AD9381SLASHPCB datasheet(30/44 Pages) AD

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AD9381

Rev. 0 | Page 30 of 44

0x33—Bit[7] Macrovision Detect Mode

0 = standard definition. 1 = progressive scan mode.

0x33—Bit[6] 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—Bits[5:0] Macrovision Line Count End

Set the end line for Macrovision detection. Along with

pulses are expected to occur. The power-up default is Line 21.

0x34—Bits[7:6] Macrovision Pulse Limit Select

Set 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 2 bits define these pulse counts:

00 = 6

01 = 4

10 = 5 (default)

11 = 7

0x34—Bit[5] Low Frequency Mode

Sets the audio PLL to low frequency mode. Low frequency

mode should only be set for pixel clocks < 80 MHz.

0x34—Bit[4] Low Frequency Override

Allows the previous bit to be used to set low frequency mode

rather than the internal auto-detect.

0x34—Bit[3] Up Conversion Mode

0 = repeat Cb/Cr values. 1 = interpolate Cb/Cr values.

0x34—Bit[2] CbCr Filter Enable

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

COLOR SPACE CONVERSION

The default power-up values for the color space converter

coefficients (R0x35 through R0x4C) are set for ATSC RGB-to-

YCbCr conversion. They are completely programmable for

other conversions.

0x34—Bit[1] Color Space Converter Enable

This bit enables the color space converter. 0 = disable color

space converter. 1 = enable color space converter. The power-up

default setting is 0.

0x35—Bits[6:5] Color Space Converter Mode

These two bits set the fixed point position of the CSC

coefficients, including the A4, B4, and C4 offsets.

Table 17. CSC Fixed Point Converter Mode

Select

Result

±1.0, −4096 to +4095

±2.0, −8192 to +8190

1×

±4.0, −16384 to +16380

0x35—Bits[4:0] Color Space Conversion Coefficient A1

MSBs

These 5 bits form the 5 MSBs of the Color Space Conversion

Coefficient A1. This, combined with the 8 LSBs of the following

user programmable. The equation takes the form of:

ROUT = (A1 × RIN) + (A2 × GIN) + (A3 × BIN) + A4

GOUT = (B1 × RIN) + (B2 × GIN) + (B3 × BIN) + B4

BOUT = (C1 × RIN) + (C2 × GIN) + (C3 × BIN) + C4

The default value for the 13-bit, A1 coefficient is 0x0C52.

0x36—Bits[7:0] Color Space Conversion Coefficient A1

LSBs

See the Register 0x35 section.

0x37—Bits[4:0] CSC A2 MSBs

These five bits form the 5 MSBs of the Color Space Conversion

Coefficient A2. Combined with the 8 LSBs of the following

user programmable. The equation takes the form of:

ROUT = (A1 × RIN) + (A2 × GIN) + (A3 × BIN) + A4

GOUT = (B1 × RIN) + (B2 × GIN) + (B3 × BIN) + B4

BOUT = (C1 × RIN) + (C2 × GIN) + (C3 × BIN) + C4

The default value for the 13-bit, A2 coefficient is 0x0800.

0x38—Bits[7:0] CSC A2 LSBs

See the Register 0x37 section.

0x39—Bits[4:0] CSC A3 MSBs

The default value for the 13-bit A3 is 0x0000.

0x3A—Bits[7:0] CSC A3 LSBs

0x3B—Bits[4:0] CSC A4 MSBs

The default value for the 13-bit A4 is 0x19D7.

0x3C—Bits[7:0] CSC A4 LSBs

0x3D—Bits[4:0] CSC B1 MSBs

The default value for the 13-bit B1 is 0x1C54.

0x3E—Bits[7:0] CSC B1 LSBs

0x3F—Bits[4:0] CSC B2 MSB

The default value for the 13-bit B2 is 0x0800.

AD9381/PCB Datasheet(PDF) 30 Page - Analog Devices

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