TLV320AIC3105_08 BURR-BROWN [Burr-Brown Corporation], TLV320AIC3105_08 Datasheet - Page 77

• Manufacturer Part Number: TLV320AIC3105_08
• Description: LOW-POWER STEREO AUDIO CODEC FOR PORTABLE AUDIO/TELEPHONY
• Manufacturer: BURR-BROWN [Burr-Brown Corporation]

(1) Decay time is limited based on NADC ratio that is selected. For
D6–D5
D4–D2
D1–D0
D6–D5
D4–D2
D1–D0
BIT
BIT
D7
D7
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NADC = 1, Maximum decay time = 4 seconds
NADC = 1.5, Maximum decay time = 5.6 seconds
NADC = 2, Maximum decay time = 8 seconds
NADC = 2.5, Maximum decay time = 9.6 seconds
NADC = 3 or 3.5, Maximum decay time = 11.2 seconds
NADC = 4 or 4.5, Maximum decay time = 16 seconds
NADC = 5, Maximum decay time = 19.2 seconds
NADC = 5.5 or 6, Maximum decay time = 22.4 seconds
In the TLV320AIC3105, the NDAC setting must be the same as the NADC setting. The NDAC ratio is set on page 0, register 2. The
NDAC is set equal to NADC by setting the value of bits D7–D4 equal to that of bits D3–D0.
WRITE
WRITE
READ/
READ/
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Page 0/Register 104: Left AGC New Programmable Decay Time Register
Page 0/Register 105: Right AGC New Programmable Attack Time Register
RESET
VALUE
RESET
VALUE
000
000
00
00
00
00
0
0
Decay Time Register Selection
0: Decay time for the Left AGC is generated from register 26.
1: Decay time for the Left AGC is generated from this register.
Baseline AGC Decay time
00: Left AGC Decay time = 50 ms
01: Left AGC Decay time = 150 ms
10: Left AGC Decay time = 250 ms
11: Left AGC Decay time = 350 ms
Multiplication Factor for Baseline AGC
000: Multiplication factor for the baseline AGC Decay time = 1
001: Multiplication factor for the baseline AGC Decay time = 2
010: Multiplication factor for the baseline AGC Decay time = 4
011: Multiplication factor for the baseline AGC Decay time = 8
100: Multiplication factor for the baseline AGC Decay time = 16
101: Multiplication factor for the baseline AGC Decay time = 32
110: Multiplication factor for the baseline AGC Decay time = 64
111: Multiplication factor for the baseline AGC Decay time = 128
Reserved. Write only zero to these register bits.
Attack Time Register Selection
0: Attack time for the right AGC is generated from register 29.
1: Attack time for the right AGC is generated from this register.
Baseline AGC attack time
00: Right AGC attack time = 7 ms
01: Right AGC attack time = 8 ms
10: Right AGC attack time = 10 ms
11: Right AGC attack time = 11 ms
Multiplication Factor for Baseline AGC
000: Multiplication factor for the baseline AGC attack time = 1
001: Multiplication factor for the baseline AGC attack time = 2
010: Multiplication factor for the baseline AGC attack time = 4
011: Multiplication factor for the baseline AGC attack time = 8
100: Multiplication factor for the baseline AGC attack time = 16
101: Multiplication factor for the baseline AGC attack time = 32
110: Multiplication factor for the baseline AGC attack time = 64
111: Multiplication factor for the baseline AGC attack time = 128
Reserved. Write only zero to these register bits.
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DESCRIPTION
DESCRIPTION
SLAS513A – FEBRUARY 2007 – REVISED JULY 2007
TLV320AIC3105
(1)
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