LXSDF T2 is defined differently between Tx and Rx. In this context, Tx and Rx mean transmission and reception respectively and the direction of communication as the device communicated with host. Tx means transmitting data from device to host. Rx means receiving the data from the host transmitted.

LXSDF T2 Rx data format is very simple because data contents transmitted from host to device is not asked to transmit large bytes  while LXSDF T2 Tx data format transmitting data from device to hosts is able to transmit various information when it can handle series of dozens ~ hundreds bytes in one packet. The host side receiving the data from device needs the method to detect the starting spot of packet.