Table 4-14: Host Interface Description for Internal Processing Disable Register
Register Name
Bit
Name
Description
R/W
Default
IOPROC_DISABLE
Address: 000h
15-9
8
–
Not Used.
–
–
H_CONFIG
Horizontal sync timing output configuration. Set
LOW for active line blanking timing. Set HIGH for
H blanking based on the H bit setting of the TRS
words. See Figure 4-2.
0
7-6
5
–
Not Used.
–
–
ILLEGAL_REMAP
Illegal Code re-mapping. Correction of illegal
code words within the active picture. Set HIGH to
disable. The IOPROC_EN/DIS pin must be set
HIGH.
R/W
0
4
EDH_CRC_INS
Error Detection & Handling (EDH) Cyclical
Redundancy Check (CRC) error correction
insertion. In SD mode set HIGH to disable. The
IOPROC_EN/DIS pin must be set HIGH.
R/W
0
3
2
ANC_CSUM_INS
CRC_INS
Ancillary Data Check-sum insertion. Set HIGH to
disable. The IOPROC_EN/DIS pin must be set
HIGH.
R/W
R/W
0
0
Y and C line based CRC insertion. In HD mode,
inserts line based CRC words in both the Y and C
channels. Set HIGH to disable. The
IOPROC_EN/DIS pin must be set HIGH.
1
0
LNUM_INS
TRS_INS
Y and C line number insertion. In HD mode set
HIGH to disable. The IOPROC_EN/DIS pin must be
set HIGH.
R/W
R/W
0
0
Timing Reference Signal Insertion. Set HIGH to
disable. The IOPROC_EN/DIS pin must be set
HIGH.
4.10.6.1 Illegal Code Remapping
If the ILLEGAL_REMAP bit of the IOPROC_DISABLE register is set LOW, the GS1559 will
remap all codes within the Active Picture between the values of 3FCh and 3FFh to 3FBh.
All codes within the Active Picture area between the values of 000h and 003h will be
re-mapped to 004h.
In addition, 8-bit TRS and ancillary data preambles will be remapped to 10-bit values if
this feature is enabled.
4.10.6.2 EDH CRC Error Correction
The GS1559 will generate and insert Active Picture and Full Field CRC words into the
EDH data packets received by the device. This feature is only available in SD mode and
is enabled by setting the EDH_CRC_INS bit of the IOPROC_DISABLE register LOW.
EDH CRC calculation ranges are described in EDH CRC Error Detection on page 50.
NOTE: Although the GS1559 will modify and insert EDH CRC words and EDH packet
checksums, EDH error flags will not be updated by the device.
GS1559 HD-LINX™ II Multi-Rate Deserializer with
Loop-Through Cable Driver
Data Sheet
54 of 71
30572 - 8
July 2008
GENNUM [ GENNUM CORPORATION ]
