alopes wrote:

> Morning! i'm making a school work related with image capture using a
> microcontroller. 
> This work is totally new for me, reason why i'm having some difficulties. It
> consists in the using of a digital camera with 640 x 480 pixels resolution
> (VGA), that reads 30 frames per second. The microcontroller PIC24f is
> connected with a SD card where the data is stored. 
> I ask if it is possible to record directly the data in the SD card or if it
> is necessary a memory RAM connected to the microcontroller and what type? 
> I really appreciate any clarification. 

It's basic math: Your VGA camera is going to deliver three bytes (R, G, B)
per pixel, 307200 pixels, in 1/30 of a second, which represents a bandwidth
of 27.648 MB/sec.

There's no way the PIC24 can write data at this rate to an SD card, so you're
going to need to capture a video frame into external memory and then spend
several frame times transferring the data to the SD card. I hope you weren't
planning to capture continuous live video this way.

-- Dave Tweed
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