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Can a tca9548a multiplexer be used for fast I2C?
The multiplexer supports both normal (100 kHz) and fast (400 kHz) I2C protocols. All I/O pins of TCA9548A are 5-volt tolerant and can also be used to translate from high to low or low to high voltages. It is a good idea to put pull-up resistors on all channels of TCA9548A, even if the voltages are the same.
What do you need to know about the tca9548a breakout?
The TCA9548A Breakout enables communication with multiple I2C devices that have the same address making it simple to interface with them. For this tutorial we need: – Arduino Uno/Nano whatever is handy – Few 0.91 & 0.96 I2C OLED displays We will start our discussion by understanding the basics of the I2C technology
How is the tca9548a used in Arduino?
The TCA9548A may also be used for Voltage Translation, allowing the use of different bus voltages on each SCn/SDn pair such that 1.8-V, 2.5-V, or 3.3-V parts can communicate with 5-V parts. This is achieved by using external pull-up resistors to pull the bus up to the desired voltage for the master and each slave channel.
Why are all I / O pins of tca9548a 5 volt tolerant?
All I/O pins of TCA9548A are 5-volt tolerant and can also be used to translate from high to low or low to high voltages. It is a good idea to put pull-up resistors on all channels of TCA9548A, even if the voltages are the same. The reason for this is because of the internal NMOS switch.
Can a tca9548a be used in a 5 volt mode?
All I/O pins of TCA9548A are 5-volt tolerant and can also be used to translate from high to low or low to high voltages. It is a good idea to put pull-up resistors on all channels of TCA9548A, even if the voltages are the same.
How does an address byte of the tca9548a look like?
This is how an address byte of the TCA9548A looks like. First 7-bits combine to form the slave address. The last bit of the slave address defines the operation (read or write) to be performed. When it is high (1), a read is selected, while a low (0) selects a write operation.
How is data transferred in an I2C multiplexer?
I2C is a ‘short distance’ ‘serial communication protocol’, so data is transferred ‘bit-by-bit’ along the single wire or the SDA line. The output of bits is synchronized to the sampling of bits by a clock signal ‘shared’ between the master and the slave. The clock signal is always controlled by the master.