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GS1560A/GS1561 Data Sheet
27360 - 8
September 2005
64 of 80
The EDH_FLAG register may be read by the host interface at any time during the
received frame except on the lines defined in SMPTE RP165 where these flags are
updated.
NOTE 1: By programming the ANC_TYPE1 register (005h) with the DID word for
EDH ancillary packets, the application layer may detect a high-to-low transition on
either the YANC or CANC output pin of the GS1560A/GS1561 to determine (a)
when EDH packets have been received by the device, and (b) when the
EDH_FLAG register can be read by the host interface. See
Ancillary Data
Detection and Indication on page 48
for more information on ancillary data
detection and indication.
NOTE 2: The bits of the EDH_FLAG register are sticky and will not be cleared by
a read operation. If the GS1560A/GS1561 is decoding a source containing EDH
packets, where EDH flags may be set, and the source is replaced by one without
EDH packets, the EDH_FLAG register will not be cleared.
NOTE 3: The GS1560A/GS1561 will detect EDH flags, but will not update the flags
if an EDH CRC error is detected. Gennum's GS1532 Multi-Rate Serializer allows
the host to individually set EDH flags.
Table 3-15: Host Interface Description for EDH Flag Register
Register
Name
Bit
Name
Description
R/W
Default
EDH_FLAG
Address: 003h
15
–
Not Used.
–
–
14
ANC-UES out
Ancillary Unknown Error Status Flag.
R
0
13
ANC-IDA out
Ancillary Internal device error Detected Already Flag.
R
0
12
ANC-IDH out
Ancillary Internal device error Detected Here Flag.
R
0
11
ANC-EDA out
Ancillary Error Detected Already Flag.
R
0
10
ANC-EDH out
Ancillary Error Detected Here Flag.
R
0
9
FF-UES out
Full Field Unknown Error Status Flag.
R
0
8
FF-IDA out
Full Field Internal device error Detected Already Flag.
R
0
7
FF-IDH out
Full Field Internal device error Detected Here Flag.
R
0
6
FF-EDA out
Full Field Error Detected Already Flag.
R
0
5
FF-EDH out
Full Field Error Detected Here Flag.
R
0
4
AP-UES out
Active Picture Unknown Error Status Flag.
R
0
3
AP-IDA out
Active Picture Internal device error Detected Already Flag.
R
0
2
AP-IDH out
Active Picture Internal device error Detected Here Flag.
R
0
1
AP-EDA out
Active Picture Error Detected Already Flag.
R
0
0
AP-EDH out
Active Picture Error Detected Here Flag.
R
0