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Slow SPI baud rate doing init code

Question asked by piniels on Jun 28, 2011
Latest reply on Jun 30, 2011 by PrasanthR



I am trying to make a USB powered device based on a BF525 costum board. This requires that I am able to boot in less then 100 ms.

I am booting from a SPI flash. I have modified the init code (\ldr\init_code\c\ADSP-BF527 EZ-KIT Lite) to fit our board. The problem is now that the reading of the init code from the SPI flash is slow (58.2 kHz) 230-240 ms. The application code is fast to read since the SPI_BAUD is set in the init code to 2 which gives a speed of 32 MHz on the SPI bus, so no problem with that.

Is there a way to increase the speed reading of the init code, other then set the OTP preboot registers?

I would like to avoid the OTP, since is could give some problems in production.


Regrads Peter Ilsoe