MMC card interface

for bbc micro/electron hardware, peripherals & programming issues (NOT emulators!)
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Re: MMC card interface

Postby KenLowe » Wed Apr 11, 2018 9:31 pm

I've made a slight modification to the wiring of the ribbon cable for my MicroSD reader, and I now no longer need to modify the MicroSD adaptor to get it working. I'm only using 6 wires, but with a bit of re-wiring at the IDC connector, I can get it all working and looking quite neat. The main trick was to double back one of the cores so that it was wired into two pins on the IDC connector. A bit fiddly to do, but the end result is quite nice:

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Re: MMC card interface

Postby DutchAcorn » Thu Apr 12, 2018 11:18 am

This looks clean, and there is no soldering required, but I've made a few of these and in my experience this configuration can give connection issues over time. The IDC connection is ok for a straight flat cable, but with twists and turns in the individual wires it is not so great. Imo soldering on the MMC interface side gives the most stable solution.

But as long as it works, it works! :D