Article ID: 000081057 Content Type: Troubleshooting Last Reviewed: 02/13/2006

Why did the JTAG reset pin name change from nTRST to TRST?

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Description The IEEE Std. 1149.1-1990 JTAG specification uses TRST as the correct naming convention for the JTAG reset pin. Although Altera changed the name to TRST to comply with the guidelines, the functionality of the pin did not change. The JTAG circuitry is reset when TRST is low.

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