Analog Devices ADV8005, Справочник по аппаратуре

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ADV8005 Hardware Reference Manual UG-707
vid_av_pos_sel , IO Map, Address 0x1B4B[3]
This bit is used to select if the HS generated is consistent with EIA 861 timing or dependant on the embedded timing codes.
Function
vid_av_pos_sel Description
0 (default) Generate HS coincident with EAV code
1 Generate HS/VS based on 861 timing
vid_av_split_code , IO Map, Address 0x1B4B[2]
This bit is used to control how AV codes are decoded - replicated on or split across all channels.
Function
vid_av_split_code Description
0 (default) Decodes AV codes which are replicated on all channels
1 Decodes AV codes which are split across all channels
vid_av_codes_rep_man_en , IO Map, Address 0x1B4B[1]
This bit is used to control the enable for AV source codes. AV_codes_rep_man is used instead of the auto based on the input video format.
Function
vid_av_codes_rep_man_en Description
0 (default) AV codes replicated based on internal flag
1 Use i2c bit
vid_av_codes_rep_man , IO Map, Address 0x1B4B[0]
This bit is used to specify if the AV_codes are replicated or not.
Codes replicated (4:4:4) = FF,FF,FF,00,00,00,00,00, 00,AV,AV,AV.
Codes not replicated = FF,00,00,AV.
Function
vid_av_codes_rep_man Description
1 AV codes are replicated.
0 (default) AV codes are not replicated.
The updither feature in the
ADV8005 can be used to randomize quantization errors, preventing large scale patterns such as color banding in
images. Refer to Section 2.2.3 for more information on the updither block .
The updither block on the video TTL input channel can be controlled via the
vid_ud_bypass_man_en and vid_ud_bypass_man bits. By default,
the manual bypass is disabled which means that the updither block cannot be bypassed. The updither block configuration is outlined in Section
2.2.3 . The updither settings are shared for all channels (primary, secondary and RX).
vid_ud_bypass_man_en , IO Map,
Address 0x1B4A[2]
This bit is used to enable the manual bypass for the up dither. Setting this bit enables the bypass to be used.
Function
vid_ud_bypass_man_en Description
0 (default) Manual bypass disable
1 Manual bypass enable
vid_ud_bypass_man , IO Map, Address 0x1B4A[1]
This bit is used to bypass the up dither block.
Function
vid_ud_bypass_man Description
0 (default) Disable bypass
1 Enable bypass
The primary input path features contrast, brightness and saturation controls. All contrast, brightness and saturation controls (
contrast[9:0] ,
brightness[7:0] , saturation[7:0] , blank_level_y[11:0] , blank_level_u[11:0] and blank_level_v[11:0] ) are doubled buffered on VSync.
The
contrast[9:0] value has a range of 0 to 1.992. Refer to Figure 31 for more information on how the contrast controls influence the video signal.
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