How do I use I2C bus?

How do I use I2C bus?

A basic Master to slave read or write sequence for I2C follows the following order:

1. Send the START bit (S).
2. Send the slave address (ADDR).
3. Send the Read(R)-1 / Write(W)-0 bit.
4. Wait for/Send an acknowledge bit (A).
5. Send/Receive the data byte (8 bits) (DATA).
6. Expect/Send acknowledge bit (A).
7. Send the STOP bit (P).

What is the I2C bus what is its uses?

Transmitting and receiving the information between two or more than two devices require a communication path called as a bus system. A I2C bus is a bidirectional two-wired serial bus which is used to transport the data between integrated circuits. The I2C stands for “Inter Integrated Circuit”.

How many devices can we connect on I2C bus?

As a result of using 7-bit addresses the I2C protocol is limited to 127 unique devices connected to one bus (or pair of data and clock lines). The speed of the I2C bus is fixed, typically to 100khz, 400khz, or 1mhz.

What does terminating I2C bus mean?

The termination of I2C lines is achieved by connecting the bus to the reference voltage of the bus over an appropriate resistor. Missing or wrong termination is the source of many field problems. As a rule of thumb, the higher the termination the better the signals. On the other hand a high termination bares a potential risk of damaging components.

Which is better, SPI or I2C?

Overall, SPI is better for high speed and low power applications while I2C is better for suited for communication with a large number of peripherals and dynamic changing of the master device role among the peripherals on the I2C bus.

What is the difference between UART and I2C?

In UART its peer to peer communication, whereas in I2C its general broadcast. the clock in I2C is always generated by master only and all the slaves are dependent on the master clock for communication. In UART, each device has its own clock.