| 摘要 |
The present invention provides a method for operating a TAP controller having a first input terminal (Etms) for inputting a logic test mode selection signal (tms) and a second input terminal (Etrst) for inputting a logic reset signal (trst); the TAP controller being configured in such a way that it is in a test mode if the test mode selection signal (tms) has a first logic state ("0"), and it is in no test mode if the test mode selection signal (tms) has a second logic state ("1"), that it can be reset asynchronously by single application of the logic reset signal (trst) from the first logic state ("0"); the method having the following steps: provision of an external logic reset signal (reset_n): formation of a logic ORing of the external logic reset signal (reset_n) and the inverted logic test mode selection signal (tms) for the generation of the logic reset signal (trst); and application of the logic reset signal (trst) generated by the logic ORing to the second input terminal (Etrst) The invention provides a corresponding TAP controller.
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