Post by ender on Nov 26, 2020 11:49:51 GMT
Did anyone ever figure out what the various pullups and serial resistors should be to get the SD card slot working on the Mini?
I've ordered the connectors now, and I found a datasheet for the Sunrom 3735 connector, with a schematic for a generic MicroSD slot.
They list 10K pullups on pins 3 (DI), 7 (DO) and 9 (CD). The only other thing in that schematic is a decoupling cap. But that schematic seems to refer to SPI mode. I also found a Stackexchange post with an answer to the effect that for SD mode, all the data lines need pullups, so that would be 1, 2, 3, 5, 7 and 8.
It's quite possible then, that all that's needed is to bridge all the series pads and add 10k pullups to all data lines, and it could work.
I've ordered the connectors now, and I found a datasheet for the Sunrom 3735 connector, with a schematic for a generic MicroSD slot.
They list 10K pullups on pins 3 (DI), 7 (DO) and 9 (CD). The only other thing in that schematic is a decoupling cap. But that schematic seems to refer to SPI mode. I also found a Stackexchange post with an answer to the effect that for SD mode, all the data lines need pullups, so that would be 1, 2, 3, 5, 7 and 8.
It's quite possible then, that all that's needed is to bridge all the series pads and add 10k pullups to all data lines, and it could work.
