I have an iMX7 and Iris board. I have attached a display with a 40-pin connector, and have verified that this display works properly with a separate driver board.
Without the display, the Iris board starts up when powered.
With the display connected, the Iris LED flashes momentarily when powered up, and there’s a click, then the board is turned off.
I am suspecting maybe my display’s backlight is trying to draw too much current, given that it is a high brightness (800 Cd/m^2) display? But I cannot find specs on the Iris maximum current supply. Here are the specs for the display:
Forward voltage (V): min=17.8, typ=18.2, max=18.6
Forward current (mA): min=30, typ=40, max=50
Power consumption (W): typ=0.8
Is the problem possibly that the display draws too much current?
I looked more carefully and, though the pinouts on my display are similar, they are not identical (see clip from schematic attached). I am clearly going to have to come up with a way to remap the flex circuit pins from the Iris to those of the display.
I was hoping that I would avoid this tricky soldering job at this early stage of my project, but I guess this is inevitable.
If you folks at Toradex have a recommendation for a 480x272 display that would fit exactly, I would appreciate it! I have been in contact with EDTC and this display of theirs seems perfect but it has an incompatible 44- or 45-pin connector. I will continue following up with my EDTC rep.
Hi @ihab,
No, unfortunately we don’t have any 480x727 display which directly fits the FFC connector. I guess you are right and you have to go through building an adapter at that point.