GS1503BCVE2 GENNUM [Gennum Corporation], GS1503BCVE2 Datasheet - Page 25

• Manufacturer Part Number: GS1503BCVE2
• Description: HD Embedded Audio CODEC Data Sheet
• Manufacturer: GENNUM [Gennum Corporation]

4.5.3 Video Output CRC Insertion
When the CRC_INS bit 4 of Host Interface register 000h is set HIGH, the GS1503B 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.
Table 4-11: Register Settings
4.5.4 Illegal Code Re-mapping
When LIMIT_ON bit 4 of Host Interface register 008h is set HIGH, input video words
between 000-003 are re-mapped to 004, and values between 3FC-3FF are re-mapped to
3FB. Valid only when the EXT_SEL bit 3 of Host Interface register 000h is set HIGH.
Table 4-12: Register Settings
4.5.5 Input Blanking
When VBLK_INS bit 3 of Host Interface register 008h is set HIGH, the input video vertical
blanking will be set to 040h for the Luma channel and 200h for the Chroma channel.
When HBLK_INS bit 2 of Host Interface register 008h is set HIGH, the input video
horizontal blanking will be set to 040h for the Luma channel and 200h for the Chroma
channel. The TRS, line number and CRC words will also be set to blanking values.
The blanking function is performed at the output of the GS1503B video data stream. If
the HBLK_INS bit is set HIGH, any multiplexed audio will be replaced with blanking
codes.
Table 4-13: Register Settings
GS1503B HD Embedded Audio CODEC
Data Sheet
37953 - 1
Name
CRC_INS
Name
EXT_SEL
LIMIT_ON
Name
VBLK_INS
HBLK_INS
December 2009
Description
0: EXTH/EXTF output select
1: EXTH/EXTF input select
Illegal code re-mapping (1: Enabled)
Description
Input vertical blanking (1: Enabled)
Input horizontal blanking (1: Enabled)
Description
Video line CRC insertion (1: Insertion)
Address
Address
008
008
Address
001
008
000
Bit
Bit
Bit
3
2
3
4
4
Setting
Setting
Setting
1
1
1
1
1
Default
Default
Default
0
0
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1
0
0