data, the master sends a 1-15 us 0 volt pulse to start each bit. If the transmitting slave unit wants to send a "1", it does nothing, and the bus goes to the pulled-up voltage. If the transmitting slave wants to send a "0", it pulls the data line to ground for 60 us.

The basic sequence is a reset pulse followed by an eight-bit command, and then data are sent or received in groups of eight bits.

When a sequence of data is being transferred, errors can be detected with an eight-bit CRC

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