What is an I2C MUX?

What is an I2C MUX?

Introduction. On the same I2C port, DFRobot Gravity: I2C Multiplexer solves the address conflict and enables the normal communication with multiple same-address I2C devices.

What is an I2C switch?

I2C is a two-wire communication protocol known for its simplicity. The easiest solution is to use a four-channel I2C switch. The I2C switch will have its own unique I2C address and will require you to write to its internal register in order to set which channels will be on at a time.

How does I2C MUX work?

I2C Multiplexer TCA9548A

1. VIN Pin. Connect the VIN pin from the board to either 5V or 3.3V output from the Arduino.
2. GND Pin. Connect the GND pin from the board to the GND from the Arduino.
3. SDA Pin. Connect the SDA pin from this board to the SDA line from the Arduino.
4. SCL Pin.

What are I2C sensors?

The I2C bus is a simple and flexible way to transfer digital data between two electronic devices which may be physically seperate or contained on the same printed circuit board (PCB). I2C is the bus of choice for many sensors between many vendors.

Is SMBus an I2C?

SMBus is built on I2C and is therefore generally compatible with I2C devices, though not in all respects. I2C allows several modes, Standard, Fast and High-Speed. Standard mode allows clock frequencies as high as 100kHz while Fast and High-Speed modes are faster.

Is the tca9544a the same as an I2C MUX?

The two chips are NOT the same: The TCA9544A is an I2C Mux. An I2C Mux multiplexes any one of N downstream ports to the upstream port (1 to 1). The TCA9546A is an I2C Switch. An I2C Switch connects one or more of the N downstream ports to the upstream port (1 to many).

What are multiplexers and switches for I 2 C?

I 2 C Multiplexers/Switches Our vast portfolio of I 2 C logic products includes a selection of multiplexers and switches for connecting an upstream I 2 C-bus to any combination of downstream I 2 C buses. Multiplexers (muxes) and switches fan the input I 2 C/ SMBus signals to two, four, or eight downstream channels of SCx/SDx pairs.

What kind of I2C switch do I Need?

TCA9548A-Q1 – Automotive 8-channel 1.65- to 5.25v I2C/SMBus switch with reset & voltage translation

Do you need a reset pin for I²C multiplexers?

Control is performed directly through the I 2 C/ SMBus, so there’s no need for an additional control pin. The muxes select one downstream channel at a time; the switches can select one or more. Some devices have an external active-low hardware reset pin (RESET).