SAA7115HLBE NXP Semiconductors, SAA7115HLBE Datasheet - Page 116
![Video ICs ADV DGTL VIDEO DECODR](/photos/27/77/277797/qfp100_sml.jpg)
SAA7115HLBE
Manufacturer Part Number
SAA7115HLBE
Description
Video ICs ADV DGTL VIDEO DECODR
Manufacturer
NXP Semiconductors
Datasheet
1.SAA7115HLBE.pdf
(548 pages)
Specifications of SAA7115HLBE
Operating Supply Voltage
3.3 V
Maximum Operating Temperature
+ 70 C
Package / Case
SOT-407
Minimum Operating Temperature
0 C
Mounting Style
SMD/SMT
Number Of Channels
2
Resolution
8 bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
SAA7115HL/V1,557 SAF7115HLBE
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The SAV and EAV codes have a 4-bit protection field to
ensure valid codes. The EVO generates these protection
bits as part of the SAV and EAV codes as defined by
CCIR 656. There are 8 possible valid SAV and EAV
codes shown with their correct protection bits in
Table
codes and inserts them into the video out data stream ac-
cording to the CCIR 656 specification under all condi-
tions, whether it is generating or receiving horizontal and
frame timing information.
Table 7-3. SAV and EAV codes
7.8.4
SAV and EAV codes are identified by a 3-byte preamble
of 0xFF, 0x00 and 0x00. This combination must be
avoided in the video data output by the EVO to prevent
accidental generation of an invalid sync code. The EVO
provides programmable maximum and minimum value
clipping on the video data to prevent this possibility. If
clipping is enabled, the EVO automatically clips the re-
sulting image data as described in
7.8.5
The interlaced frame timing defined by CCIR 656 is
shown in
for 525-line, 60-Hz systems and from 1 to 625 for 625-
line, 50-Hz systems. The Field and Vertical Blanking col-
umns indicate whether the field and vertical blanking bits,
respectively, are set in the SAV and EAV codes for the
indicated lines. The 525 and 625 formats have similar
timing but differ in their line numbering.
7.9
The EVO generates timing for frames, active video areas
within frames, images within the active video area, and
overlays within the image area. The relationship between
these four is shown in
the timing for both interlaced fields. Progressive scan, or
non-interlaced video, is accomplished by setting the tim-
7-6
Code
SAV
EAV
SAV
EAV
SAV
EAV
SAV
EAV
7-3. The EVO generates SAV and EAV sync
ENHANCED VIDEO OUT TIMING
GENERATION
Table
Video Clipping
CCIR 656 Frame Timing
Binary Value
1000 0000
1001 1101
1010 1011
1011 0110
1101 1010
1100 0111
1110 1100
1111 0001
7-4. Lines are numbered from 1 to 525
PRELIMINARY SPECIFICATION
Figure
Field
1
1
1
1
2
2
2
2
7-13. The frame includes
Section
Vertical Blanking
7.15.3.
X
X
X
X
ing parameters such that two identical successive fields
are generated.
Table 7-4. CCIR 656 frame timing
7.9.1
Shown in
the horizontal and vertical blanking intervals and repre-
sents the pixels visible on the screen. The image area is
the actual displayed image within the active video area.
It can be slightly smaller than the active video area to
avoid edge effects at the top, bottom and sides of the im-
age. The overlay area is within the image area.
The EVO uses counters to generate and control image
timing. The Frame Line Counter and Frame Pixel
Counter control the overall timing for the frame and de-
fine the total number of pixels per line, lines per frame,
and interlace timing, including horizontal and vertical
blanking intervals.
Note that the Frame Line Counter has a starting value of
one, not zero, and it counts from 1 to 525 or 625, consis-
tent with CCIR 656 line numbering. The Image Line
Counter and Image Pixel Counter define the visible im-
age within the field.
The geometry of the active video area is defined by the
contents
Figure
defines the start line of Field 2. Field 2 is active when the
Field Line Counter contents equal or exceed this value.
The active video area is defined by the F1_VIDEO_LINE
and F2_VIDEO_LINE fields of the VO_FIELD register for
each
VIDEO_PIXEL_START field of the VO_LINE register for
each line of the frame. The active video area begins
when the contents of the Frame Line Counter and Frame
Pixel Counter equals or exceeds these values.
264–265
266–282
283–525
20–263
525/60
4–19
1–3
Line Number
7-29. The VO_FRAME. FIELD_2_START field
field
Figure
Active Video Area
of
624–625
311–312
313–335
336–623
23–310
625/50
1–22
several
of
7-13, the active video area begins after
F bit
the
1
0
0
0
1
1
MMIO
Philips Semiconductors
V bit
frame,
1
1
0
1
1
0
registers
Vertical blanking for
Field 1, SAV/EAV
code still indicates
Field 2
Vertical blanking for
Field 1, change
SAV/EAV code to
Field 1
Active video, Field 1
Vertical blanking for
Field 2, SAV/EAV
code still indicates
Field 1
Vertical blanking for
Field 2, change
SAV/EAV code to
Field 2
Active video, Field 2
and
Comments
shown
by
the
in
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