I'm using the EVAL-AD7292SDZ board to test a Linux driver. AD7292 has a GPIO6/BUSY pin which the eval board redirects to connector J5-7. However, I found no information about the numbering of the pins on the J5 connector. Could anyone provide me the pinout of this connector?
The evaluation board user guide sais I need to change solder link 6 (SL6) from position A to B for the board to redirect the BUSY signal to J5-7. The soldering points of SL6 are small dots about the same size the tip of my 30W soldering iron. I'm afraid of harming the eval board trying to resolder the contacts. Is there any other way to redirect GPIO6/BUSY pin to the J5 connector?
A PDF of the design files with the information you are looking for is on the evaluation board page at this link.
I see the many printing layers in Layout_AD7292SDZ_RevA.pdf but I can't figure out the pin layout (a.k.a. pinout) of the J5 connector. I mean, which GPIO is connected to each pin of J5?
The layers show the header has twelve pins being eleven of them drawn as circles and one as a square. Trying out a bit of ASCII art, J5 connector looks like this:
O O O O O |_|
O O O O O O
I would like to know, for instance, what GPIO is connected to the squared pin of J5.
You need to look at the schematic PDF file within the file folder....Schematic_ad7292SDZ_RevA3
After a few days I realized it was enough to test continuity between the SL links and the J5 pins to figure out the J5 connector pinout. For the sake of answering the question, the layout I found is:
11 9 7 5 3 1
12 10 8 6 4 2
Something I learned from Wikipedia (https://en.wikipedia.org/wiki/Pin_header) was that the solder pad around the hole of pin 1 is often square rather than round. Apologies for not noticing that before. So, in this particular case, pin J5-1 (the squared one) is tied to AD7292 GPIO0 when SL0 is in position B.
Now I know where the J5-7 pin is, but can't get any signal from it. This, however, shall be tackled in a separate thread.
Sorry for any trouble. Thanks for all your replies.