CS4299 datasheet(25/52 Pages) CIRRUS

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CS4299

4.9

Input Mux Select Register (Index 1Ah)

SL[2:0]

Left Channel Source. The SL[2:0] bits select the left channel source to pass to the ADCs for

recording. See Table 6 for possible values.

SR[2:0]

Right Channel Source. The SR[2:0] bits select the right channel source to pass to the ADCs for

recording. See Table 6 for possible values.

Default

0000h. This value selects the Mic input for both channels.

4.10

Record Gain Register (Index 1Ch)

Mute

Record Gain Mute. Setting this bit mutes the input to the L/R ADCs.

GL[3:0]

Left ADC Gain. The GL[3:0] bits control the input gain on the left channel of the analog source,

applied after the input mux and before the ADCs. Each step corresponds to 1.5 dB gain adjust-

ment, with 0000 = 0 dB. The total range is 0 dB to +22.5 dB gain.

GR[3:0]

Right ADC Gain. The GR[3:0] bits control the input gain on the right channel of the analog

source, applied after the input mux and before the ADCs. Each step corresponds to 1.5 dB gain

adjustment, with 0000 = 0 dB. The total range is 0 dB to +22.5 dB gain.

Default

8000h. This value corresponds to 0 dB gain and Mute ‘set’.

D15

D14

D13

D12

D11

D10

SL2

SL1

SL0

SR2

SR1

SR0

Sx[2:0]

Record Source

000

Mic

001

CD Input

010

Video Input

011

Aux Input

100

Line Input

101

Stereo Mix

110

Mono Mix

111

Phone Input

Table 6. Input Mux Selection

D15

D14

D13

D12

D11

D10

Mute

GL3

GL2

GL1

GL0

GR3

GR2

GR1

GR0

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