Question

What is the role of the MISO pin in the RFID Module?

(a) Master In Slave Out

(b) Manage Internal Slave Output

(c) Master Internal Search Optimization

(d) Manage Input Slave Op

I got this question during an online interview.

The query is from RFID Module topic in portion Interfacing of Sensors, Actuators, and Other Modules of Arduino

Answer 1

The correct choice is (a) Master In Slave Out

To explain: The RFID Module’s MISO pin acts as Master In Slave Out while the SPI Interface is activated, and as a serial clock when I2C Interface is enabled. However, when UART Mode is activated, it assumes the role of the Serial Data Output Pin.