IMX6 QUAD- Should NVCC_EIMx & NVCC_LCD be same voltage?

[emilzachariageo]

Hi Team,

In our new Dual camera project, we're interfacing 2 cameras with YCbCr-16 parallel interface to CSI1 and CSI2 ports of IMX6 Quad processor.

We're using 3.3VIO voltage for both of these camera signals.

So, NVCC_CSI, NVCC_EIM0, NVCC_EIM1, NVCC_EIM2 are all connected to 3.3V.

The OLED we wanted to connect had RGB-24 interface with 1.8VIO voltage.

So, we thought of connecting NVCC_LCD to 1.8V and use DISP0_DATA00 to DISP0_DATA23 signals and associated lock and sync signals which come under NVCC_LCD power group.

But when I set NVCC_LCD as 1.8V in Pins tool which I use for pin planning, a warning was shown mentioning "Power Group conflict".

Please explain to us why this warning.

Please confirm if we can use display signals at1.8VIO setting NVCC_LCD= 1.8V.

Thanks in advance.

Emil

[igorpadykov]

Hi Emil

NVCC_CSI, NVCC_EIM0, NVCC_EIM1, NVCC_EIM2 can be powered by different
power supplies, warning "Power Group conflict" appears since signal names may
be misleading and power is defined by used pad. It is necessary to use
i.MX6DQ Datasheet Table 96. 21 x 21 mm Functional Contact Assignments "Power
Group" column.

https://www.nxp.com/docs/en/data-sheet/IMX6DQCEC.pdf 

Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

[emilzachariageo]

Hi Igor,

So, can we connect cameras in 3.3VIO and display signals in 1.8V IO just by using required voltage at the respective pins' power group supply pins?

[igorpadykov]

Hi Emil

yes correct.

Best regards
igor

[emilzachariageo]

Thanks Igor.