On Tue, Aug 01, 2006 at 01:08:18PM -0400, B...@aol.com wrote: > > Can you plz gude for this question. How to
interface flash memory
> > cards to microcontroller for external memory excess?
> ====================================> Usually they have a serial interface
that uses a clock line and a data
That is true for many FLASH storage chips such as the Atmel AT45DB011.
FLASH memory cards such as Compact Flash have a parallel bus interface
which is a 50 pin version of PCMCIA which is similar to a 16 bit ISA bus
but with working hot swap and plug-and-play.
David Kelly N4HHE, d...@HiWAAY.net
computers would destroy, they must first drive mad.
Reply by BobG...@aol.com●August 1, 20062006-08-01
Can you plz gude for this question. How to interface flash memory cards to
microcontroller for external memory excess?
====================================Usually they have a serial interface that
uses a clock line and a data line. Most microcontrrollers have an SPI interface
that automatically shifts out the clock and data, but it is also possible to
write a subroutine that shifts each bit out and sets the clk line hi then lo for
each bit (usually called 'bitbanging'). So just study the data sheet for the
memory card and the microcontroller to see which lines need to connect to what
on the memory card, then write subroutines to so the low level read write
functions described in the datashett... read a sector, write a sector... usually
just a loop of reading or writing 524 bytes, or however many bytes in the memory
card block. Sound easy so far?
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Reply by partha pabbu●August 1, 20062006-08-01
Can you plz gude for this question.
How to interface flash memory cards to microcontroller for external memory
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