Can't seem to find this in the data sheet but what is the SPI boot ROM clock speed at boot up for a ADSP-2148x device ?
The default value of SPIBAUD register is 0x64. The SPICLK will be fPCLK/100. The PCLK value depends on the CLK_CFGx configuration chosen during booting. Please check the SPI port Booting section under the System Design chapter on the ADSP-214XX manual for more details.
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