DS90UB928Q-Q1: DS90UB928 do not have image out

Lei wang

Hi Sir:
We used DS90UB927+DS90UB928 , DS90UB928 connect two I2C device and touch panel; When we keep operating the panel .It will get data from I2C continuous.About 10m later.The 928 will have no image out.But we can use the touch panel. Then we reset.It is OK.

We find that ,There is no difference of reg and Pin states When 928 is OK and No image

over 8 years ago

0 Steven(Shenzhen) Shi over 8 years ago

TI__Mastermind 30515 points

Hi Lei,
what is the failure rate? That 928 has no image output means UB928 has NOthing output? Please check UB928's d/s, is it AV Mute?
also, how many boards have this issue?

best regards,
Steven

0 Lei wang over 8 years ago in reply to Steven(Shenzhen) Shi

Expert 1620 points

what is the failure rate? 100%
That 928 has no image output means UB928 has NOthing output? ---clock have out，One data have data, Through waveform judgment
Please check UB928's d/s, is it AV Mute? －－－try,but invalid
also, how many boards have this issue?－－－All

0 Steven(Shenzhen) Shi over 8 years ago in reply to Lei wang

TI__Mastermind 30515 points

Please check whether it is your system issue.

btw, you can try the pattern generation test in both UB928 and the paired side, thanks.

best regards,

Steven

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DS90UB928Q-Q1: DS90UB928 do not have image out