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ADV7441A Output black screen

Question asked by Justin_Xiao on Apr 25, 2018
Latest reply on May 6, 2018 by Justin_Xiao

Our products use adv7441a as a VGA input chip, resently a device's adv7441a output black screen Occasionally.

I compared the difference between this chip's registers and normal chip registers, the value of the 0x12[7] of the user map is 0.

This bit should be 1 to show the PLL is locked. Can anyone explain why and how to solve this problem? Thanks a lot!

 

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