Datasheet
TLV320AIC3106
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........................................................................................................................................ SLAS509E – DECEMBER 2006 – REVISED DECEMBER 2008
Page 0 / Register 26: Left AGC Control Register A
READ/ RESET
BIT DESCRIPTION
WRITE VALUE
D7 R/W 0 Left AGC Enable
0: Left AGC is disabled
1: Left AGC is enabled
D6 – D4 R/W 000 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
D3 – D2 R/W 00 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
D1 – D0 R/W 00 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.
Page 0 / Register 27: Left AGC Control Register B
READ/ RESET
BIT DESCRIPTION
WRITE VALUE
D7 – D1 R/W 1111 111 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
D0 R/W 0 Reserved. Write only zero to this register bit.
Page 0 / Register 28: Left AGC Control Register C
READ/ RESET
BIT 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
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
D0 R/W 0 Left AGC Clip Stepping Control
0: Left AGC clip stepping disabled
1: Left AGC clip stepping enabled
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