Data transmission method and apparatus, circuit board, storage medium and electronic apparatus

A circuit board, comprising:

• a chip, and an analog-to-digital/digital-to-analog (AD/DA) converter,
• wherein a first transmission channel is constituted with invalid bits in a second transmission channel, wherein the second transmission channel is configured to transmit second data between the chip and the AD/DA converter, and the second data comprises traffic data, wherein the invalid bits comprise at least one of:
• a fixed invalid bit in the second transmission channel, wherein the fixed invalid bit is a preset invalid bit in the second transmission channel, and the fixed invalid bit does not carry the second data;
• or a superfluous invalid bit in the second transmission channel, wherein the superfluous invalid bit is the invalid bit superfluous for a bit width required by the second data in the second transmission channel;
• wherein first data are transmitted between the chip and the AD/DA converter through the first transmission channel, wherein the first data comprises customized data, wherein the first data are transmitted through a first data transmission unit in the first transmission channel;
• wherein the first data transmission unit comprises at least one of:
• a type bit, a payload bit, a check bit, a start bit, a stop bit, a transmission validity time start bit, or a transmission validity time end bit, wherein the type bit is configured to indicate a type of the first data transmission unit, the payload bit is configured to transmit the first data, the check bit is configured to check the first data transmission unit, the start bit is configured to indicate a start boundary of the first data transmission unit, the stop bit is configured to indicate an end boundary of the first data transmission unit, the transmission validity time start bit is configured to indicate that transmission validity time starts, and the transmission validity time end bit is configured to indicate that the transmission validity time ends.

A data transmission apparatus, comprising

• a transmission circuit configured to:
• constitute a first transmission channel with invalid bits in a second transmission channel, wherein the second transmission channel is configured to transmit second data, and the second data comprises traffic data, wherein the invalid bits comprise at least one of:
• a fixed invalid bit in the second transmission channel, wherein the fixed invalid bit is a preset invalid bit in the second transmission channel, and the fixed invalid bit does not carry the second data;
• or a superfluous invalid bit in the second transmission channel, wherein the superfluous invalid bit is the invalid bit superfluous for a bit width required by the second data in the second transmission channel;
• and
• transmit first data through the first transmission channel, wherein the first data comprise customized data, wherein the first data are transmitted through a first data transmission unit in the first transmission channel;
• wherein the first data transmission unit comprises at least one of:
• a type bit, a payload bit, a check bit, a start bit, a stop bit, a transmission validity time start bit, or a transmission validity time end bit, wherein the type bit is configured to indicate a type of the first data transmission unit, the payload bit is configured to transmit the first data, the check bit is configured to check the first data transmission unit, the start bit is configured to indicate a start boundary of the first data transmission unit, the stop bit is configured to indicate an end boundary of the first data transmission unit, the transmission validity time start bit is configured to indicate that transmission validity time starts, and the transmission validity time end bit is configured to indicate that the transmission validity time ends.