GS2962 Datasheet, PDF (56/82 Pages) Gennum Corporation – Integrated Narrow-Bandwidth PLL

EDH error flags EDH, EDA, IDH, IDA and UES for ancillary data, full field and active
picture are also inserted.
• When the EDH_CRC_UPDATE bit of the host interface is set LOW, these flags are
sourced from the ANC_EDH_FLAG, FF_EDH_FLAG and AP_EDH_FLAG registers of
the device, where they are programmed by the application layer
• When the EDH_CRC_UPDATE bit of the host interface is set HIGH, incoming EDH
flags are preserved and inserted in the outgoing EDH packets. In this mode the
ANC_EDH_FLAG, FF_EDH_FLAG and AP_EDH_FLAG registers contain the
incoming EDH flags, and will be read only
The GS2962 generates all of the required EDH packet data including all ancillary data
preambles: DID, DBN, DC, reserved code words and checksum.
The prepared EDH packet is inserted at the appropriate line of the video stream (in
accordance with RP165). The start pixel position of the inserted packet is based on the
SAV position of that line, such that the last byte of the EDH packet (the checksum) is
placed in the sample immediately preceding the start of the SAV TRS word.
NOTE 1: When the EDH_CRC_UPDATE bit of the host interface is set LOW, it is the
responsibility of the application interface to ensure that the EDH flag registers are
updated regularly (once per field).
NOTE 2: It is also the responsibility of the application interface to ensure that there is
sufficient space in the horizontal blanking interval for the EDH packet to be inserted.
4.8.11 SMPTE 372M Conversion
When the IOPROC_EN/DIS pin is HIGH and the CONV_372 bit in the IOPROC register is
LOW, the GS2962 converts SMPTE 425M Level A mapping 1 (1080P 4:2:2) to Level B
SMPTE 372M dual link prior to serialization.
4.8.12 Processing Feature Disable
The GS2962 contains an IOPROC register. This register contains one bit for each
processing feature, allowing the user to enable/disable each process individually.
By default (at power up or after system reset), all of the IOPROC register bits are LOW,
except for the SMPTE 372M conversion.
To disable an individual processing feature, the application interface must set the
corresponding bit HIGH in the IOPROC register. To enable these features, the
IOPROC_EN/DIS pin must be HIGH, and the individual feature must be enabled by
setting bits LOW in the IOPROC register of the host interface.
The I/O processing functions supported by the GS2962 are shown in Table 4-7 below.
GS2962 3G/HD/SD-SDI Serializer with Complete
SMPTE Video Support
Data Sheet
48005 - 7
October 2010
56 of 82