Analog Devices ADV8005, Справочник по аппаратуре

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UG-707 ADV8005 Hardware Reference Manual
7.4.5.1. Programming the FSC
The subcarrier frequency register value is divided into four FSC registers, as shown in Equation 28 . The subcarrier frequency registers ( fsc[31:0] )
must be updated sequentially, starting with Subcarrier Frequency Register 0 and ending with Subcarrier Frequency Register 3. The reason for
this is because the subcarrier frequency only updates when Subcarrier Frequency Register 3 has been updated. The SD input standard
autodetection feature (sd_autodetect_en) must be disabled. The registers to be programmed are described below.
fsc[31:0] , Encoder Map, Address 0xE48F[7:0]; Address 0xE48E[7:0]; Address 0xE48D[7:0]; Address 0xE48C[7:0]
This register is used to set the subcarrier frequency value.
Table 72 outlines the values that should be written to the subcarrier frequency registers for NTSC and PAL B/D/G/H/I.
Table 72: Typical F
SC
Values
Register Description NTSC PAL B/D/G/H/I
0xE48C F
SC
0 0x1F 0xCB
0xE48D F
SC
1 0x7C 0x8A
0xE48E F
SC
2 0xF0 0x09
0xE48F F
SC
3 0x21 0x2A
7.4.6. SD Non Interlaced Mode (240p/288p)
The ADV8005 encoder core supports an SD non interlaced mode. Using this mode, progressive inputs at twice the frame rate of NTSC and PAL
(240p/59.94 Hz and 288p/50 Hz respectively) can be input into the ADV8005 encoder. If the user selects the input to be 240p or 288p,
sd_non_interlaced must be set correspondingly. Refer to Section 7.2 for more details on setting the input format.
sd_non_interlaced , Encoder Map, Address 0xE488[1]
This bit is used to enable the support of SD non-interlaced modes.
Function
sd_non_interlaced Description
1 Enabled
0 (default) Disabled
Note: All input configurations, output configurations, and features available in NTSC and PAL modes are available in SD non interlaced mode.
For 240p/59.94 Hz input, the ADV8005 encoder core should be configured for NTSC operation. For 288p/50 Hz input, the ADV8005 encoder
core should be configured for PAL operation.
7.4.7.
Filters
The ADV8005 encoder core offers numerous filtering options for both SD and ED/HD as well as for both luma and chroma data.
7.4.7.1. SD Filters
Table 73 provides details on the numerous available SD filters.
Table 73: Internal Filter Specifications
Filter Pass-Band Ripple (dB) 1 3 dB Bandwidth (MHz) 2
Luma LPF NTSC 0.16 4.24
Luma LPF PAL 0.1 4.81
Luma Notch NTSC 0.09 2.3/4.9/6.6
Luma Notch PAL 0.1 3.1/5.6/6.4
Luma SSAF 0.04 6.45
Luma CIF 0.127 3.02
Luma QCIF Monotonic 1.5
Chroma 0.65 MHz Monotonic 0.65
Chroma 1.0 MHz Monotonic 1
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