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car83
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Voici la réponse à ton problème apporter par Microchip dans son datasheet AN572 (page8) datant de 1999.

je cite:
Citation:
Question: I am using a 93LC56 device in my application and
am having problems getting it to work correctly. The
read sequence seems to work fine but I unable to
write any data to the part.

Answer: A problem such as this is usually caused by either
not giving the part the required number of bits for the
command before dropping the CS line, or not drop
ping the CS line at all. The write command will not
commence until the CS line is brought low
En gros ton programmeur initialise par correctement la séquence d’écriture...

Source: http://ecee.colorado.edu/~mcclurel/man572.pdf
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