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What is the operation of the I2C bus?
The operation of the I2C bus is a read and write process between master and slave devices. There are mainly divided into 3 processes: Master device writes data to the slave device: The master device reads data from the slave device:
How are I2C bus drivers different from SPI and UART?
Unlike UART or SPI, I2C bus drivers are open-drain which prevents bus contention and eliminates the chances for damage to the drivers. Each signal line in I2C contains pull-up resistors to restore the signal to a high of the wire when no device is pulling it low.
How does the 10 bit address scheme affect I2C?
The 10-bit address scheme has two effects on the normal I2C protocol: The address frame now has two bytes instead of 1 byte. The first five most significant bits of the first byte is used to identify the 10-bit address with the convention being “11110”.
How does a slave device work in I2C?
Each signal line in I2C contains pull-up resistors to restore the signal to a high of the wire when no device is pulling it low. All transfers are initiated and terminated by the “master device”; the “master device” can write data to one or more “slave devices” or request data from the “slave devices”.
What should I watch out for in I2C routing?
The only thing to watch out for is capacitive coupling if you’ve got other nets with high dV/dt. Just keep somewhat away from those, or for extreme cases, put a deliberate ground trace between the IIC lines and the very noisy lines (probably between the noisy lines and anything else in your circuit if it’s so bad to need this).
Do you need to route I2C signals as differential pairs?
I2C Routing The I2C signals do not need to be routed as differential pairs, but it is recommended not to separate data and clock lines too much. It is not required to route the bus as a daisy chain, because the stub length is not a problem.
What is the purpose of the I2C protocol?
The Inter-integrated Circuit (I 2C) Protocol is a protocol intended to allow multiple “slave” digital integrated circuits (“chips”) to communicate with one or more “master” chips. Like the Serial Peripheral Interface (SPI), it is only intended for short distance communications within a single device.