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4.3.4Y/CFIFOUnpacking
Y FIFO
Cb FIFO
Y 2 Y 4 Y 6Y 1 Y 3 Y 5 Y 7
VDOUT[9−2]
VCLKOUT
63 5655 4847 4039 32
Y 21 Y 20Y 23 Y 22
Y 29 Y 28Y 31 Y 30
Y 5 Y 4Y 7 Y 6
Y 13 Y 12Y 15 Y 14
Cb 5 Cb 4Cb 7 Cb 6
Cb 13 Cb 12Cb 15 Cb 14
Cr FIFO
Little-Endian Unpacking
Y 8 Y 10Y 9 Y 11
Cb 0 Cb 1 Cb 2 Cb 3Cr 0 Cr 1 Cr 2 Cr 3
VDOUT[19−12]
Cb 4 Cb 5Cr 4 Cr 5
Y 0
31 2423 1615 8 7 0
Y 17 Y 16Y 19 Y 18
Y 25 Y 24Y 27 Y 26
Y 1 Y 0Y 3 Y 2
Y 9 Y 8Y 11 Y 10
31 2423 1615 8 7 0
Cb 1 Cb 0Cb 3 Cb 2
Cb 9 Cb 8Cb 11 Cb 10
31 2423 1615 8 7 0
63 5655 4847 4039 32
63 5655 4847 4039 32
Cr 5 Cr 4Cr 7 Cr 6
Cr 13 Cr 12Cr 15 Cr 14
Cr 1 Cr 0Cr 3 Cr 2
Cr 9 Cr 8Cr 11 Cr 10
4.4VideoOutputFiltering
4.4.1OutputFilterModes
VideoOutputFiltering
DisplaydataisalwayspackedintotheFIFOsin64-bitwordsandmustbeunpackedbeforebeingsentto
thedisplaydatapipeline.Bydefault,dataisunpackedfromrighttoleft.
The8-bitY/CmodeusesthreeFIFOsforcolorseparation.Samplesareunpackedasshownin
Figure4-14.
Figure4-14.8-BitY/CFIFOUnpacking
Thevideooutputfilterperformssimplehardwarescalingandre-samplingonoutgoing8-bitBT.656or8-bit
Y/Cdata.Filteringhardwareisdisabledduringrawdatadisplaymodes.
Theoutputfilterhasfourmodesofoperation:no-filtering,2xscaling,chrominancere-sampling,and2x
scalingwithchrominancere-sampling.FilteroperationisdeterminedbytheDMODE,SCALE,and
RESMPLbitsoftheVDCTL.
Table4-3showstheoutputfiltermodeselection.When8-bitBT.656orY/Cdisplayoperationisselected,
(DMODE=x00),scalingisselectedbysettingtheSCALEbitandchrominancere-samplingisselectedby
settingtheRESMPLbit.If8-bitBT.656orY/Cdisplayisnotselected(DMODE≠x00),filteringisdisabled.
Table4-3.OutputFilterModeSelection
VDCTLBit
DMODERESMPLSCALEFilterOperation
x0000Nofiltering
x00012xscaling
x0010Chrominancere-sampling(fullscale)
x00112xscalingwithchrominancere-sampling
x01xxNofiltering
x10xxNofiltering
x11xxNofiltering
SPRUEM1–May2007VideoDisplayPort103
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