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I'm having trouble seeing where the Billboard device functionality is implemented on the CY4541 Evaluation Kit.
CY4541 appears to support Alternate Mode in both direction: Type-C to DP and DP to Type-C.
The above demos allow functional verification of a working interface.
Is there a way to test the fallback function of Billboard when the initial Alternate mode is not accepted?
It appears the CY4531 kit has a Billboard controller embedded in the CCG3.
Reference designs for CCG1 and CCG2 have the external billboard controller CY7C65210
Reference:
- USB Billboard - CY7C65210 and CY7C65217 @ https://www.cypress.com/documentation/other-resources/usb-billboard-cy7c65210-and-cy7c65217
- Need for a USB Billboard Device in Type-C Solutions – KBA97146 @ Need for a USB Billboard Device in Type-C Solutions – KBA97146
Regards,
Greg
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Hi Greg,
1. Your understand is incorrect on CY4541 appears to support Alternate Mode in both direction: Type-C to DP and DP to Type-C. CY4541 support DisplayPort Source regards on hardware limitation.
2. The hardware limitation is PS8740B is fixed direction of Display-port streaming.
3. You are correct that CCG3 has a Billboard controller embedded, but CY4531 is not enabled it. Since CY4531 is assembled CYPD3125 and support I2C bootloading which is not enabled billboard in firmware by default.
4. If you need a single chip and integrate billboard, please kindly use CYPD3123 or CYPD3120.
Best Regards,
Lisa