Voltage Range PMOD

What voltage range should a signal be input to JB1 and JB2 in? Like if I run a wire with a pulse train and wanted to use the PL to count how many pulses had occured what should the height of my pulse train be so as not to break anything but still to be able to read it? Thanks!

0 deaxman over 12 years ago

Is the voltage 3.3v? That's what the Hardware users guide says but it seems a bit high.
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0 deaxman over 12 years ago

What is the low range for it to register as a high?
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0 bhfletcher over 12 years ago

The Pmod I/Os are tied to PL I/O banks with a Vcco of 3.3V. Depending on what IOSTANDARD you as the designer set for your signal will determine the thresholds. For example, if you set it up as LVCMOS33, you can look in the Zynq 7010/7020 DC and AC Switching Characteristics datasheet (DS187). According to that, Vih-min for LVCMOS33 is 2.000V, while Vih-max is 3.450V.
Bryan
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0 deaxman over 12 years ago

This is exactly what I was looking for, where did you find this documentation? It isn't off of the Zedboard main site that I can find. Thanks!
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0 bhfletcher over 12 years ago in reply to deaxman

Zynq 7010/7020 DC and AC Switching Characteristics datasheet (DS187) which you can get from www.xilinx.com

We don't repost the relevant datasheets for all the devices on ZedBoard so we refer you to the manufacturers of the various devices to get this information. You should also make sure you have access to the Zynq TRM from Xilinx as this will be critical to your success.
Bryan
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