Hi,
I am using IMXRT1176 microcontroller from NXP. I used ADV7280-M PAL/NTSC video decoder from Analog Devices a while ago. I struggled to get PAL video from that decoder IC for some time but not success. Later I opened several tickets to NXP forums to get an idea why I could not get video. To find the problem cause, I bought an evaluation board, IMXRT1166 from NXP, and OVP5640 digital camera sensor with it. I noticed that I can easily get video data with OVP5640 as RGB565/YUV422 output over MIPI bus but somehow not ADV7280-M.
After a while, I realized that IMXRT1176 MIPI-CSI2 Peripheral Bus does not support ITU-R.BT656 protocol. Since ADV7280-M is transmitting our active video data within CCIR656 protocol, NXP IMX1176 was not aware of that protocol over MIPI bus.
Because of the above reasons, I searched another PAL video decoder ICs. I found TW9992 from Renesas. At first glance, It meets our needs. However, as I mentioned above, because of the struggle for some time with ADV7280-m, I would like to be exact sure that TW9992 suits for us.
Does TW9992 give video data output the same format as OVP5640 camera does over MIPI bus? OVP5640 can give it directly as RGB565/YUV422 format over MIPI bus. I mean Can TW9992 give RGB565/YUV422 within ITU-R.BT656 protocol packet or not?
Many thanks,
Hello BHagi,
Let me check with our engineering team and get back to you.
Hello Bhagi,
Here is what the factory apps engineer who is responsible for this product said:
I think TW9992 works similar to ADV7280-M, if they can clarify what’s the exact difference between the OVP format and standard BT.656 format, we can suggest better.
Hello Cindy,
While questioning what else products I can use instead of ADV, I realized that I have to run IMXRT1176 CSI in gated clock mode. Because of that I could not see anything so far. Now I am able to get video from it, therefore no need to evaluate the other options. Many thanks for your interest. Have a nice day