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Ad13's avatar
Ad13
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4 years ago

JTAG - CLK Pin limited to 0.7V

I have 2 x custom boards with 10CX085YU484E6G and a MT25QU01GB flash device that have been working fine. However, for some reason Quartus changed the device and when I last programmed the FPGA and F...
Ad13's avatar
Ad13
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4 years ago

Hello Aiman,

Thanks for your input.

While the certificate had indeed expired, fixing that issue did not solve my problem. This is verified on 3 different PCs with multiple JTAG cables (USB Blaster 1 and 2).

Interestingly on one setup doing Autodetect does detect a device but with an unknown ID (UNKNOWN_2EF20DD). Screenshot attached.

I have also noticed with USB Blaster 1 the clock gets to about 400mV, and on USB Blaster 2 the clock is about 0.7V.

Many thanks.

Adrian.