Is I2C bidirectional?

The I2C bus is a standard bidirectional interface that uses a controller, known as the master, to communicate with slave devices. Data transfer may be initiated only when the bus is idle. A bus is considered idle if both SDA and SCL lines are high after a STOP condition.

What is the difference between UART and I2C?

I2C, however, uses a master/slave configuration that uses clock signals to help synchronize the data being read or transmitted by the devices. UART, on the other hand, is hardware that is responsible for implementing asynchronous serial data streams for point to point connection and includes no clock signal.

Why I2C is open drain?

I2C is multi-master and multi-slave protocol. If the lines are not open drain then there may chance that one slave pulling the device low and other slave is trying to pull the same line high. This situation is called as the bus contention.

How does I2C protocol work?

I2C is a serial communication protocol, so data is transferred bit by bit along a single wire (the SDA line). Like SPI, I2C is synchronous, so the output of bits is synchronized to the sampling of bits by a clock signal shared between the master and the slave. The clock signal is always controlled by the master.

Is UART I2C?

The universal asynchronous receiver transmitter (UART) interface and the inter-integrated circuit (I2C) interface are two common serial communication interfaces. They both enable communication between the MSP430™ microcontroller (MCU) and another device, such as a personal computer (PC), another MCU, or a processor.

Is I2C open drain or push pull?

But actually i2c is open drain configuration, the device can’t pull the line high.It can only pull the line low. Whichever slave pull the line low will get control of the bus.

Is rs232 synchronous or asynchronous?

Synchronous Communication requires the sender and receiver to share the same clock. The sender provides a timing signal to the receiver so that the receiver knows when to “read” the data. RS-232 / RS-485 / RS-422 / TTL are the forms of Asynchronous Communications.

What acknowledgment signals are there in I2C bus?

Acknowledgement (ACK) and No Acknowledgement (NCK) Condition. Each byte transmitted over the I2C bus is followed by an acknowledge condition from the receiver, which means, after the master pulls SCL low to complete the transmission of 8-bit, the SDA will be pulled low by the receiver to the master.

What is I2C line?

I2C stands for Inter-Integrated Circuit. It is a bus interface connection protocol incorporated into devices for serial communication. It was originally designed by Philips Semiconductor in 1982. Recently, it is a widely used protocol for short-distance communication. It is also known as Two Wired Interface(TWI).

What is the difference between I2C and UART?

Like UART communication, I2C only uses two wires to transmit data between devices: SDA (Serial Data) – The line for the master and slave to send and receive data. SCL (Serial Clock) – The line that carries the clock signal. I2C is a serial communication protocol, so data is transferred bit by bit along a single wire (the SDA line).

What is Inter-Integrated Circuit (I2C) protocol?

The inter-integrated circuit or I2C Protocol is a way of serial communication between different devices to exchange their data with each other. It is a half-duplex bi-directional two-wire bus system for transmitting and receiving data between masters (M) and slaves (S). These two wires are Serial clock line or SCL and Serial data line or SDA.

What are the characteristics of I2C?

I 2 C uses only two bidirectional open-collector or open-drain lines: serial data line (SDA) and serial clock line (SCL), pulled up with resistors. Typical voltages used are +5 V or +3.3 V, although systems with other voltages are permitted. The I 2 C reference design has a 7-bit address space, with a rarely used 10-bit extension.

How many data bits are there in the I2C bus?

In addition to 0 and 1 data bits, the I 2 C bus allows special START and STOP signals which act as message delimiters and are distinct from the data bits. (This is in contrast to the start bits and stop bits used in asynchronous serial communication, which are distinguished from data bits only by their timing.)