TMS320C6455: TIMINGS OF PCI

Hi ,

I have three custom Boards(Board A, Board B, Board C)

Board A <- C6455 DSP (configured as PCI master)

Board B <- C6455 DSP (configured as PCI slave)

Board C <- COTS (configured as PCI slave)

I have configured PCI to run at 66MHz, I am using EDMA to read the data from PCI configured memory to L2 memory.

1. From Board B to Board A ,when i measured timing for 37000 words (32 bit ) , it is 2.6 msec.

2. From Board C to Board A ,when i measured timing for 37000 words (32 bit ) , it is 980 us.

Can somebody please explain me?

Thanks in advance

Regards,

Rakesh