GS2972 Datasheet, PDF (100/125 Pages) Semtech Corporation – 3G/HD/SD-SDI Serializer with Complete SMPTE Audio & Video Support

Table 4-34: Video Core Configuration and Status Registers (Continued)
Address Register Name Bit Name
210h
TDO_DS
DRIVE_STRENGTH2
211h to
232h
RSVD
RSVD
RSVD
Bit Description
15-14
13-0
Drive strength value for TDO pin.
00: 4mA;
01: 6mA;
10: 8mA(+1.8V), 10mA(+3.3V);
11: 10mA(+1.8V), 12mA(+3.3V)
Reserved.
15-0 Reserved.
R/W Default
R/W
0
R/W
0
R
0
4.14.2 SD Audio Core
Table 4-35: SD Audio Core Configuration and Status Registers
Address Register Name Bit Name
CTR_AGR
AGR
ONE_AGR
400h
CFG_AUD
CTRB_ON
CLEAR_AUDIO
AFNB_AUTO
CTRA_ON
AUDIO_24BIT
Bit Description
Selects replacement of audio
control packets.
15
LOW - Do not replace audio
control packets
HIGH - Replace all audio control
packets
14
Selects Audio Group Replacement
operating mode. Active HIGH.
Specifies the replacement of just
the primary group.
13 _{LOW - Replace both the primary}
and secondary groups HIGH -
Replace only the primary group
Specifies the embedding of the
12 secondary group audio control
packets. Active HIGH.
Clears all audio FIFO buffers and
11 puts them in the start-up state.
Active HIGH.
Enables Secondary group audio
10 frame number generation. Active
HIGH.
Specifies the embedding of
9
primary group audio control
packets. Active HIGH.
Specifies the sample size for
embedded audio.
8
HIGH - 24-bit
LOW - 20-bit/16-bit
R/W Default
R/W
0
R/W
0
R/W
0
R/W
1
R/W
0
R/W
1
R/W
1
R/W
0
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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