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Intel: Cyclone® 10 LP JTAG TDI/TMS is recommended to be pulled up to VCCA (+2.5V), but 2.5V pullup is fine even if VCCIO1 is connected to 3.3V. Huh?
Category: Configuration/Programming
tool:-
Device: Cyclone® 10 LP
Since JTAG pins do not have a clamp voltage, they are pulled up to 2.5V as a measure not to exceed the absolute maximum rating of 4.1V.
Basically, there is no problem as long as the voltage does not exceed 4.1V.
Please also refer to the following documents.
Intel® Cyclone® 10 LP Core Fabric and General Purpose I/Os Handbook
https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/cyclone-10/c10lp-51003.pdf
(Items in 6.1.4.3. JTAG Single-Device Configuration)
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