punith m

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10 years, 7 months ago.

SD card memory size with SPI interface

Hello sir, This is punith we are working on some project where we got read and write data into micro SD card may i know what is the maximum size of SD card that can be interfaced with lpc 1768?

lpc1768 detects 2gb but not 8 gb why is this contraint? is this anything related to SPI interface or any other issue please reply sir, your valuable reply will help us a lot.

2 Answers

Christoph Gottschlih
10 years, 7 months ago.

Iam using a 16Gb SD Card and it works. So i dont know why the 8GB isnt working but a 16 GB is working.

Hi chris which file system is ur 16 Gb SD card?

posted by punith m 24 Apr 2014
Pavel Sadek
10 years, 7 months ago.

Hi

I would check the MBR of the FAT table, you can read the block size and their count there and easily check if it is incorrectly interpreted or incorrectly formatted. I expect you know the limits of FAT16 and you are using FAT32 :)

Pavel

Hi Pavel thanks for the reply.So do you say lpc 1768 doesn't support FAT 32.

posted by punith m 24 Apr 2014