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ADV7180 & ADV7391 SFL problem

Question asked by yimiqiba on Jun 22, 2014
Latest reply on Jun 27, 2014 by tok

Hello, adi,

      We used ADV7180 capture CVBS video signal through the FPGA to ADV7391 output to monitor, which the video screen have  flicker problem.This problem is very urgent, please to help to solve as soon as possible.Thank you!

 

      The test environment is such: DVD output CVBS video signal to the ADV7180 capture and then output to the FPGA, in the FPGA did not do anything with control signals and video data signals output and directly output to ADV7391 (including 7180 output of 27M clock signal, SFL signals, 8 bit data signals), when at the same time enable SFL in 7180 and 7391, 7391 of the output video images are flashing; Disable SFL in ADV7180 or ADV7391, the output of the ADV7391 video images do not flash, is normal; When set 7180 work in the free run mode and

output blue screen , and enable SFL in 7180 and 7391, 7391 of the output video picture is normal, no flicker.

      Additional, Video output from DVD direct connect to the monitor and the picture is not flashing, so we can determine the video source is normal.In addition, the peripheral circuit of 7180 and 7391 are reference to the  device manual.

 

ADV7180 register configuration:

Address

Value

 

00

04

 

04

D7

 

17

41

 

31

02

 

3D

A2

 

3E

6A

 

3F

A0

 

0E

80

 

55

81

 

0E

00

 

ADV7391 register configuration:

Address

Value

 

17

02

 

00

1C

 

01

00

 

80

10

 

82

CB

 

84

06

 

90

74


9c

00


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