GS2972 Datasheet, PDF (80/125 Pages) Semtech Corporation – 3G/HD/SD-SDI Serializer with Complete SMPTE Audio & Video Support

4.9.13 Processing Feature Disable
The GS2972 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 ST 372 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 GS2972 are shown in Table 4-25 below.
Table 4-23: IOPROC Register Bits
I/O Processing Feature
IOPROC Register Bit
TRS insertion
TRS_INS (000h Bit 0)
Y and C line number insertion
LNUM_INS (000h Bit 1)
Y and C line based CRC insertion
CRC_INS (000h Bit 2)
Ancillary data checksum correction
ANC_CSUM_INS (000h Bit 3)
EDH CRC error calculation and
insertion
EDH_ CRC_INS (000h Bit 4)
Illegal word re-mapping
ILLEGAL_WORD_REMAP (000h Bit 5)
SMPTE ST 352 packet insertion
SMPTE_352M_INS (000h Bit 6)
SMPTE ST 372 conversion
CONV_372 (000h Bit 9)
Audio embedding
AUDIO_EMBED (000h Bit 10)
GS2972 3G/HD/SD-SDI Serializer with Complete
SMPTE Audio & Video Support
Final Data Sheet Rev. 9
GENDOC-047479 September 2013
www.semtech.com
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