I2C Communication Protocol

What does I2C stand for?

• Inter-Integrated Computer

• Internal-Interface Control

• Inter-Integrated Circuit

• Intelligent-Interface Communication

Which company invented the I2C protocol in 1982?

• Intel

• Philips Semiconductors

• Texas Instruments

• STMicroelectronics

How many communication lines does I2C primarily use?

• One

• Two

• Three

• Four

What are the two main lines in the I2C physical interface called?

• Data and Clock

• SDA and SCL

• TX and RX

• MOSI and MISO

In the context of I2C, what does SCL stand for?

• Serial Command Line

• System Clock Logic

• Serial Clock

• Slave Control Line

I2C drivers are described as "open-drain." What does this mean they can only do with their output?

• Drive it to logic 1 or logic 0.

• Ground the output or place it in a high-impedance state.

• Only drive it to logic 1.

• Only drive it to logic 0.

What is the primary purpose of the pull-up resistors on the SDA and SCL lines in an I2C bus?

• To increase the speed of data transfer.

• To prevent short circuits when multiple devices drive the lines.

• To ensure the lines are pulled high when devices are in a high-impedance state.

• To reduce power consumption.

Why is the I2C protocol also sometimes referred to as the "Two-Wire protocol"?

• Because it uses two power supply lines.

• Because it only allows two devices to communicate at once.

• Because it uses only two communication lines (SDA and SCL).

• Because it has two operating modes.

In an I2C master-slave configuration, who is responsible for generating the clock signal?

• The slave device.

• Either the master or the slave, depending on the operation.

• Only the master device.

• An external clock generator independent of master/slave.

What is the significance of the R/W bit in an I2C address packet?

• It indicates whether the slave is ready to receive data.

• It determines if the master will read data from or write data to the slave.

• It specifies the clock speed for the transaction.

• It acknowledges the receipt of the slave address.