The TCA9548A adapter is connected to an I2C device with multiple addresses on the I2C port on the main control board for normal communication and .There are 8 I2C interfaces on one expander, and there are eight bidirectional transfer switches can be controlled by I2C bus. This means after 1 expander is transferred, 8 addresses can be connected to the I2C port.When the 8 channel expansion board device is also in normal , the default address of this expander is 0x70, the address can be changed, and can be set within 0x70~0x77 according to your needs. In , 8 expanders can be cascaded in the address of 0x70~0x77, and each expander can 8 devices with the address. This realizes the I2C port and connects 64 devices with the address and uses normally.Expansion board TCA9548A compatible with IIC bus and system management bus (SMBus), low reset input, support for hot insertion, low standby current, no during -up, support for voltages between 1.8V, 2.5V, 3.3V and 5V buses Level shifting, TCA9548A I2C IIC multiplexer breakout board depending on the contents of the programmable control registers, any single SCn/SDn channel or combination of channels can be .When a timeout or other improper operation occurs, the system master can reset the TCA9548A by asserting the /RESET input low. Similarly, a -on reset deselects all channels and initializes the I2C/SMBus state machine. Reset and initialization can also be achieved by asserting /RESET and there is no need to the part. The switch has a turn-on gate so the VCC pin can be used to limit the maximum high voltage through the TCA9548A.Colour:PurpleMaterial:Plastic + MetalPackage Contents:6 x Multiplexer Breakout BoardOnly the above package content, other products are not included.Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.