GS2971 Datasheet, PDF (90/148 Pages) Semtech Corporation – 3Gb/s, HD, SD SDI Receiver, with Integrated Adaptive Cable Equalizer complete with SMPTE Audio and Video Processing

• Set the ACS_APPLY bit to HIGH
At the next status boundary, the device outputs the contents of the ACSR registers as
ACS data. This event may occur at a different time for each of the output channels. While
waiting for the status boundary, the device sets the appropriate ACS_APPLY_WAIT[A:D]
flag.
Table 4-24 shows the host interface default settings for the Audio Channel Status block.
The audio de-embedder automatically generates the CRC word.
Table 4-24: Audio Channel Status Information Registers
Name
ACSR[7-0]
ACSR[15-8]
ACSR[23-16]
ACSR[31-24]:
ACSR[183-176]
ACS_REGEN
ACS_APPLY
ACS_APPLY_W
AIT[A:D]
ACS[7-0]:
ACS[183-176]
Description
Default
Audio channel status block byte 0 set. Used when ACS_REGEN is set HIGH
Audio channel status block byte 1 set. Used when ACS_REGEN is set HIGH
Audio channel status block byte 2 set. Used when ACS_REGEN is set HIGH
Audio channel status block data for bytes 3 to 22. Used when ACS_REGEN is set HIGH
85h
08h
28h (SD) 2Ch (HD)
00h
Audio channel status regenerate
0
Apply new ACSR data
0
Waiting to apply new ACSR data
0
Audio channel status block data for bytes 0 to 22
00h: 00h
Table 4-25: Audio Channel Status Block for Regenerate Mode Default Settings
Name
PRO
Emphasis
Sample Frequency
Channel Mode
AUX
Source Word Length
Byte
0
0
0
1
2
2
Bit
Default
Mode
0
1b
Professional use of channel status block
2-4
100b
100b None. Rec. manual override disabled
6-7
01b
48kHz. Manual override or auto disabled
0-3
0001b
Two channels. Manual override disabled
0-2
000b
SD Modes: Maximum audio word length is 20 bits
001b
HD Mode: Maximum audio word length is 24 bits
3-5
101b
Maximum word length (based on AUX setting).
24-bit for HD Mode; 20-bit for SD Modes
All other bits set to zero
GS2971 3Gb/s, HD, SD SDI Receiver
Data Sheet
45898 - 2
September 2012
90 of 148