SN65DP159: Schematic check of SN65DP159

Hi,

Please see attached for my review comment.

5483.SN65DP159_TI_Reviewed_01042022.pdf

Thanks

David

Hi David:

We have been modified our schematic.

Please help to check again, and we don't understand that mean of "add the DDC snooping option".

Would you please help to explain?

Thanks a lot.

SN65DP159_update.pdf

Hi,

The updated schematic looks OK. For DDC snooping option, 

The SNx5DP159 uses clock stretching for DDC transactions. As there are sources and sinks that do no perform this function correctly a system may not work correctly as DDC transactions are incorrectly transmitted/received. To overcome this a snoop configuration can be implemented where the SDA/SCL from the source is connected directly to the SDA/SCL sink. The SNx5DP159 will need its SDA_SNK and SCL_SNK pins connected to this link in order to the SNx5DP159 to configure the TMDS_CLOCK_RATIO_STATUS bit. Care must be taken when this configuration is being implemented as the voltage levels for DDC between the source and sink may be different, 3.3 V vs 5 V.

Thanks

David