DS90UB960-Q1: DS90UB960 +DS90ub935 EMI issure

xuhui wang

Prodigy 110 points

Part Number: DS90UB960-Q1

Dear Team,

We an EMI issue on DS90UB960+DS90UB935. This affect our GPS function.

Right now our sensor is 640*480/30fps,CSI-2 syncronous mode, FPD3_PCLK = 4 x REFCLK=4*25Mhz.

Any way can help us? Thanks.

Xuhui,Wang

over 6 years ago

0 Casey McCrea over 6 years ago

TI__Guru** 103215 points

Hello Xuhui,

Since you are using a very low low resolution/data rate for the image sensor data you should be able to reduce the 935 forward channel link rate to 2G mode and shift the affected energy bands accordingly without affecting your end to end data transfer in any way. Please try setting the 960 back channel speed to 25Mbps instead of 50Mbps which will reduce the forward channel speed by 1/2:

0x4C = 0x0F // Select all RX ports

0x57[2:0] = 101

Best Regards,

Casey

0 xuhui wang over 6 years ago in reply to Casey McCrea

Prodigy 110 points

Hi Casey,

I checked the spec of 960, Address 0x57 is BIST_ERR_COUNT Register. It is type R. Is there some mistake？

Xuhui Wang

0 Casey McCrea over 6 years ago in reply to xuhui wang

TI__Guru** 103215 points

Hello Xuhui,

No this is not a typo. BIST_ERR_COUNT is the number of errors recorded during the BIST test.

Best Regards,

Casey

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DS90UB960-Q1: DS90UB960 +DS90ub935 EMI issure