topic Re: SDHC Interface regarding. in Kinetis Microcontrollers

Re: SDHC Interface regarding.

Hui_Ma — Thu, 24 Oct 2013 07:40:16 GMT

SD card is different with RAM, Flash and other memory device, there is no memory address in Kinetis memory map.

Customer can access SDHC module to access SD card memory.

Wish it helps.

Re: SDHC Interface regarding.

yasararafath — Tue, 29 Oct 2013 12:19:32 GMT

Hi,

First I have tried the SD card with laptop and formatted the card with FAT32 FS. After this I am able to read and write directly with the help of UI(Windows).

During the write through Micro controller into the SD card it erases the BIOS Parameter block, so it is unable to write.

Later when we insert in the laptop it is saying no file system found format the removable disk.

How to preserve the BIOS parameter block of the SD card.

Waiting for your reply.

Thanking you,

-Yasar Arafath

Re: Re: SDHC Interface regarding.

Hui_Ma — Wed, 30 Oct 2013 07:47:06 GMT

I do a search with Google about FAT file system on SD card, please check attached pdf file, which shows how the FAT architecture on SD card.

The 512MB SD card map shows the data area from sector 220, which could be read and write.

You could find the file system MBR(master boot record) located at sector 0~0ED, which memory need be protected, no access is permitted.

Wish it helps.

Re: SDHC Interface regarding.

yasararafath — Wed, 30 Oct 2013 14:48:56 GMT

Hi,

Thank you once again.

It is given for FAT16 but I need is FAT32.

The information vastly available about FAT16 only. If you have any other reference please inform me.

Anyway I will also find in the meantime.