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ADV7182: No signal on LLC pin

I have configured ADV7128 register via IIC and got the correct ack signal. The ADV7182 is set in free-fun mode, and output Boundary box. Register bit TRI_LLC is set to 0 (LLC pin active).

The crystal also works properly. However, there is no signal on LLC pin. Can anyone here tell me what may cause this problem.

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