GS1503 Ver la hoja de datos (PDF) - Gennum -> Semtech
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GS1503 Datasheet PDF : 83 Pages
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1.5 VIDEO DATA PROCESSING
1.5.1 Video Signal Input Detection
The GS1503 will set the VIDEO_DET external pin HIGH
when three consecutive TRS are detected in the input video
signal. Also, the VIDEO_DET bit of Host Interface register
000h is set HIGH.
Register Settings
NAME
VIDEO_DET
DESCRIPTION
Video input signal detection (1: Detection)
1.5.2 Video Input CRC Error Detection
The GS1503 will set the CRC_ERR external pin HIGH when
a CRC error is detected in the input video signal. Also, the
CRC_ERR bit 5 of Host Interface register 000h is set HIGH.
The number of CRC errors accumulated in one video frame
can be read form CRC_CNT[11:0] in Host Interface
registers 006h and 007h.
ADDRESS
BIT
SETTING DEFAULT
000
6
-
0
Register Settings
NAME
CRC_ERR
CRC_CNT[11:0]
DESCRIPTION
Video input signal CRC error detection (1: Detection)
Video input signal CRC error accumulation in 1 video
frame
1.5.3 Video Output CRC Insertion
When the CRC_INS bit 4 of Host Interface register 000h is
set HIGH, the GS1503 will re-calculate the video line CRC
words. The re-calculated CRC words are inserted in the
video output signal. When CRC_INS is set LOW, the line
CRC words are not updated and existing CRC words at the
input of the device will be output unchanged.
ADDRESS
000
006
007
BIT
SETTING DEFAULT
5
-
0
3-0
-
0
7-0
Register Settings
NAME
CRC_INS
DESCRIPTION
Video line CRC insertion (1: Insertion)
ADDRESS
000
BIT
SETTING DEFAULT
4
1
1
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