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Use of SC58x DAI not bonded off-chip

Question asked by swapp on Jul 12, 2017
Latest reply on Aug 18, 2017 by Jithul_Janardhanan

Hi all,

 

Our new design uses ADSP-SC584.

In 349 Balls CSP_BGA DAI0 and DAI1 pins 13-18 are not bonded off-chip.

We need to use PCGA and PCGB outputs as CLK/FS signals for DAI1 SPORTs.

For example to connect PCGA CLK to SPORT4 CLK we do the following:

...

SRU2(PCG0_CRS_CLKA_O, DAI1_PB19_I);

SRU2(DAI1_PB19_O, SPT4_ACLK_I);

...

 

Since we don't need to route PCGA CLK off the chip, I'm wondering if it is legal to use a not bonded DAI pin for this purpose, i.e. do the following:

 

...

SRU2(PCG0_CRS_CLKA_O, DAI1_PB18_I);

SRU2(DAI1_PB18_O, SPT4_ACLK_I);

...

 

Summarizing, is it possible to use not bonded DAI pins for internal routing purposes only?

 

Thanks.

BR

Andrea

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