Data transmitting/receiving device

摘要

The first data transmitting/receiving device according to the present invention includes: a serial-parallel conversion circuit for converting received first serial data to first parallel data; a data selection circuit for selecting any one of the first parallel data and externally-supplied second parallel data and outputting the selected data; and a parallel-serial conversion circuit for converting the first or second parallel data output from the data selection circuit to second serial data which is to be transmitted.