MAX 10 JTAG overshoot

Hi,

Thank you for contacting Intel community.

If you have followed Intel Max 10 design guidelines and Intel Max 10 configuration userguide, overshoot should be prevented. Unless if you have a lot of board design or the board design is not correct then overshoot might occur, but it is a very rare case.

In Intel Max 10 configuration userguide mentioned, to prevent voltage overshoot, you must use external diodes and capacitors if maximum AC voltage for both VCCIO and JTAG header exceed 3.9 V. However, Intel recommends that you use the external diodes and capacitors if the supplies exceed 2.5 V.

Max 10 Design guidlines:

https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/max-10/m10_guidelines.pdf

Max 10 configuration userguide: https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/max-10/ug_m10_config.pdf

Thanks.

Regards,

Aiman