GS9090 Data Sheet
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. If both DID and SDID values are non-zero, then
the received ancillary data type must match both the DID and SDID cases before
the device will assert ANC_DETECT HIGH.
In the case where all five DID and SDID values are set to zero, the GS9090 will
detect all ancillary data types. This is the default setting after a 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: See SMPTE 291M for a definition of ancillary data terms.
Table 3-4: Host Interface Description for Programmable Ancillary Data Type registers
Register Name
Bit
Name
Description
R/W
Default
ANC_TYPE 1
Address: 0Ah
15-8
ANC_TYPE1[15:8]
Used to program the DID for ancillary data
detection at ANC_DETECT output
R/W
0
7-0
ANC_TYPE1[7:0]
Used to program the SDID for ancillary data
detection at ANC_DETECT output. Should be
set to zero if no SDID is present in the ancillary
data packet to be detected.
R/W
0
ANC_TYPE 2
Address: 0Bh
15-8
7-0
ANC_TYPE2[15:8]
ANC_TYPE2[7:0]
Used to program the DID for ancillary data
detection at ANC_DETECT output
R/W
R/W
0
0
Used to program the SDID for ancillary data
detection at ANC_DETECT output. Should be
set to zero if no SDID is present in the ancillary
data packet to be detected.
ANC_TYPE 3
Address: 0Ch
15-8
7-0
ANC_TYPE3[15:8]
ANC_TYPE3[7:0]
Used to program the DID for ancillary data
detection at ANC_DETECT output
R/W
R/W
0
0
Used to program the SDID for ancillary data
detection at ANC_DETECT output. Should be
set to zero if no SDID is present in the ancillary
data packet to be detected.
ANC_TYPE 4
Address: 0Dh
15-8
7-0
ANC_TYPE4[15:8]
ANC_TYPE4[7:0]
Used to program the DID for ancillary data
detection at ANC_DETECT output
R/W
R/W
0
0
Used to program the SDID for ancillary data
detection at ANC_DETECT output. Should be
set to zero if no SDID is present in the ancillary
data packet to be detected.
ANC_TYPE 5
Address: 0Eh
15-8
7-0
ANC_TYPE5[15:8]
ANC_TYPE5[7:0]
Used to program the DID for ancillary data
detection at ANC_DETECT output
R/W
R/W
0
0
Used to program the SDID for ancillary data
detection at ANC_DETECT output. Should be
set to zero if no SDID is present in the ancillary
data packet to be detected.
28201 - 1 July 2005
32 of 70
GENNUM [ GENNUM CORPORATION ]
