Simple doubt with MMC / SD.

[Dave_25152]

Friends,

I need to know if I can connect an MMC / SD card to a microcontroller in order to have a memory expansion.

That is, I have a pic that will do some basic operations, but need to save many values. Can I use a 16F88 connected via SPI to a SD card?

I do not need to read the data on my computer ... the card will only be used to store values of the PIC.

I will use basic functions such as: write, read and delete, nothing more.



My thanks.

[asmallri]

[Dave_25152]

Thanks for the reply.

From the moment I have no SRAM, so I wanted to use the MMC / SD card instead.

But I need that much RAM? If you use the code "spi_write ()" PIC does not write the on the SD card?


Regards.

[Ttelmah]

Realistically, for 'memory expansion', consider an FRAM chip instead. Advantages, effectively instantaneous write, and 'byte' addressable, rather than having to work in blocks.
Smaller than you can get for a given dollar price than an SD card, but compared to the size of a PIC, even a 1Mbit chip, is a big area of memory.

Best Wishes

[Dave_25152]

OK, thank you both.

Then I shall have to await the arrival of RAM ...




With best wishes