Inter-Integrated Circuit(I2C)

[K Srinivas Pavan Kumar]

Can anybody say me what are the advantages of I2C (Inter Integrated Circuit)protocol

 

[KlausST]

Hi,

surely you have read a lot about I2C and other serial interfaces.

Now your question is very general. Please specificly ask what is not clear for you.

In what kind doyou need the advantage? Compared to what other interfaces?

Klaus

 

[K Srinivas Pavan Kumar]

Yes, I want advantages when compared to other protocols

 

[Kurenai_ryu]

Compared with SPI: I2C is slower (100kHz ~ 400kHz tops), SPI could be faster (1 MHz or more), I2C uses only 2 wires, SPi uses 3 or 4 wires commonly.

compared with RS232(UART): I2C is synchronous, UART is asynchronous, I2c can have a lot of devices in the bus, RS232 is only peer to peer (2 devices per 'bus')

compared with RS485(UART): I2C can have multiple masters, RS485 there can be only one master, I2c is for small distances (1m or less mostly for a single PCB), RS485 is for higher distances (up to 1Km in a well balanced line)

 

[FvM]

RS485 there can be only one master

Not generally true. PROFIBUS is a RS-485 based protocol supporting multi master.