Datasheet

TLV320AIC3100
SLAS667A –NOVEMBER 2009–REVISED MAY 2012 www.ti.com
Page 1 / Register 47: MIC PGA
READ/ RESET
BIT DESCRIPTION
WRITE VALUE
D7 R/W 1 0: MIC PGA is controlled by bits D6–D0.
1: MIC PGA is at 0 dB.
D6–D0 R/W 000 0000 000 0000: PGA = 0 dB
000 0001: PGA = 0.5 dB
000 0010: PGA = 1 dB
...
111 0110: PGA = 59 dB
111 0111: PGA = 59.5 dB
111 1000–111 1111: Reserved. Do not write these sequences to these bits.
Page 1 / Register 48: Delta-Sigma Mono ADC Channel Fine-Gain Input Selection for P-Terminal
READ/ RESET
BIT DESCRIPTION
WRITE VALUE
D7–D6 R/W 00 00: MIC1LP is not selected for the MIC PGA.
(1)
01: MIC1LP is selected for the MIC PGA with feed-forward resistance RIN = 10 kΩ.
10: MIC1LP is selected for the MIC PGA with feed-forward resistance RIN = 20 kΩ.
11: MIC1LP is selected for the MIC PGA with feed-forward resistance RIN = 40 kΩ.
D5–D4 R/W 00 00: MIC1RP is not selected for the MIC PGA.
01: MIC1RP is selected for the MIC PGA with feed-forward resistance RIN = 10 kΩ
10: MIC1RP is selected for the MIC PGA with feed-forward resistance RIN = 20 kΩ
11: MIC1RP is selected for the MIC PGA with feed-forward resistance RIN = 40 kΩ
D3–D2 R/W 00 00: MIC1LM is not selected for the MIC PGA.
01: MIC1LM is selected for the MIC PGA with feed-forward resistance RIN = 10 kΩ
10: MIC1LM is selected for the MIC PGA with feed-forward resistance RIN = 20 kΩ
11: MIC1LM is selected for the MIC PGA with feed-forward resistance RIN = 40 kΩ
D1–D0 R/W 00 Reserved. Write only zeros to these bits.
(1) Input impedance selection affects the microphone PGA gain. See the Analog Front End section for details.
Page 1 / Register 49: ADC Input Selection for M-Terminal
READ/ RESET
BIT DESCRIPTION
WRITE VALUE
D7–D6 R/W 00 00: CM is not selected for the MIC PGA.
(1)
01: CM is selected for the MIC PGA with feed-forward resistance RIN = 10 kΩ.
10: CM is selected for the MIC PGA with feed-forward resistance RIN = 20 kΩ.
11: CM is selected for the MIC PGA with feed-forward resistance RIN = 40 kΩ.
D5–D4 00 00: MIC1LM is not selected for the MIC PGA.
01: MIC1LM is selected for the MIC PGA with feed-forward resistance RIN = 10 kΩ.
10: MIC1LM is selected for the MIC PGA with feed-forward resistance RIN = 20 kΩ.
11: MIC1LM is selected for the MIC PGA with feed-forward resistance RIN = 40 kΩ.
D3–D0 R/W 0000 Reserved. Write only zeros to these bits.
(1) Input impedance selection affects the microphone PGA gain. See the Analog Front End section for details.
Page 1 / Register 50: Input CM Settings
READ/ RESET
BIT DESCRIPTION
WRITE VALUE
D7 R/W 0 0: MIC1LP input is floating, if it is not used for the MIC PGA and analog bypass.
1: MIC1LP input is connected to CM internally, if it is not used for the MIC PGA and analog bypass.
D6 R/W 0 0: MIC1RP input is floating, if it is not used for the MIC PGA and analog bypass.
1: MIC1RP input is connected to CM internally, if it is not used for the MIC PGA and analog bypass.
D5 R/W 0 0: MIC1LM input is floating, if it is not used for the MIC PGA.
1: MIC1LM input is connected to CM internally, if it is not used for the MIC PGA.
D4–D1 R/W 0000 Reserved. Write only zeros to these bits.
D0 R 0 0: Not all programmed analog gains to the ADC have been applied yet.
1: All programmed analog gains to the ADC have been applied.
110 REGISTER MAP Copyright © 2009–2012, Texas Instruments Incorporated
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