PNX1311EH NXP Semiconductors, PNX1311EH Datasheet - Page 123

• Manufacturer Part Number: PNX1311EH
• Manufacturer: NXP Semiconductors

Specifications of PNX1311EH

• Lead Free Status / RoHS Status: Not Compliant

Philips Semiconductors
Figure 7-28. Mirroring pixels in 2x upscaling.
• ...
• Output pixel 2N–2 uses pixels N–2, N–1, N, and N–1
• Output pixel 2N–1 uses pixel N to generate its value.
• Output pixel 2N uses pixels N–1, N, N, and N–1 to
Figure 7-28
12 pixels.
7.14
EVO operating modes belong to two groups as follows:
• Video-refresh modes
• Data-transfer modes
Data-transfer modes are further broken down into data-
streaming mode and message-passing mode.
The operating mode is set by the VO_CTL. MODE field
and the VO_CTL. OL_EN (overlay enable) control bit.
The VO_CTL. MODE field determines video-refresh,
message-passing or data-streaming mode. It further de-
fines the video image format and whether or not 2× hori-
zontal upscaling takes place. The OL_EN bit determines
whether a video-refresh mode has a graphics overlay
present. The modes are shown in
Table 7-5. EVO Operating Modes
Mode
0
1
2
3
4
5
6
7
8
to generate its value.
generate its value.
YUV 4:2:2C-1× YUV 4:2:2 co-sited, no scaling
YUV 4:2:2I-1×
YUV 4:2:0-1×
YUV 4:2:2C-2× YUV 4:2:2 co-sited, horizontal 2×
YUV 4:2:2I-2×
YUV 4:2:0-2×
data
streaming
EVO OPERATING MODES
Output Pixels: Y’
Function
Input Pixels: Y
shows an example of six pixels upscaled to
Video-refresh modes
Data-transfer modes
YUV 4:2:2 interspersed, no scaling
YUV 4:2:0, no scaling
upscaling
YUV 4:2:2 interspersed, horizontal
2× upscaling
YUV 4:2:0, horizontal 2× upscaling
continuous transmission of raw 8-bit
data with valid data pulse and level
timing signals
Y’=Y1
1
1
Y’=F(Y1,Y1,Y2,Y3)
Reserved
Reserved
2
Explanation
Table
Y’=Y2
2
3
Y’=F(Y1,Y2,Y3,Y4)
7-5.
4
Y’=Y3
3
5
Y’=F(Y2,Y3,Y4,Y5)
6
Table 7-5. EVO Operating Modes
7.15
If enabled, the PNX1300 implements functions for chro-
ma keying, alpha blending and programmable clipping,
as described in this section.
7.15.1
If
FULL_BLENDING = 1, the EVO provides full 129-layer
alpha blending of a background video image with a fore-
ground graphics overlay image. If either bit is 0, the EVO
implements the cruder 25% step alpha blending resolu-
tion of the TM-1000. Alpha blending can operate in con-
junction
Section
Alpha blending combines a graphics overlay image with
the video image according to an alpha value provided
with each overlay pixel. The graphics overlay is taken
from a pixel-packed YUV 4:2:2+α data structure in mem-
ory. In the YUV 4:2:2+α format, each pixel has a single
α-bit supplied as the LSB of the U and V pixels. The U
byte LSB corresponds to the alpha for pixel Y0, the V
byte LSB for pixel Y1, respectively. When the α-bit is ‘0’,
the ALPHA_ZERO register supplies the actual 8-bit α
value. When the α-bit is ‘1’, the ALPHA_ONE register
supplies the 8-bit α value. In the YUV 4:2:2 format, only
one set of U and V values is supplied for the two Y pixels,
Y0 and Y1. In this case, the alpha bit in U0 determines
the alpha value for U, Y0 and V. The alpha blend bit in
V0 only sets the alpha value for Y1 and does not affect
the U or V values.
The EVO uses the 8-bit content of the selected alpha
blending register (ALPHA_ZERO or ALPHA_ONE) to
determine the amount by which the overlay plane is
merged with the image plane as follows. The least-signif-
icant 7 bits of the selected blending register encode 128
PRELIMINARY SPECIFICATION
Mode
0xA
0xF
—
9
Y’=Y4
enabled
4
7
Y’=F(Y3,Y4,Y5,Y6)
message
passing
VIDEO PROCESSING
7.15.2.
Alpha Blending
Function
with
8
by
chroma
Y’=Y5
5
9
Y’=F(Y4,Y5,Y6,Y6)
setting
transmission of raw 8-bit data with
STMSG and ENDMSG timing sig-
nals
10
keying,
Reserved
EVO_ENABLE = 1
2N–1:
Y’=Y6
Enhanced Video Out
11
6
Y’=F(Y5,Y6,Y6,Y5)
Explanation
as
2N:
12
described
7-13
and
in