CS47L35 datasheet(43/300 Pages) CIRRUS

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DS1085F3

CS47L35

4.3 Digital Core

4.3.2

Digital-Core Inputs

The digital core comprises multiple input paths, as shown in Fig. 4-12. Any of these inputs may be selected as a source

to the digital mixers or signal-processing functions within the CS47L35 digital core.

Note that the outputs from other blocks within the digital core may also be selected as input to the digital mixers or

signal-processing functions within the CS47L35 digital core. Those input sources, which are not shown in Fig. 4-12, are

described separately throughout Section 4.3.

The hexadecimal numbers in Fig. 4-12 indicate the corresponding x_SRCn setting for selection of that signal as an input

to another digital-core function.

The sample rate for the input signal paths is configured by using the applicable IN_RATE, AIFn_RATE, or SLIMRXn_

RATE field; see Table 4-21. Note that sample-rate conversion is required when routing the input signal paths to any signal

chain that is configured for a different sample rate.

Table 4-7. Digital-Core Mixer Control Registers

Label

Default

Description

R1600 (0x0640)

R2936 (0x0B78)

x_STSn

Valid for every digital

core function input

(digital mixers, DSP aux

inputs, and ISRC

inputs).

[Digital Core function] input n status

0 = Disabled

1 = Enabled

7:1 x_VOLn

Valid for every digital

mixer input.

0x40 [Digital Core mixer] input n volume. (–32 dB to +16 dB in 1-dB steps)

0x00 to 0x20 = –32 dB

0x21 = –31 dB

0x22 = –30 dB

... (1-dB steps)

0x40 = 0 dB

... (1-dB steps)

0x50 = +16 dB

0x51 to 0x7F = +16 dB

7:0 x_SRCn

Valid for every digital

core function input

(digital mixers, DSP aux

inputs, and ISRC

inputs).

0x00 [Digital Core function] input n source select

0x00 = Silence (mute)

0x04 = Tone generator 1

0x05 = Tone generator 2

0x06 = Haptic generator

0x08 = AEC Loop-Back 1

0x09 = AEC Loop-Back 2

0x0D = Noise generator

0x10 = IN1L signal path

0x11 = IN1R signal path

0x12 = IN2L signal path

0x13 = IN2R signal path

0x20 = AIF1 RX1

0x21 = AIF1 RX2

0x22 = AIF1 RX3

0x23 = AIF1 RX4

0x24 = AIF1 RX5

0x25 = AIF1 RX6

0x28 = AIF2 RX1

0x29 = AIF2 RX2

0x30 = AIF3 RX1

0x31 = AIF3 RX2

0x38 = SLIMbus RX1

0x39 = SLIMbus RX2

0x3A = SLIMbus RX3

0x3B = SLIMbus RX4

0x3C = SLIMbus RX5

0x3D = SLIMbus RX6

0x50 = EQ1

0x51 = EQ2

0x52 = EQ3

0x53 = EQ4

0x58 = DRC1 Left

0x59 = DRC1 Right

0x5A = DRC2 Left

0x5B = DRC2 Right

0x60 = LHPF1

0x61 = LHPF2

0x62 = LHPF3

0x63 = LHPF4

0x68 = DSP1 Channel 1

0x69 = DSP1 Channel 2

0x6A = DSP1 Channel 3

0x6B = DSP1 Channel 4

0x6C = DSP1 Channel 5

0x6D = DSP1 Channel 6

0x70 = DSP2 Channel 1

0x71 = DSP2 Channel 2

0x72 = DSP2 Channel 3

0x73 = DSP2 Channel 4

0x74 = DSP2 Channel 5

0x75 = DSP2 Channel 6

0x78 = DSP3 Channel 1

0x79 = DSP3 Channel 2

0x7A = DSP3 Channel 3

0x7B = DSP3 Channel 4

0x7C = DSP3 Channel 5

0x7D = DSP3 Channel 6

0xA0 = ISRC1 INT1

0xA1 = ISRC1 INT2

0xA2 = ISRC1 INT3

0xA3 = ISRC1 INT4

0xA4 = ISRC1 DEC1

0xA5 = ISRC1 DEC2

0xA6 = ISRC1 DEC3

0xA7 = ISRC1 DEC4

0xA8 = ISRC2 INT1

0xA9 = ISRC2 INT2

0xAA = ISRC2 INT3

0xAB = ISRC2 INT4

0xAC = ISRC2 DEC1

0xAD = ISRC2 DEC2

0xAE = ISRC2 DEC3

0xAF = ISRC2 DEC4

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