Part Number: PGA411Q1EVM
I am trying to connect the PGA411-Q1 EVM to the PGA41x-Q1 EVM GUI and there are a couple of things that I cannot seem to make it work. First, when I plug in the USB cable to my computer, the USB_RDY LED is constantly in a blinking state (I power on the device with 5VDC before I plug in the USB). There are random times when I can get the LED to stay solid, but when I do, the next problem happens; the GUI usually reads "Connection Status: connected" and "PGA41x-Q1 Device: Not Available." Based on the user manual, this makes me seems like the board isn't connecting. Every once in a while (totally random set of circumstances) the board will connect, and I get a status of "PGA41x-Q1 Device: Revision V111,11," which seems slightly odd. What can I do to make this work?
On top of that, when I probe the across the OE1 and OE2 pins, I don't see any excitation frequency.
If you have any advice, I would really appreciate it.
There is a trick to the EVM.
You should be seeing Revision v11.1 for the "PGA41x-Q1 Device" and 18.104.22.168 for the "USB Firmware" field.
If you don't have a resolver sensor connected, then the PGA411 will report a fault condition and you will not see anything on OE1 and OE2. Try holding the FAULTRES button on the EVM while monitoring OE1/OE2. Once you have the GUI working, you can also control the FAULTRES pin from the main page or the "Pin Configurations" page.
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In reply to Clancy Soehren:
What a trick! I'll give this a shot and report back. Just to be clear, if I don't have the resolver connected, I can hold the FAULTRES button and I should see the excitation frequency across OE1/OE2?
Side question: What current should the EVM board be drawing? I notice that the PGA411-Q1 chip immediately gets hot to the touch when I connect it to 5VDC. The board draws 0.98 Amps from my supply (seems high).
In reply to Manuel Ahumada:
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