pnx1700 NXP Semiconductors, pnx1700 Datasheet - Page 794

• Manufacturer Part Number: pnx1700
• Description: Connected Media Processor
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Volume 1 of 1
3. Native Pixel Format Representation
PNX17XX_SER_1
Preliminary data sheet
(For planar YUV 4:2:0 formats, refer to
Figure 1:
31
31
Native Pixel Format Unit Layout
alpha
alpha
alpha
alpha
3.1 Indexed Formats
24
24
23
The indexed formats support a 1, 2, 4 or 8-bit pixel format. For each of the respective
2, 4, 16 or 256 code values, a full look-up for a 24-bit color and 8-bit alpha is
performed, using a subsystem-specific, programmable color look-up table.
Figure 2
within the byte always uses the “first, left-most pixel in most significant bit(s)” packing
convention. Pixel groups from left to right have increasing memory byte addresses.
23
shows the “software view” of the four indexed formats. Packing of pixels
Figure 9
R
V
R
R
1st unit
2nd unit
1st unit
2nd unit
and
Rev. 1 — 17 March 2006
16
16
Figure
31
15
31
15
15
15
15
15
15
alpha
alpha
10.)
R
12 11
12 11
G
G
Y
Y2
U
V
G
Y1
11
10
R
R
24
8
8
24
8
8
8
G
7
7
23
7
23
7
7
7
7
i1
7
7
7
i1
i2 i3 i4 i5 i6 i7 i8
6
G
i1
G
5
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
i2
4
4
4
Chapter 28: Pixel Formats
PNX17xx Series
U
V
Y1
Y2
B
U
i
3
3
i3
B
B
i2
B
i4
16
0
0
0
16
0
0
0
0
0
0
0
0
YUY2 or
2vuy
RGBa 8888
YUVa 444
UYVY
1 bpp index
2 bpp index
4 bpp index
8 bpp index
RGBa 4444
RGBa 4534
RGB 565
28-3