Lpc2000

Hi
There have been a few messages about this, but I can't find anything 
explicit so I thought I would ask a quick question.

In an FIQ I need to transfer 15 bytes to an external device in less 
than 1uS.

Is this possible? Unless I am completely off track (probable), it 
looks like it should be.

The bus is 8-bit with no wait states. We are using the PLL to give a 
60MHz core clock and the peripheral clock is set equal to the core 
clock. The MAM is enabled.

I can't seem to achieve anywhere near this figure.

Any thoughts would be greatly appreciated.

many thanks
Simon