Datasheet

TLV320AIC3104
SLAS510C –FEBRUARY 2007–REVISED DECEMBER 2010 www.ti.com
Page 0/Register 28: Left-AGC Control Register C
BIT READ/ RESET DESCRIPTION
WRITE VALUE
D7–D6 R/W 00 Noise Gate Hysteresis Level Control
00: Hysteresis = 1 dB
01: Hysteresis = 2 dB
10: Hysteresis = 3 dB
11: Hysteresis is disabled.
D5–D1 R/W 00 000 Left-AGC Noise Threshold Control
00000: Left-AGC noise/silence detection disabled
00001: Left-AGC noise threshold = –30 dB
00010: Left-AGC noise threshold = –32 dB
00011: Left-AGC noise threshold = –34 dB
…
11101: Left-AGC noise threshold = –86 dB
11110: Left-AGC noise threshold = –88 dB
11111: Left-AGC noise threshold = –90 dB
D0 R/W 0 Left-AGC Clip Stepping Control
0: Left-AGC clip stepping disabled
1: Left-AGC clip stepping enabled
Page 0/Register 29: Right-AGC Control Register A
BIT READ/ RESET DESCRIPTION
WRITE VALUE
D7 R/W 0 Right-AGC Enable
0: Right AGC is disabled.
1: Right AGC is enabled.
D6–D4 R/W 000 Right-AGC Target Level
000: Right-AGC target level = –5.5 dB
001: Right-AGC target level = –8 dB
010: Right-AGC target level = –10 dB
011: Right-AGC target level = –12 dB
100: Right-AGC target level = –14 dB
101: Right-AGC target level = –17 dB
110: Right-AGC target level = –20 dB
111: Right-AGC target level = –24 dB
D3–D2 R/W 00 Right-AGC Attack Time
These time constants are not accurate when double-rate audio mode is enabled.
00: Right-AGC attack time = 8 ms
01: Right-AGC attack time = 11 ms
10: Right-AGC attack time = 16 ms
11: Right-AGC attack time = 20 ms
D1–D0 R/W 00 Right-AGC Decay Time
These time constants are not accurate when double-rate audio mode is enabled.
00: Right-AGC decay time = 100 ms
01: Right-AGC decay time = 200 ms
10: Right-AGC decay time = 400 ms
11: Right-AGC decay time = 500 ms
Page 0/Register 30: Right-AGC Control Register B
BIT READ/ RESET DESCRIPTION
WRITE VALUE
D7–D1 R/W 1111 111 Right-AGC Maximum Gain Allowed
0000 000: Maximum gain = 0 dB
0000 001: Maximum gain = 0.5 dB
0000 010: Maximum gain = 1 dB
…
1110 110: Maximum gain = 59 dB
1110 111–1111 111: Maximum gain = 59.5 dB
D0 R/W 0 Reserved. Write only zero to this bit.
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