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About ADV7441 FSC LOCK bit

Question asked by WilliamLian Employee on Nov 16, 2016
Latest reply on Nov 16, 2016 by GuenterL

there's a question from custoner about ADV7441 CVBS mode, when input with NTSM foramt CVBS,  the user map 0x10 (status 1) register value is 0x0d, it's showed teh normal N format. Some cameras which wiht NTSM foramt CVBS connected with ADV7441, initiallly work well, then plug out the camera, the 0x10 ( user map status 1 ) value is 0x6a, and ADV7441 output blank PAL format; meanwhile, some other cameras which wiht NTSM foramt CVBS connected with ADV7441, initiallly work well, then plug out the camera, the 0x10 ( user map status 1 ) value is 0x6a, and ADV7441 output blank N  format;  study the registers, the only difference of above 2 occasions is FSC LOCK bit, customer want to know what reason impacts the FSC LOCK bit status.

 

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