Dear,
I used the DS90UB960 like below block diagram.
And, It works, also it's the mipi signal in this state. ( Picture1 )
[Picture1]
But, When I do the ESD test ( Electro Static Discharge ), this MIPI signal was broken like below picture2.
[Picture2]
Aslo, the picture3 is an enlargement of picture2
[Picture3]
I think that this MIPI signal was broken by ESD (Electro Static Discharge)
Please, advice for this ESD test ?
best regards,
hosung shin.
Hi Thomas,
Our test conditions of ESD is..
[1] Test conditions of ESD
contact or air discharge >> contact
what voltage level >> 8k voltage ( 8000 Volt )
contact point >> all of case.
[2] Have we read back andy diagnostic register ...
>> When the mipi signal was broken, it's very short time like below picture
the RED box is broken signal.
then, I can't read this register on this time.
best regards,
hosung shin.
Hi Hosung,
Thanks for following up on this. Could you confirm if the FPD-Link should be locked during this testing? Register 0x4D should show if we're losing lock during this ESD event, and if the SER/DES are locked before/after the event, however it reads 0x00 in both of the register dups which you have shown above.
One thing to keep in mind, these registers are port specific (RX port registers selected in register 0x4C), it could be helpful to look at the lock status of each RX port. The concern would be that if we are losing lock, it is possible that there is a gap in the MIPI data which is being sent over the link.
Best,
Thomas
