ADSP-21477 how routing SPORTs in SRU matrix

Hello,

As you are stated correctly there are only 20 DAI pins and all the SPORT signals can be routed only through DAI pins. In case, if you application use same CLK and FS for all the 8 SPORTs, the Master CLK and FS can be routed to 2 DAI pins and these pins can be used to provide CLK and FS to all the SPORTs using SRU. 

For instance, if the master clock and FS arrives at DAI_PB01 and DAI_P02 respectively, it can be routed internally to other SPORT as given below.

// Tie the pin buffer input LOW.
SRU(LOW,DAI_PB01_I);

SRU(LOW,DAI_PB02_I);

// Tie the pin buffer enable input LOW
SRU(LOW,PBEN01_I);

SRU(LOW,PBEN02_I);

// Clock in from DAI01 connects to different SPORT_CLK input 
SRU(DAI_PB01_O, SPORT0_CLK_I);

SRU(DAI_PB01_O, SPORT1_CLK_I);

// FS from DAI02 connects to different SPORT_FS input 

SRU(DAI_PB02_O, SPORT0_FS_I);

SRU(DAI_PB02_O, SPORT1_FS_I);  

In other case if you want to connect internally generated SPORT clock or FS to other SPORTs, you can use as following
SRU (SPORT0_CLK_O , SPORT1_CLK_I);

SRU (SPORT0_FS_O, SPORT1_FS_I);

Best Regards,

Jithul

Hello,

As you are stated correctly there are only 20 DAI pins and all the SPORT signals can be routed only through DAI pins. In case, if you application use same CLK and FS for all the 8 SPORTs, the Master CLK and FS can be routed to 2 DAI pins and these pins can be used to provide CLK and FS to all the SPORTs using SRU. 

For instance, if the master clock and FS arrives at DAI_PB01 and DAI_P02 respectively, it can be routed internally to other SPORT as given below.

// Tie the pin buffer input LOW.
SRU(LOW,DAI_PB01_I);

SRU(LOW,DAI_PB02_I);

// Tie the pin buffer enable input LOW
SRU(LOW,PBEN01_I);

SRU(LOW,PBEN02_I);

// Clock in from DAI01 connects to different SPORT_CLK input 
SRU(DAI_PB01_O, SPORT0_CLK_I);

SRU(DAI_PB01_O, SPORT1_CLK_I);

// FS from DAI02 connects to different SPORT_FS input 

SRU(DAI_PB02_O, SPORT0_FS_I);

SRU(DAI_PB02_O, SPORT1_FS_I);  

In other case if you want to connect internally generated SPORT clock or FS to other SPORTs, you can use as following
SRU (SPORT0_CLK_O , SPORT1_CLK_I);

SRU (SPORT0_FS_O, SPORT1_FS_I);

Best Regards,

Jithul