| 摘要 |
A boundary scan element comprising a plurality of input terminal side boundary cells allocated individually to respective input terminals and connected in series, a plurality of output terminal side boundary cells allocated individually to respective output terminals and connected in series, a TAP circuit for controlling the input of data to the input terminal side boundary cells and the output from the output terminal side boundary cells, a TDI terminal for inputting serial data to be fed to the boundary cells, a TDO terminal for outputting data from the boundary cells as serial data, a TCK terminal to which a clock signal is inputted, and a TMS terminal to which a mode signal for switching the operation mode of the TAP circuit is inputted, characterized in that the input terminal side boundary cells and the output terminal side boundary cells are connected in parallel between the TDI terminal and the TDO terminal; and a communication device made by using the same. |
