Hello:
I'm a software engineer in Valeo. Now I want to output a video stream through MAX9295A to MAX9296A.
The resolution is 1704 * 1080. Stream type is YUV422(YUYV). Fps is 30.
On ECU, the TDA2P chip is connected to MAX9295A through a parallel link that uses 8 signal lines. MAX9295A is connected to MAX9296A through a coax link.
I configured the time parameters as follow:
HFP = 9, HBP = 9, HSW = 153
VFP = 4, VBP = 4, VSW = 32
FPS = 30
PCLK = 126000000
according to the formula:
PCLK = (HFP + HBP + HSW + 1704 ) * 2 * (VFP + VBP + VSW + 1080) * 30
Then I get a green screen on the MAX9296A side which connected to a Dothinkey box. It seems like a green cloth covering on the screen. No video stream behind the green cloth.
But if I configure the time parameters that do not conform to the formula, the Dothinkey box displays well. The parameters are as follow:
HFP = 2, HBP = 2, HSW = 116
VFP = 1, VBP = 1, VSW = 28
FPS = 30
PCLK = 126000000
My question is : Why it doesn't work well when conforming to the formula? Is the frequency of PCLK not supported?
Thank you very much!
