DS90UB949A-Q1: Pin Mapping and I2C/SPI Usage Clarification

Abhishek Sonar

Part Number: DS90UB949A-Q1

Tool/software:

Hello,

I'm planning to map the pins of the DS90UB949A-Q1 with the SoC signals and wanted some clarifications:

1️⃣ The DS90UB949A-Q1 has two I2C interfaces:

DDC I2C
Standard I2C
What are their specific use cases, and do both need to be connected?

2️⃣ SPI Pins & High-Speed Bidirectional Pins

Can I leave these pins unconnected if not required, or are they essential for specific functionalities?

Additionally, if you have a hardware application note or design guide, that would be really helpful.

Regards,
Abhishek

0 Fadi Abdulhameed over 1 year ago

Hello Abhishek

Abhishek Sonar said:
DDC I2C

DDC I2C bus is reserved for HDMI PHY activity such as EDID, etc.

Abhishek Sonar said:
Standard I2C

949 I2C is used to program Local 949 registers and remote deserializer registers through FPD-Link channel.

Abhishek Sonar said:
SPI Pins & High-Speed Bidirectional Pins

If you're not planning to use SPI communication you don't need to connect them.

Abhishek Sonar said:
Additionally, if you have a hardware application note or design guide, that would be really helpful.

You can follow 949 EVM user-guide it has schematic, etc.

Regards,
Fadi A.

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