GS2962 Datasheet, PDF (42/82 Pages) Gennum Corporation – Integrated Narrow-Bandwidth PLL

The GS2962 does not provide error checking or correction to the ANC data provided by
user via the host interface. It is the responsibility of the user to ensure that all data
provided for insertion is fully standard compliant.
In 3G Level A mode, ancillary data packets are inserted into Data Stream One or Data
Stream Two as selected by the host interface. The default insertion will be in Data Stream
One. See address 02Dh, STREAM_TYPE1_LINE_X.
In 3G Level B mode, ancillary data packets are inserted into the Y or C video stream of
Link A or Link B as selected by the user in the host interface. The default insertion will
be in the Y video stream of Link A. For Link A or Link B, see Register 02Dh. For Y or C, see
Registers 026h, 028h, 02Ah and 02Ch.
In HD mode, ANC data packets are inserted into the Y or C video stream, as selected via
the host interface. The default insertion will be in the Y stream. For Y or C, see Registers
026h, 028h, 02Ah and 02Ch.
In SD mode, the ANC data packets are inserted into the multiplexed CbYCr data stream.
ANC data insertion only takes place if the IOPROC_EN/DIS pin is HIGH and
SMPTE_BYPASS is HIGH.
In addition to this, the GS2962 requires the ANC_INS bit to be set LOW in the IOPROC
register.
4.7.1 ANC Insertion Operating Modes
User selection of one of the two operating modes is provided through host interface
configuration, using the ANC_INS_MODE register bit (see Table 4-16: Configuration and
Status Registers).
The supported operating modes are Concatenated mode and Separate Line operating
mode.
By default (at power up or after system reset), the Separate Line operating mode is
enabled.
Ancillary data packets are programmed into the ANC_PACKET_BANK host register at
addresses 040h to BFFh.
4.7.1.1 Separate Line Operating Mode
In Separate Line mode, it is possible to insert horizontal or vertical ancillary data on up
to four lines per video frame. HANC or VANC can be specified, independently of each
other, on a per-line basis. 025h FIRST_LINE_NUMBER, 027h SECOND_LINE_NUMBER,
029h THIRD_LINE_NUMBER and 02Bh FOURTH_LINE_NUMBER. For each of the four
video lines, up to 128 8-bit HANC or VANC data words can be inserted. Separate Line
mode is selected by setting the ANC_INS_MODE bit in the host interface LOW. By
default, at power up, Separate Line mode is selected.
The lines on which ancillary data is to be inserted is programmed in the host register
addresses 025h to 02Ch.
GS2962 3G/HD/SD-SDI Serializer with Complete
SMPTE Video Support
Data Sheet
48005 - 7
October 2010
42 of 82