In the pin description of the MAX9217 serializer datasheet, it says that DE_IN must be switching for proper operation. What does this mean, and what sort of input needs to be connected to this pin?

Question

In the pin description of the MAX9217 serializer datasheet, it says that DE_IN must be switching for proper operation.  What does this mean, and what sort of input needs to be connected to this pin?

Accepted Answer

Most camera modules have a DE output of some kind to indicate when camera data is available. If your camera does not have that output, oftentimes, the HSYNC output is what you connect to DE_IN. HSYNC signals the beginning of a video data stream.

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In the pin description of the MAX9217 serializer datasheet, it says that DE_IN must be switching for proper operation. What does this mean, and what sort of input needs to be connected to this pin?