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Gabriel Brito

vcc pin on pmod connector without voltage - Spartan 6e Atlys Board

Question

Hi
I'm trying to transmit digital signals through a cable. In orther to avoid noise, I am using a differential output (LVDS) to transmit the information from the FPGA to a Cable.  At the end of the cable, I'm using a converter to convert the differential signal to a single-end signal (LVDS to Single End converter). For that I need to feed my converter circuit through pin 6 of pmod connector (pin6 = vcc pin = 3.3V).

Initially everything was working properly. However the other day, I switched on the board again (Atlys Board) and checked that I no longer have vcc on pin 6 (pin6 = vcc pin = 0V). Can anyone explain what's going on? Is the board damaged?

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Hi @Gabriel Brito,

Is pgood ld15 on when you turn the Atlys on? Can you measure voltage on C157 with a DMM. C157 is on the top right hand corner near the letter A on the Atlys silk screen label.

cheers,

Jon

Edited by jpeyron

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