I2C bus Learning (II)-data transfer format

Data transfer format

(1) byte Transfer and response

Each byte must be an 8-bit length. During data transmission, the highest bit (MSB) is first transmitted. Each transmitted byte must follow one response bit (that is, a frame has nine digits ).

(2) data frame format

After the start signal, a slave address (7 bits) must be transmitted. The 8th bits are the data transmission direction bits (R /), "0" indicates that the host sends data (T), and "1" indicates that the host receives data (R ). Each data transmission always ends with the termination signal generated by the host.

Note: shadow indicates that data is transmitted from the host to the slave, and shadow indicates that data is transmitted from the slave to the slave.A Indicates a response, indicating a non-response (high level ). S indicates the start signal, and P indicates the end signal ..

Example: