Devices and Buses for Device Networks By: Prof. Mahendra B. Salunke Asst. Prof., Department of Computer Engg, SITS, Pune-41 URL: microsig.webs.com

Contents I/O Devices Serial communication Handshaking Signals Synchronous, Iso-synchronous and Asynchronous Communication Parallel Port Devices Handshaking Signals Timer and Counting Devices Software Timer Bus Architectures

I/O Devices Types and Examples of I/O Devices –Serial Input –Serial Output –Serial UART input –Serial UART output –Parallel Port single bit input –Parallel Port single bit output –Parallel Port Input –Parallel Port Output

Serial Communication

Handshaking Signal

Synchronous, Iso-synchronous and Asynchronous Communication Synchronous: A byte or a frame of the data is transmitted or received at constant time interval with uniform phase differences. Bits of a data frame are sent in a fixed maximum time interval. In Iso-synchronous communication, the maximum time interval can be varied. Asynchronous: Bytes need not maintain a constant phase difference and are asynchronous, Bytes or frames can be sent at variable time intervals

Parallel Port Devices

Handshaking Signals

Timer and Counting Devices

Software Timer

Bus Architectures I 2 C CAN ISA PCI HDLC Bluetooth

I2CI2C

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