AD9880SLASHPCB datasheet(49/64 Pages) AD

49 / 64 page

AD9880

Rev. 0 | Page 49 of 64

COLOR SPACE CONVERSION

The default power up values for the color space con-

verter coefficients (R0x35 through R0x4C) are set for

ATSC RGB to YCbCr conversion. They are completely

programmable for other conversions.

0x34

Color space Converter Enable

This bit enables the color space converter. The power-

up default setting is 0.

Table 74. Color space Converter

Select

Result

Disable color space converter

Enable color space converter

0x35

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 75. CSC Fixed Point Converter Mode

Select

Result

±1.0, −4096 to 4095

±2.0, −8192 to 8190

1×

±4.0, −16384 to 16380

0x35

4-0

ColorspaceConversionCoefficientA1MSBs

These 5 bits form the 5 MSBs of the Color space

Conversion Coefficient A1. This combined with the

8 LSBs of the following register form a 13-bit twos

complement coefficient which is 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

7-0

ColorspaceConversionCoefficientA1LSBs

See the Register 0x35 section.

0x37

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 register they form a 13 bit twos

complement coefficient that is 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

7-0

CSC A2 LSBs

See the Register 0x37 section.

0x39

4-0

CSC A3 MSBs

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

0x3A

7-0

CSC A3 LSBs

0x3B

4-0

CSC A4 MSBs

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

0x3C

7-0

CSC A4 LSBs

0x3D

4-0

CSC B1 MSBs

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

0x3E

7-0

CSC B1 LSBs

0x3F

4-0

CSC B2 MSB

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

0x40

7-0

CSC B2 LSBs

0x41

4-0

CSC B3 MSBs

The default value for the 13-bit B3 is 0x1E89.

0x42

7-0

CSC B3 LSBs

0x43

4-0

CSC B4 MSBs

The default value for the 13-bit B4 is 0x0291.

0x44

7-0

CSC B4 LSBs

0x45

4-0

CSC C1 MSBs

The default value for the 13-bit C1 is 0x0000.

0x46

7-0

CSC C1 LSBs

0x47

4-0

CSC C2 MSBs

The default value for the 13 bit C2 is 0x0800.

0x48

7-0

CSC C2 LSBs

0x49

4-0

CSC C3 MSBs

The default value for the 13-bit C3 is 0x0E87.

0x4A

7-0

CSC C3 LSBs

0x4B

4-0

CSC C4 MSBs

The default value for the 13-bit C4 is 0x18BD.

0x4C

7-0

CSC C4 LSBs

0x57

A/V Mute Override

0x57

A/V Mute Value

0x57

Disable AV Mute

0x57

Disable Audio Mute

0x58

MCLK PLL Enable

This bit enables the use of the analog PLL.

0x58

6-4

MCLK PLL_N

These bits control the division of the MCLK out of the

PLL.

AD9880/PCB Datasheet(PDF) 49 Page - Analog Devices

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