GS1560A/GS1561 Data Sheet
Table 3-14: 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.
–
–
0
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 3-2.
7-6
5
–
Not Used.
–
–
0
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
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.
3.10.6.1 Illegal Code Remapping
If the ILLEGAL_REMAP bit of the IOPROC_DISABLE register is set LOW, the
GS1560A 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.
3.10.6.2 EDH CRC Error Correction
The GS1560A/GS1561 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 58.
NOTE: Although the GS1560A/GS1561 will modify and insert EDH CRC words
and EDH packet checksums, EDH error flags will not be updated by the device.
27360 - 8 September 2005
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