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ADSP-SC598 Pre release
Reaching speeds of up to 1 GHz, the ADSP-SC598/SC596/SC595 processors are members of the ADSP-SC59x SHARCÂ® family of products. Containing the same dual...
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ADSP-SC598 on Analog.com

Can the ADSP-SC598 PCG generate 24.576MHz from 25MHz input clock?

mattp

on Sep 3, 2024

Category: Datasheet/Specs

Product Number: ADSP-SC598

We are working with a board which has the ADSP-SC598 connected to an audio codec which requires a clock of 24.576MHz.

But the ADSP-SC598 only has a 25MHz clock going to SYS_CLKIN0 and SYS_CLKIN1.

Can we use the ADSP-SC598 PCG to generate 24.576MHz from 25MHz input clock?

-Matt

removing the word "master".
[edited by: mattp at 3:10 AM (GMT -4) on 4 Sep 2024]

0 NandiniC

on Sep 4, 2024 8:56 AM
Hi,

Can we use the ADSP-SC598 PCG to generate 24.576MHz from 25MHz input clock?
>> Yes, the 24.576MHz frequency can only be provided externally and input through DAI. This ADSP-SC598 will not generate a 24.576MHz signal on its own using a 25MHz crystal.

We would suggest you refer the below FAQ link:
https://ez.analog.com/dsp/sharc-processors/adsp-sc5xxadsp-215xx/w/documents/32316/adsp-sc594-spdif-example

In this example, we are providing the 24.576Mhz input to the PCG from the DAI pin externally. This will be done by the SRU ("SRU(DAI1_PB03_O,PCG0_EXTCLKA_I);").
Note: There is a typo in the Readme block diagram. DAI103 actually takes 24.576 MHz not 25.476MHz

Regards,
Nandini C
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Can the ADSP-SC598 PCG generate 24.576MHz from 25MHz input clock?