ALXD800EEXJ2VD AMD (ADVANCED MICRO DEVICES), ALXD800EEXJ2VD Datasheet - Page 399
ALXD800EEXJ2VD
Manufacturer Part Number
ALXD800EEXJ2VD
Description
Manufacturer
AMD (ADVANCED MICRO DEVICES)
Datasheet
1.ALXD800EEXJ2VD.pdf
(675 pages)
Specifications of ALXD800EEXJ2VD
Operating Temperature (min)
0C
Operating Temperature (max)
85C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Lead Free Status / RoHS Status
Compliant
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Video Processor
6.7.6.4
The output from the Video Processor is connected via a
24-bit bus. Bytes on this bus are aligned as shown below:
The VOP takes this 24-bit 4:4:4 data bus and converts it to
a 16-bit 4:2:2 data bus (the Y component on the high byte,
the U/V components alternating on the low byte).
The VOP provides three different methods for translating
from 4:4:4 to 4:2:2 data depending on the value of the
mode select bits from the VOP Configuration register (VP
Memory Offset 800h[5:4]) as shown in Table 6-61.
Mode 0: 4:2:2 Co-sited
In this mode, the U/V samples are dropped on alternating
sample sets, resulting in the below representation.
Sampling algorithm:
Y, U, V : 4:4:4 Input data
Y’, U’, V’ : 4:2:2 Sampled data
Y1’ = Y1, U1’ = U1, V1’ = V1
Y2’ = Y2
Y3’ = Y3, U3’ = U3, V3’ = V3
etc.
AMD Geode™ LX Processors Data Book
Mode
0
1
2
[23:16]
[15:8]
[7:0]
Interface to Video Processor
Bits
00
01
10
Y
Cr (V)
Cb (U)
Table 6-61. VOP Mode
Luminance (Y) Samples
Chromance (U,V) Samples
Description
4:2:2 Co-sited (Recommended)
4:2:2 Interspersed
4:2:2 Interspersed, free-running
Mode 1: 4:2:2 Interspersed
In this mode, adjacent pairs of U/V sample data are aver-
aged, with the U/V samples coming from the same adja-
cent sample sets.
Sampling algorithm:
Y, U, V : 4:4:4 Input data
Y’, U’, V’ : 4:2:2 Sampled data
Y1’ = Y1, U1’ = (U1+U2)/2, V1’ = (V1+V2)/2
Y2’ = Y2
Y3’ = Y3, U3’ = (U3+U4)/2, V3’ = (V3+V4)/2
etc.
Mode 2: 4:2:2 Interspersed (free-running)
This mode is the same as Mode 1 with the exception that
the U sample is averaged between the first two samples,
and the V sample is averaged between the second and
third samples.
Sampling algorithm:
Y, U, V : 4:4:4 Input data
Y’, U’, V’ : 4:2:2 Sampled data
Y1’ = Y1, U1’ = (U1+U2)/2
Y2’ = Y2, V2’ = (V2+V3)/2
Y3’ = Y3, U3’ = (U3+U4)/2
Y4’ = Y4, V3’ = (V4+V5)/2
etc.
Luminance (Y) Samples
Chromance (U,V) Samples
Luminance (Y) Samples
Chromance (U) Samples
Chromance (V) Samples
33234C
399
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