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ADSP21369 SPI SLAVE BOOT LOADER

Question asked by bruno2millau on Feb 18, 2011
Latest reply on Mar 2, 2011 by jeyanthi.jegadeesan

Hello,

 

I have a problème with an ADSP21369 in SPI slave boot load. The transfer of the SPI boot Kernel (384words) is OK only when the delay between 2 words (32bits) is more than 50ms. The host is a COLDFIRE MCF5328 used with 32bits emulated master SPI.

The configuration of my board is 1 ADSP21369, 1 FLASH SPAS29GL128P10TFI010, 1 SDRAM H57V1262GTR. The crystal frequency is 12.288MHz, boot config is SPI SLAVE and clock config is16 * 12.288MHz.

When the SPI loader runs, the host sends data every 150us and the load is always OK.

Diagram below shows timings after a start of the SPI slave.

 

spi.bmp

I would like to know if there is anything wrong in my design and why the delay between 2 words is so long.

 

Thanks in advance

 

Bruno

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