14.5.4.2 DATA[15:0], #OE and VALID Lines
16-bit data are exchanged between the target device and the host through the DATA[15:0] lines. This data transfer can be bidirectional. The level of the #OE line, driven by the host, indicates the direction of the transfer:
- 0: target device to host (output data)
- 1: host to target device (input data)
Input data are always sampled by the target device at the beginning of any command but output data can only be sent by the target device then sampled by the host at the end of DATA commands.