I have question on “lock indicator” in TVP5150 chip.
In the manual for TVP5150, document SLES043A,
On the top of page 27, there is a lock status (HVLK) register bit.
On page 36, sec. 3.22.16, register “Configuration Shared Pins”, there are also three lock indicator configuration:
What indeed are these “lock”s? What is their function? Are they related to VSYNC and HSYNC?
And for example on page 36 in the description for LOCK23
0 = FID (default, if bit 3 is selected to output FID)
1 = Lock indicator (Indicates whether device is locked both horizontally and vertically)
What does this mean? Why does the device (5150?) needs to be locked, and how it is locked?
Sincerely looking forward to answers,
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