Communication device, communication system, and communication method

A communication device comprising:

• a communication unit configured to transmit a serial signal group conforming to an SPI and transmitted from a slave in synchronization with a clock generated on a basis of clock frequency information included in a packet from a communication partner device to the communication partner device as a batch of data blocks within one frame period of a predetermined communication protocol, or transmit the serial signal group to the communication partner device as a plurality of data blocks divided according to a plurality of frame periods.

A communication system comprising:

• a first communication device and a second communication device that transmit and receive a packet according to a predetermined communication protocol, wherein
• the first communication device includes a first communication unit that transmits a first serial signal group conforming to a serial peripheral interface (SPI) and transmitted from a master in synchronization with a clock to the second communication device as a batch of data blocks within one frame period of a predetermined communication protocol, or transmits the first serial signal group to the second communication device as a plurality of data blocks divided according to a plurality of frame periods, and
• the second communication device transmits a second serial signal group conforming to the SPI and transmitted from a slave in synchronization with a clock generated on a basis of clock frequency information included in the packet transmitted from the first communication device to the first communication device as a batch of data blocks within one frame period of the predetermined communication protocol, or transmits the second serial signal group to the first communication device as a plurality of data blocks divided according to a plurality of frame periods.

A communication method comprising:

• a communication unit configured to transmit a serial signal group conforming to an SPI and transmitted from a master in synchronization with a clock to a communication partner device as a batch of data blocks within one frame period of a predetermined communication protocol, or transmit the serial signal group to the communication partner device as a plurality of data blocks divided according to a plurality of frame periods.