Importance

Loading Importance Indicators...

Abstract

A communication system includes boundary scan elements each having a plurality of boundary cells individually assigned to respective input terminals and output terminals, a TAP circuit for controlling input and output of data, a TDI terminal and TDO terminal for inputting or outputting serial data, a TCK terminal to which a clock signal is input, and a TMS terminal to which a mode signal for switching the operation mode is input; a plurality of terminal units connected with the respective boundary scan elements; and a communication controller connected in series with the boundary scan elements for individual control of the terminal units. Incoming communication lines between the boundary scan elements adjoining each other, and between the boundary scan elements and the communication controller, and an outgoing communication line between the communication controller and the boundary scan element positioned at the backmost are formed.

Loading the Abstract Image...

First Claim