Data transmission device

The utility model discloses a data transmission device, it includes: clock generator, register, encoder, clock recovery unit, decoding units and output data buffer unit, wherein, the encoder is used for the data shift clock according to clock generator output to according to predetermined frame structure, send data and the data length of saving in the register by the one data line, send the in -process to saltus step along the expression data of signal, signal on the sampling clock sample data line that decoding units is used for producing according to the clock recovery unit to decode out according to predetermined frame structure and export after the data, and when the high level that detects or low level time exceed 2 sampling clock cycle, send the data transmission error message. Use the utility model discloses, can guarantee data transmission's real -time, and, in saltus step along the expression data of data transmission in -process with the signal, support to transmit the short -term test of makeing mistakes, improved data transmission's reliability and validity.