Datasheet

TLV320AIC3107
www.ti.com SLOS545D –NOVEMBER 2008–REVISED DECEMBER 2014
Table 32. Page 0 / Register 26: Left AGC Control Register A
BIT READ/ RESET 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-msec
01: Left AGC attack time = 11-msec
10: Left AGC attack time = 16-msec
11: Left AGC attack time = 20-msec
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-msec
01: Left AGC decay time = 200-msec
10: Left AGC decay time = 400-msec
11: Left AGC decay time = 500-msec
(1) Time constants are valid when DRA is not enabled. The values would change if DRA is enabled.
Table 33. Page 0 / Register 27: Left AGC Control Register B
BIT READ/ RESET DESCRIPTION
WRITE VALUE
D7-D1 R/W 1111111 Left AGC Maximum Gain Allowed
0000000: Maximum gain = 0.0 dB
0000001: Maximum gain = 0.5 dB
0000010: Maximum gain = 1.0 dB
…
1110110: Maximum gain = 59.0 dB
1110111–111111: Maximum gain = 59.5 dB
D0 R/W 0 Reserved. Write only zero to this register bit.
Table 34. 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 = 4 dB
11: Hysteresis is disabled
D5–D1 R/W 00000 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
Copyright © 2008–2014, Texas Instruments Incorporated Submit Documentation Feedback 55
Product Folder Links: TLV320AIC3107