B-EB 功能描述:界面開發(fā)工具 Supports V2550 48 ld TQFP, PCI Interface 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
XR16V2550IM-F 功能描述:UART 接口集成電路 2.5V-3.6V 16B FIFO temp -45 to 85C;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
XR16V2550IMTR-F 制造商:Exar Corporation 功能描述:UART 2-CH 16Byte FIFO 2.5V/3.3V 48-Pin TQFP T/R 制造商:Exar Corporation 功能描述:XR16V2550IMTR-F
XR16V2551 制造商:EXAR 制造商全稱:EXAR 功能描述:HIGH PERFORMANCE DUART WITH 16-BYTE FIFO AND POWERSAVE FEATURE