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I'm not allowed to draw more than about 30 mA until power supply negotiation is done. I tried to run the EPA with no resources allocated, will this reflect the consumption in reset?
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Is there any reason you cannot use another device for power supply negotiation?
For example, lets say this is a hot-swap board, or FMC module, or whatever it is that limits you to 30mA of power. You could use a microcontroller to negotiate the power with the main power source, and then that microcontroller can enable the hot-swap and power controllers to your FPGA. The microcontroller can then configure the FPGA. That same microcontroller can then monitor the power consumption and temperature of the FPGA and ensure it remains within spec.
If you really can only use the FPGA, then as FvM comments, you'll need to measure the current yourself. You'll need to measure the power-on dynamics very carefully though, as for example, the Stratix II devices draw several times more current on their VCCPD pins before settling to their 'on' levels. This is not something you find in the data sheet - I only found it as I have over-current protection built into all my FPGA designs, and it kept tripping during power-on.
Cheers,
Dave
Honored Contributor
