TLV320AIC3106_15 Datasheet, PDF (57/105 Pages) Texas Instruments – TLV320AIC3106 Low-Power Stereo Audio CODEC for Portable Audio/Telephony

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TLV320AIC3106
SLAS509F – DECEMBER 2006 – REVISED DECEMBER 2014
Table 34. Page 0 / Register 26: Left AGC Control Register A
BIT
READ/
WRITE
D7
R/W
D6–D4 R/W
D3–D2 R/W
D1–D0 R/W
RESET
VALUE
0
000
00
00
DESCRIPTION
Left AGC Enable
0: Left AGC is disabled
1: Left AGC is enabled
Left AGC Target Level
000: Left AGC target level = –5.5 dB
001: Left AGC target level = –8 dB
010: Left AGC target level = –10 dB
011: Left AGC target level = –12 dB
100: Left AGC target level = –14 dB
101: Left AGC target level = –17 dB
110: Left AGC target level = –20 dB
111: Left AGC target level = –24 dB
Left AGC Attack Time
These time constants⁽¹⁾ will not be accurate when double rate audio mode is enabled.
00: Left AGC attack time = 8 ms
01: Left AGC attack time = 11 ms
10: Left AGC attack time = 16 ms
11: Left AGC attack time = 20 ms
Left AGC Decay Time
These time constants⁽¹⁾ will not be accurate when double rate audio mode is enabled.
00: Left AGC decay time = 100 ms
01: Left AGC decay time = 200 ms
10: Left AGC decay time = 400 ms
11: Left AGC decay time = 500 ms
(1) Time constants are valid when DRA is not enabled. The values would change if DRA is enabled.
BIT
D7–D1
READ/
WRITE
R/W
D0
R/W
Table 35. Page 0 / Register 27: Left AGC Control Register B
RESET
VALUE
1111 111
0
DESCRIPTION
Left 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
Reserved. Write only zero to this register bit.
BIT
D7–D6
READ/
WRITE
R/W
D5–D1 R/W
D0
R/W
Table 36. Page 0 / Register 28: Left AGC Control Register C
RESET
VALUE
00
00 000
0
DESCRIPTION
Noise Gate Hysteresis Level Control
00: Hysteresis = 1 dB
01: Hysteresis = 2 dB
10: Hysteresis = 3 dB
11: Hysteresis is disabled
Left AGC Noise Threshold Control
00 000: Left AGC Noise/Silence Detection disabled
00 001: Left AGC noise threshold = –30 dB
00 010: Left AGC noise threshold = –32 dB
00 011: Left AGC noise threshold = –34 dB
…
11 101: Left AGC noise threshold = –86 dB
11 110: Left AGC noise threshold = –88 dB
11 111: Left AGC noise threshold = –90 dB
Left AGC Clip Stepping Control
0: Left AGC clip stepping disabled
1: Left AGC clip stepping enabled
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