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NTSC signal input in iMX6DP

Question asked by Takashi Takahashi on Jul 21, 2016
Latest reply on Aug 4, 2016 by Wigros Sun

Dear community.

 

Our customer has question about NTSC signal input in iMX6DP.

 

It has confirmed the NTSC signal input (BT656 interlaced) in iMX6DP.

 

When it should be 30 frames per second input at the input from IPU1 of CSI0, but only 15 frames are input phenomenon has occurred.

 

I tried various, the value of the CSI0_VSYNC_POL of IPU_CSI0_SENS_CONF register

set to 1 (IPP_IND_SENSB_VSYNC is inverted before applied to internal circuitry)

If, it is 30 frame input,

but set to 0 (IPP_IND_SENSB_VSYNC is not inverted before applied to internal circuitry)

In the case of  only 15 frames .

My understanding that for BT656 input is unrelated to CSI0_VSYNC_POL settings.

 

Also, in case of iMX6SoloDual have been entered in CSI1 from 30 frame even if set to "0".

I should be set to 1 ? Is it correct?

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