hello,
i connected the panel card with my own PCB to use it as mobile device.
everything works fine, instead of the sd-card. during the boot of the panel-card i got the message:
mmc0: card claims to support voltages below the defined range. These will be ignored.
with the EVB this works fine, so it must be a problem with the hardware. i connected the sd-card reader(MULTICOMP - SDBMF-00915B0T2 - CARD, SD, PUSH/PUSH ) with the panel-card as shown in the technical manual of the panelcard. i also tried to use additional capacitors to debounce the signals.
is there anything i could have forgotten when connecting the sd-reader with the panel-card?
which voltages are meant in the error message?
Re: panel card with sd-card
Did you control the signal quality with a strobe? How do the signals look like?
A common problem is a not enough sized pull-up on the command line (MCCDA) it should be 6k8, on the data and clock lines it is 68k.