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ADV7184 video format detection

Question asked by MikeF on Sep 3, 2010
Latest reply on Jul 20, 2012 by zhiyongzhang



I am feeding composite PAL into my ADV7184 but it autodetects it as SECAM. If I disable autodetection and tell it it's PAL, it works fine. It also works if I disable SECAM detection by clearing the AD_SECAM_EN.SECAM bit at address 0x07.


My circuit closely follows the example circuit in the datasheet. I use a 28.63636 MHz crystal and set the EN28XTAL bit in the register at address 0x1D.


Can anyone help or make suggestions?