13.22.6.1 Host dsPIC DSC to MOSFET Gate Driver

Messages sent from the host dsPIC DSC to the MOSFET Gate Driver consist of either one or two 8-bit bytes. The first byte transmitted is the command byte. The second byte transmitted, if required, is the data for the command.

If a multibyte command is sent to the MOSFET Gate Driver and no second byte is received by the MOSFET Gate Driver, then a “Command Not Acknowledged” message will be sent back to the host afterwards. The host must start sending the 2nd byte of a two-byte command within 1 ms of completion of the first byte to prevent a NACK message. Once the second byte Start bit is received, the MOSFET Gate Driver internal receiver logic will handle the reception of the data byte. If the data byte Stop bit is not received within the expected reception time for the last received bit, the driver will respond with a NACK message.