Question

What is the use of the AD0 pin?

(a) I2C Slave Address LSB Pin

(b) SPI Master Address MSB Pin

(c) UART Slave Address LSB Pin

(d) UART Master Address LSB Pin

I have been asked this question in my homework.

My enquiry is from MPU6050 Sensor Module in chapter Interfacing of Sensors, Actuators, and Other Modules of Arduino

Answer 1

Right option is (a) I2C Slave Address LSB Pin

Explanation: The AD0 pin is the I2C Slave Address LSB pin on the MPU 6050. This is 0th bit in 7-bit slave address of device. If connected to VCC then it is read as logical HIGH and slave address changes.