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CS47L35 Datasheet(PDF) 30 Page - Cirrus Logic

Part # CS47L35
Description  Smart Codec with Low-Power Audio DSP
PDF  300 Pages
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Manufacturer  CIRRUS [Cirrus Logic]
Direct Link  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

CS47L35 Datasheet(HTML) 30 Page - Cirrus Logic

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30
DS1085F3
CS47L35
4.2 Input Signal Path
Figure 4-2. Input Signal Paths
4.2.1
Analog Microphone Input
Up to six analog microphones can be connected to the CS47L35, either in single-ended or differential mode. The
applicable mode, and input pin selection, is controlled using INnx_SRC, as described in Section 4.2.6.
The CS47L35 includes external accessory-detection circuits that can report the presence of a microphone and the status
of a hook switch or other push buttons. When using this function, it is recommended to use the IN1BLP or IN1BRP analog
microphone input paths to ensure best immunity to electrical transients arising from the push buttons.
IN1L_PGA _VOL [6:0]
IN1L_SRC
00 = Differential IN1ALP – IN1ALN
01 = Single-ended IN1ALP (non-inverting)
10 = Differential IN1BLP – IN1BLN
11 = Single-ended IN1BLP (non-inverting)
IN1L_ENA
ADC
IN1ALN/DMICCLK1
IN1ALP
IN1L_DMIC_DLY
IN1R_DMIC_DLY
IN1 L_VOL
IN1 L_MUTE
IN1 R_VOL
IN1 R_MUTE
CLK
DAT
IN1L _HPF
IN1R_HPF
IN_HPF_CUT
IN1_MODE
IN1BLN
IN1BLP
IN1R_PGA_VOL
ADC
IN1R_ENA
IN1_OSR
IN1_DMIC_SUP
IN2L_PGA _VOL
IN2L_SRC
00 = Differential IN2LP – IN2LN
01 = Single-ended IN2LP ( non-inverting)
10 = Reserved
11 = Reserved
IN2L_ENA
ADC
IN2LN/DMICCLK2
IN2LP
IN2L_DMIC_DLY
IN2R_DMIC_DLY
IN2 L_VOL
IN2 L_MUTE
IN2 R_VOL
IN2 R_MUTE
CLK
DAT
IN2L _HPF
IN2R_HPF
IN2_MODE
IN2R_PGA_VOL
IN2R_SRC
00 = Differential IN2RP – IN2RN
01 = Single-ended IN2RP ( non-inverting)
10 = Reserved
11 = Reserved
ADC
IN2RN/DMICDAT2
IN2RP
IN2R_ENA
IN2_OSR
IN2_DMIC_SUP
IN_VD_RAMP
IN_VI_RAMP
IN1R_SRC
00 = Differential IN1ARP – IN1ARN
01 = Single-ended IN1ARP (non-inverting)
10 = Differential IN1BRP – IN1BRN
11 = Single-ended IN1BRP (non-inverting)
IN1ARN/DMICDAT1
IN1ARP
IN1BRN
IN1BRP
Digital Mic
Interface
Digital Mic
Interface



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