AVR-Chat

Hi guys,

Ive googled it to death, and read all the app notes and data sheets I
could get my hands on, but clearly I havent read them hard enough!

Just a few questions if anyone has used them succesfully please.

1. As i read and understand it, can I only use 512byte block sizes for
single block writing in SPI mode ? Do I then have to write as a
minimum 512bytes of info everytime I write to the card ?

2. Can anyone enlighten me as to how the physical sectors work ? How
many blocks per sector etc ? As I understand it, I need to supply a
start address for all write / read instructions, just wondering how I
know what address to give to make sure I start at the edges of blocks
and stay in the same sector.

If anyone has written any notes etc. that may be useful they would be
greatly appreciated. 

Cheers
Hein B
Auckland, New Zealand.