| 摘要 |
In an electronic chip, it is desirable for the scan cells to be able to be actuated individually during the processing of JTAG instructions. In a chip having a logic circuit which, during normal operation, receives input data via input buffers and/or forwards output data via output buffers and having scan cells which are arranged between the logic circuit and the input and/or output buffers and which, depending on a mode signal, input scan cell data into the logic circuit instead of the input data and/or forward scan cell data to the output buffers instead of the output data, this is achieved by virtue of the chip featuring at least one mode control cell which produces the mode signal and delivers it to the scan cells.
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