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Functional Description
55
SLES140A—March 2007 TVP5147M1PFP
2.11.50 Back-End AGC Control Register
Subaddress 6Ch
Default 08h
7 6 5 4 3 2 1 0
Reserved 1 Peak Color Sync
This register disables the back-end AGC when the front-end AGC uses specific amplitude references
(sync-height, color burst, or composite peak) to decrement the front-end gain. For example, writing 0x09 to
this register disables the back-end AGC whenever the front-end AGC uses the sync-height to decrement the
front-end gain.
Peak: Disables back-end AGC when the front-end AGC uses the composite peak as an amplitude reference.
0 = Disabled (default)
1 = Enabled
Color: Disables back-end AGC when the front-end AGC uses color burst as an amplitude reference.
0 = Disabled (default)
1 = Enabled
Sync: Disables back-end AGC when the front-end AGC uses the sync height as an amplitude reference.
0 = Disabled (default)
1 = Enabled
2.11.51 AGC Decrement Speed Control Register
Subaddress 6Fh
Default 04h
7 6 5 4 3 2 1 0
Reserved AGC decrement speed [2:0]
AGC decrement speed: Adjusts gain decrement speed. Only used for composite/luma peaks.
111 = 7 (slowest)
110 = 6 (default)
L
000 = 0 (fastest)
2.11.52 ROM Version Register
Subaddress 70h
Read only
7 6 5 4 3 2 1 0
ROM version [7:0]
ROM Version [7:0]: ROM revision number