Thanks you Alf,
not very sure about Cogent people but I may be lucky.
My main concern with the board today is that I make a daughterboard to add a TWI eeprom to boot on it and I have two distinct problems :
* sometimes the at91rm9200 boots on the eeprom and sometimes not (and send 'C' char on the debug uart)
* I put in the eeprom the program I normally use directly in the internal sram (and which works) and it seems that there is a problem with the initialization of the clocks/PLL system because the program hang on

.
any idea ?