We are running a survey to help us improve the experience for all of our members. If you see the survey appear, please take the time to tell us about your experience if you can.
Is it possible to interface an SD card to LPC214x? Is it easier to work with the LPC1767/8 which already has a SD card interface? I know the Olimex board comes with an SD card connector, has anybody used it?
It is possible to interface an SD card to any microcontroller that has an SPI port.
"Is it easier to work with the LPC1767/8 which already has a SD card interface?"
That really depends on your capabilities and what you find "easy"!
I've only used the SPI interface, but it looked to me that the protocol on the "full" interface was more involved...
"the (sic) Olimex board"
Olimex make lots of boards - you need to state specifically which one you are talking about!
The full SD specification is closed access - you need to buy it and pay membership fees. Documentation for SPI access can be found - and a lot of example code for different prcoessors.
The free documentation also describes a "simplified" protocol on the SD interface:
www.sdcard.org/.../
but it still seemed to me to be more involved than the protocol over SPI.
Maybe I should rephrase...I want about 1 Mb space to store data and which will be erased almost continuously. So should I try to interface an SD card or go for EEPROM? Thanks for your pointers about SD interfacing.
that's not a "rephrase" - that's a total change of subject!
"... will be erased almost continuously. So should I try to interface an SD card or go for EEPROM?"
Neither!
Neither of them is really suited to continuous erasing!
If it's only 1MB, wouldn't SRAM do?
How about FRAM?