topic MCF 52233 and SD card in ColdFire/68K Microcontrollers and Processors

MCF 52233 and SD card

Medx — Thu, 17 Sep 2009 20:32:42 GMT

Hello everybody,

I'm developing a product using MCF52233 and I need to make the microcontroller communicate with an SD card. I was wondering if it's possible to make all of the communication logic within the microcontroller, without the use of a secondary chip (Sd card controller) and, if that's not the case, which SD controller do you recommend? I realize that there are Sd card controllers modules in some of the chips in the CF family, but I couldn't find anything of the sort in the MCF52233 manual.

Thanks for your help,

Medx

Re: MCF 52233 and SD card

PaoloRenzo — Thu, 17 Sep 2009 23:20:40 GMT

SD card can be interfaced by SDIO interface or by SPI. For the first one, you need a special controller. For the second interface, it's a controller that is available in all the ColdFire family.

More details here:

http://en.wikipedia.org/wiki/Secure_Digital_card

There are some third parties that support SD interface with a mounted file system (FAT16, FAT32, etc).

As one of all the examples around, you can check AN3931 software. It uses a V1 MCU to handle SD with SPI with FAT16

Have fun

Re: MCF 52233 and SD card

Medx — Sat, 19 Sep 2009 00:22:13 GMT

Hello,

Thank you very much, Paolo. That AN is just what i needed. Concidentally, i was thinking of using an FAT16 format and comunicate via SPI just like its done in the AN.

Thank you Again,

Medx.