Transcription of Devices Input and Output UNIT 4 INPUT OUTPUT DEVICES
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Devices Input and Output UNIT 4 INPUT OUTPUT DEVICES
75 INPUT and OUTPUT DEVICES UNIT 4 INPUT OUTPUT DEVICES Structure Page No. Introduction 76 Objectives 76 INPUT OUTPUT DEVICES 76 What is a Port ? 78 Parallel Port 78 serial Port 79 Universal serial Bus (USB) 79 Small Computer System interface (SCSI) Port 79 INPUT DEVICES 80 Keyboard 80 Mouse 81 Digitizing (Graphic) Tablet 82 Trackball 82 Joystick 83 Pick DEVICES 84 Light Pens 84 Touch Screens 84 Source Data Entry DEVICES 85 Digital Camera 85 Scanner 86 Optical Mark Reader (OMR) 86 Magnetic Ink Character Reader (MICR)
example of serial communication. It is a serial communication physical interface which transmits one bit at a time. Dial-up modems and serial mice use serial ports. Figure 4.2: Serial Port 4.3.3 Universal Serial Bus (USB) A USB Port can connect up to 127 peripheral devices such as a digital camera, digital speakers, scanners, speakers etc.
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