IR Serial Data Link (IRDA) Features - Sunrom Technologies

For more products visit our website http://www.sunrom.comDocument: Datasheet Date: 6-Jun-12 Model #: 1165 Product’s Page: www.sunrom.com/p-1128.htmlIR Serial Data Link (IRDA)IR Serial Data Link(IrDA) can transmit and receive serial data through wireless infrared. This is asimple and low cost way to achieve wireless serial data transmission. There is one limitation that thebaud rate at which it can transmit is at 2400 bps only and only half duplex communication can beestablished.Half Duplex means the unit caneither transmit or receive data atsame time. Both transmit and receivecannot happen together in sametime.Its great where you want to remotetransmit strings like sensor readingsor perform remote controlapplications. The protocol used isIrDA that is widely used in point topoint infrared serial communications.Features• Setup Wireless Serial Data Easily• Low Cost & Easy to Use• Fixed 2400 Baud Rate• 5 meter range (Line of Sight)• Half Duplex Communication• Works with any microcontrollerBack View showing IrDA Controller

SpecificationsName Min Typ Max UnitWorking Voltage 4.5 5 5.5 VFrequency of Operation 40 KhzTypical Operating Range 5 metersUART baud rate (8 bit data, no parity, 1 stop bit) 2400 bpsPin definitionPin Pin Name DetailsRX-IN Receive Input Input serial data of 5V logic level, Usually connected to TXD pin ofmicrocontrollers.TX-OUTTransmit Output Output serial data of 5V logic level, Usually connected to RXD pin ofmicrocontrollers.+5V Power Supply Regulated 5V supply input.GND Ground Ground level of power supply. Must be common ground withmicrocontroller.2Sunrom Technologies Your Source for Embedded Systems Visit us at www.sunrom.com

Interfacing with microcontrollerIt’s very easy to interface with microcontroller having UART at 5V level. Configure yourmicrocontroller to communicate at 2400 baud rate and you are ready to receive or transmit.Due to nature of IR Link, It would happen that whatever you transmit will also reflect back to itsreceiver RXD pin. So when you transmit make sure you do not check received data at same time.For example if you are implementing receive interrupt, disable it before transmission. After transmitis done you can enable receive interrupt.VCCVCCC210uF 16VR310K39383736353433321234567831+9U1AT89S52P0.0/AD0P0.1/AD1P0.2/AD2P0.3/AD3P0.4/AD4P0.5/AD5P0.6/AD6P0.7/AD7P1.0/T2P1.1/T2EXP1.2P1.3P1.4/SSP1.5/MOSIP1.6/MISOP1.7/SCKEA/VPPRSTGND20VCC 40XTAL119C1100nP2.0/A8P2.1/A9P2.2/A10P2.3/A11P2.4/A12P2.5/A13P2.6/A14P2.7/A15P3.0/RXD 10P3.1/TXD 1112P3.2/INT013P3.3/INT114P3.4/T015P3.5/T116P3.6/WR17P3.7/RDXTAL2182122232425262728PSEN 29ALE/PROG 30Y1VCC4321CN1Serial IR Link Model: 1165RX-INTX-OUT+5VGNDC433p11.0592C533p3Sunrom Technologies Your Source for Embedded Systems Visit us at www.sunrom.com

Dimensions4Sunrom Technologies Your Source for Embedded Systems Visit us at www.sunrom.com