DPHY440SSRHREVM: My MIPI input signal voltage is being amplified

Varun Pandithurai

Part Number: DPHY440SSRHREVM

I tried interfacing my camera with DPHY440SSRHREVM, the input signal is 1.8V and the output signal i get is around 2.2 volts.

But I need MIPI signal in 1.8V only.

Is there anyway to configure it for 1.8V ?

0 David (ASIC) Liu over 2 years ago

Hi,

How are you connected to the DPHY440 EVM?

Is the 1.8V differential voltage? If it is, the 1.8V differential voltage is outside the DPHY440 Absolute Maximum Rating and can't be supported.

Thanks

David

0 Varun Pandithurai over 2 years ago

Sorry it was a typo mistake.

the input signal is 1.2V.

Is there any mipi configuration required for this EVM?

0 David (ASIC) Liu over 2 years ago in reply to Varun Pandithurai

Hi,

The DPHY440 LP output max is 1.3V, so you shouldn't see 2.2V on the output.

You also need to make sure the source follows the MIPI spec. The DPHY440 retimer intends to boost the signal in HS mode only.

Thanks

David

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