Datasheet

TVP5158, TVP5157, TVP5156
SLES243G –JULY 2009–REVISED APRIL 2013 www.ti.com
Table 4-29. Luma ALC Freeze Upper Threshold
Subaddress 26h
Default 00h
7 6 5 4 3 2 1 0
Luma ALC freeze [7:0]
Upper hysteresis threshold for luma ALC freeze function. The lower hysteresis threshold for the ALC freeze function is fixed at 1 count out
of 4096. Setting the upper threshold to 00h (default condition) disables the ALC freeze function.
Table 4-30. Chroma ALC Freeze Upper Threshold
Subaddress 27h
Default 00h
7 6 5 4 3 2 1 0
Chroma ALC freeze [7:0]
Upper hysteresis threshold for chroma ALC freeze function. The lower hysteresis threshold for the ALC freeze function is fixed at 1 count
out of 4096. Setting the upper threshold to 00h (default condition) disables the ALC freeze function. Recommend a setting of 02h or greater
when enabled.
Table 4-31. AGC Increment Speed
Subaddress 29h
Default 06h
7 6 5 4 3 2 1 0
Reserved AGC increment speed [3:0]
AGC increment speed
Controls the filter coefficient of the first-order, recursive automatic gain control (AGC) algorithm whenever incrementing the gain.
000 0 (fastest)
110 6 (default)
111 7 (slowest)
Table 4-32. AGC Increment Delay
Subaddress 2Ah
Default 1Eh
7 6 5 4 3 2 1 0
AGC increment delay [7:0]
AGC increment delay [7:0]
Number of frames to delay gain increments. Also see AGC decrement delay at subaddress 2Ch.
00000000 0
00011110 30 frames (default)
11111111 255 frames
56 Internal Control Registers Copyright © 2009–2013, Texas Instruments Incorporated
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