EVAL-ADV7183BEB View Datasheet(PDF) - Analog Devices
Part Name
Description
MFG CO.
'EVAL-ADV7183BEB' PDF : 104 Pages View PDF
VS and FIELD Configuration
The following controls allow the user to configure the behavior
of the VS and FIELD output pins, as well as the generation of
embedded AV codes:
• ADV encoder-compatible signals via NEWAVMODE
• PVS, PF
• HVSTIM
• VSBHO, VSBHE
• VSEHO, VSEHE
• For NTSC control:
o NVBEGDELO, NVBEGDELE, NVBEGSIGN,
NVBEG[4:0]
o NVENDDELO, NVENDDELE, NVENDSIGN,
NVEND[4:0]
o NFTOGDELO, NFTOGDELE, NFTOGSIGN,
NFTOG[4:0]
• For PAL control:
o PVBEGDELO, PVBEGDELE, PVBEGSIGN,
PVBEG[4:0]
o PVENDDELO, PVENDDELE, PVENDSIGN,
PVEND[4:0]
o PFTOGDELO, PFTOGDELE, PFTOGSIGN,
PFTOG[4:0]
NEWAVMODE New AV Mode, Address 0x31 [4]
Table 101. NEWAVMODE Function
NEWAVMODE Description
0
EAV/SAV codes generated to suit ADI
encoders. No adjustments possible.
1 (default)
Enable Manual Position of VSync, Field, and AV
codes using 0x34 to 0x37 and 0xE5 to 0xEA.
Default register settings are CCIR656
compliant; see Figure 21 for NTSC and
Figure 26 for PAL. For recommended manual
user settings, see Table 109 and Figure 22 for
NTSC; see Table 122 and Figure 27 for PAL.
ADV7183A
HVSTIM Horizontal VS Timing, Address 0x31 [3]
The HVSTIM bit allows the user to select where the VS signal is
being asserted within a line of video. Some interface circuitry
may require VS to go low while HS is low.
Table 102. HVSTIM Function
HVSTIM
Description
0 (default) Start of line relative to HSE.
1
Start of line relative to HSB.
VSBHO VS Begin Horizontal Position Odd, Address 0x32 [7]
The VSBHO and VSBHE bits select the position within a line at
which the VS pin (not the bit in the AV code) goes active. Some
follow-on chips require the VS pin to only change state when
HS is high/low.
Table 103. VSBHO Function
VSBHO
Description
0 (default)
VS pin goes high at the middle of a line of video
(odd field).
1
VS pin changes state at the start of a line (odd
field).
VSBHE VS Begin Horizontal Position Even, Address 0x32 [6]
The VSBHO and VSBHE bits select the position within a line at
which the VS pin (not the bit in the AV code) goes active. Some
follow-on chips require the VS pin to only change state when
HS is high/low.
Table 104. VSBHE Function
VSBHE
Description
0
VS pin goes high at the middle of a line of video
(even field).
1 (default)
VS pin changes state at the start of a line (even
field).
VSEHO VS End Horizontal Position Odd, Address 0x33 [7]
The VSEHO and VSEHE bits select the position within a line at
which the VS pin (not the bit in the AV code) goes active. Some
follow-on chips require the VS pin to only change state when
HS is high/low.
Table 105. VSEHO Function
VSEHO
Description
0
VS pin goes low (inactive) at the middle of a line
of video (odd field).
1 (default)
VS pin changes state at the start of a line (odd
field).
Rev. B | Page 43 of 104
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