[U-Boot-Users] Flash Replacement for AT91RM9200-EK

[Erdmann, Thomas]

Hello List,
i use a custom Board based on the AT91RM9200-EK.
Now i want to Replace the Nor Flash AT49BV6416 by a larger one from
Spanion.
The older Atmel chip specifies 70ns Access Time, 
the most usual Spanion chips are slower in the 100ns Range.
As i read the CPU Datasheet correct at 60MHz EBI Speed the slowest
Factor 1/4 gives 67ns Cycle Time.
Does anyone know, how Access Time for the parallel Flash is calculated
and what Speed Grade is needed for a stable U-Boot out of it ?
Could a slower (100ns) Chip be used, how can this be adjusted ?
Are there any additional Parameters for the Flash Chip to care of (Burst
Mode, Multi Bank) ?

Thanks 
  Thomas