DS90UB949A-Q1: [CIS010] I2C no-ACK - Pega

Rookie Tu

Part Number: DS90UB949A-Q1

Dear teams,

Always thanks for your help. Customers meet a problem that their 949 design is no AC[K on I2C, but other 947 and 941 design I2C worked well. Could you guide me how to verify this issue first?

TI949_CIS010.pdf

Best Regards,

Rookie

over 2 years ago

0 Shu Huang over 2 years ago

TI__Mastermind 18046 points

Hi Rookie,

I will take a look over the material and get back to you by the end of the week.

Best,

Shu

+1 Shu Huang over 2 years ago in reply to Shu Huang

TI__Mastermind 18046 points

Hi Rookie,

Would you be able to provide more details on the issue here? Is this no ACK on I2C between the MCU and 949 on the FPD I2C bus (not HDMI DDC signals?)? Any registers dumps you can share as well as initialization sequence that differ from 947/941?

Best,

Shu

0 Rookie Tu over 2 years ago in reply to Shu Huang

TI__Expert 4125 points

Thanks Shu,

We resolve the issue.

Best Regards,

Rookie

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DS90UB949A-Q1: [CIS010] I2C no-ACK - Pega