GS1559 Gennum Corp., GS1559 Datasheet - Page 45

• Manufacturer Part Number: GS1559
• Description: GS1559 HD-LINX-TM II Multi-Rate Deserializer with Loop-Through Cable Driver
• Manufacturer: Gennum Corp.

4.10.2.1 Programmable Ancillary Data Detection
Table 4-5: Host Interface Description for Programmable Ancillary Data Type Registers
Register Name
ANC_TYPE1
Address: 005h
ANC_TYPE2
Address: 006h
ANC_TYPE3
Address: 007h
Bit
15-8
7-0
15-8
7-0
15-8
7-0
Name
ANC_TYPE1[15:8]
ANC_TYPE1[7:0]
ANC_TYPE2[15:8]
ANC_TYPE2[7:0]
ANC_TYPE3[15:8]
ANC_TYPE3[7:0]
Although the GS1559 will detect all types of ancillary data by default, it also allows
the host interface to specifically program up to five different ancillary data types for
detection. This is accomplished via the ANC_TYPE register
For each data type to be detected, the host interface must program the DID and/or
SDID of the ancillary data type of interest. The GS1559 will compare the received
DID and/or SDID with the programmed values and assert YANC and CANC only if
an exact match is found.
If any DID or SDID value is set to zero in the ANC_TYPE register, no comparison
or match will be made for that value. For example, if the DID is programmed but
the SDID is set to zero, the device will detect all ancillary data types matching the
DID value, regardless of the SDID.
In the case where all five DID and SDID values are set to zero, the GS1559 will
detect all ancillary data types. This is the default setting after device reset.
Where one or more, but less than five, DID and/or SDID values have been
programmed, then only those matching ancillary data types will be detected and
indicated.
NOTE 1: The GS1559 will always detect EDH ancillary data packets for EDH error
detection purposes, regardless of which DID/SDID values have been programmed
for ancillary data indication, (see
NOTE 2: See SMPTE 291M for a definition of ancillary data terms.
30572 - 4
July 2005
Description
Used to program the DID for ancillary data detection at
the YANC and CANC output
Used to program the SDID for ancillary data detection
at the YANC and CANC output.
Should be set to zero if no SDID is present in the
ancillary data packet to be detected.
Used to program the DID for ancillary data detection at
the YANC and CANC output
Used to program the SDID for ancillary data detection
at the YANC and CANC output.
Should be set to zero if no SDID is present in the
ancillary data packet to be detected.
Used to program the DID for ancillary data detection at
the YANC and CANC output
Used to program the SDID for ancillary data detection
at the YANC and CANC output.
Should be set to zero if no SDID is present in the
ancillary data packet to be detected.
EDH CRC Error Detection on page
GS1559 Data Sheet
(Table
R/W
R/W
R/W
R/W
R/W
R/W
R/W
4-5).
53).
Default
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0
0
0
0
0
0