Cp Data Path For Hdmi Modes - Analog Devices ADV7610 Hardware User's Manual

UG-438
CHANNEL A
CHANNEL B
CHANNEL C
SWAP_SPLIT_AV, Addr 44 (CP), Address 0xC9[2]
A control to swap the luma and chroma AV codes in DDR modes.
Function
SWAP_SPLIT_AV Description
0 Swap the luma and chroma AV codes in DDR mode.
1 (default) Do not swap the luma and chroma AV codes in DDR mode.

CP DATA PATH FOR HDMI MODES

Figure 38 and Figure 39 depict the data path of the video for HDMI mode. These figures depict the gains and offsets applied when using
the automatic control, OP_656_RANGE, and the manual options for setting the clamp level, gain, and offset.
The I 2 C settings are detailed in Table 45 for use when processing extended range video signals with blacker than black and/or whiter than
white video levels.
Table 45. Settings Required to Support Extended Range Video Input
I 2 C Setting/Mode Analog Modes
OP_656_RANGE 1
ALT_DATA_SAT 1
Pregain Block
To compensate for signal attenuation in the analog front end of the
path. The pregain block is controlled by CP_MODE_GAIN_ADJ[7:0], which represents an unsigned value in a 1.7 binary format. The
range of CP_MODE_GAIN_ADJ[7:0]
The MSB of CP_MODE_GAIN_ADJ[7:0]
of the pregain value.
CP_MODE_GAIN_ADJ[7:0], Addr 44 (CP), Address 0x40[7:0]
Pregain adjustment to compensate for the gain of the analog front end. This register stores a value in a 1.7 binary format.
Function
CP_MODE_GAIN_ADJ[7:0]
0xxxxxxx
10000000
1xxxxxxx
CP_MODE_GAIN_ADJ_EN, Addr 44 (CP), Address 0x3E[2]
A control to enable pregain.
Function
CP_MODE_GAIN_ADJ_EN
0 (default)
1
REPL_AV_CODE = 0
3FF 000 000
3FF 000 000
3FF 000 000
AV CODE SECTION
Figure 37. AV Code Output Options (CP)
HDMI Mode YUV
1
1
is 0 to 1.99.
represents the integer part of the pregain value while the 7 LSBs represents the fractional part
Description
Gain of (0 + (xxxxxxx/128))
Default pregain (pregain of 1.0)
Gain of (1 + (xxxxxxx/128))
Description
The pregain block is bypassed.
The pregain block is enabled.
Rev. 0 | Page 112 of 184
AV Y
AV Pb
AV Pr
HDMI Mode RGB [0 to 255]
0
0
ADV7610 and input buffer gain, a pregain block is provided in the CP
Hardware User Guide
REPL_AV_CODE = 1
000 AV Y
3FF 000 Pb
3FF 000 Pr
AV CODE SECTION
HDMI Mode RGB [16 to 235]
1
1