AD9880SLASHPCB datasheet(48/64 Pages) AD

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AD9880

Rev. 0 | Page 48 of 64

Table 71. DVI Hsync Polarity Detect

Detect

Result

DVI Hsync polarity is low active

DVI Hsync polarity is high active

0x30

DVI Vsync Polarity

This read-only bit indicates the polarity of the DVI

Vsync.

Table 72. DVI Vsync Polarity Detect

Detect

Result

DVI Vsync polarity is low active

DVI Vsync polarity is high active

0x30

3-0

HDMI Pixel Repetition

These read-only bits indicate the pixel repetition on

DVI. 0 = 1×, 1 = 2×, 2 = 3×, up to a maximum

repetition of 10× (0x9).

Table 73.

Select

Repetition Multiplier

0000

1×

0001

2×

0010

3×

0011

4×

0100

5×

0101

6×

0110

7×

0111

8×

1000

9×

1001

10×

MACROVISION

0x31

7-4

Macrovision Pulse Max

These bits set the pseudo sync pulse width maximum

for Macrovision detection in pixel clocks. This is

functional for 13.5 MHz SDTV or 27 MHz progressive

scan. Power up default is 9.

0x31

3-0

Macrovision Pulse Min

These bits set the pseudo sync pulse width maximum

for Macrovision detection in pixel clocks. This is

functional for 13.5 MHz SDTV or 27 MHz progressive

scan. Power up default is 6.

0x32

Macrovision Oversample Enable

Tells the Macrovision detection engine whether we are

oversampling or not. This accommodates 27 MHz

sampling for SDTV and 54 MHz sampling for

progressive scan and is used as a correction factor for

clock counts. Power up default is 0.

0x32

Macrovision PAL Enable

Tells the Macrovision detection engine to enter PAL

mode when set to 1. Default is 0 for NTSC mode.

0x32

5-0

Macrovision Line Count Start

Sets the start line for Macrovision detection. Along

with Register 0x33, Bits [5:0] they define the region

where MV pulses are expected to occur. The power-up

default is Line 13.

0x33

Macrovision Detect Mode

0 = standard definition

1 = progressive scan mode

0x33

Macrovision Settings Override

This defines whether preset values are used for the

MV line counts and pulse widths or the values stored

in I2C registers.

0 = use hard coded settings for line counts and pulse

widths

1 = use I2C values for these settings

0x33

5-0

Macrovision Line Count End

Sets the end line for Macrovision detection. Along

with Register 0x32, Bits [5:0] they define the region

where MV pulses are expected to occur. The power up

default is Line 21.

0x34

7-6

Macrovision Pulse Limit Select

Sets the number of pulses required in the last three

lines (SD mode only). If there is not at least this

number of MV pulses, the engine stops. These two

bits define the following pulse counts:

00 = 6

01 = 4

10 = 5 (default)

11 = 7

0x34

Low Frequency Mode

Sets whether the audio PLL is in low frequency mode

or not. Low frequency mode should only be set for

pixel clocks < 80 MHz.

0x34

Low Frequency Override

Allows the previous bit to be used to set low frequency

mode rather than the internal autodetect.

0x34

Up Conversion Mode

0 = repeat Cb/Cr values

1 = interpolate Cb/Cr values

0x34

CbCr Filter Enable

Enables the FIR filter for 4:2:2 CbCr output.

AD9880/PCB Datasheet(PDF) 48 Page - Analog Devices

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