Datasheet

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TSC2301

SLAS371D – SEPTEMBER 2002 – REVISED AUGUST 2004

Bits [13:12] — INML1-INML0

Left Audio ADC Input Multiplexer. These two bits select the analog input for the left channel ADC. The input to

the left channel ADC can come from the microphone input, right line input, left line input, or from a mono mix of

the left and right line inputs. The default input to the left channel ADC is the microphone input.

Table 32. Left Audio ADC Input Selection

INML[1:0]

INML1 INML0 Description

0 0 ADCL input = MIC (default)

0 1 ADCL input = LLINEIN

1 0 ADCL input = RLINEIN

1 1 ADCL input = (RLINEIN+LLINEIN)/2

Bits [11:10] — INMR1-INMR0

Right Audio ADC Input Multiplexer. These two bits select the analog input for the right channel ADC. The input to

the right channel ADC can come from the microphone input, right line input, left line input, or from a mono mix of

the left and right line inputs. The default input to the right channel ADC is the microphone input.

Table 33. Right Audio ADC Input Selection

INMR[1:0]

INMR1 INMR0 Description

0 0 ADCR input = MIC (default)

0 1 ADCR input = LLINEIN

1 0 ADCR input = RLINEIN

1 1 ADCR input = (RLINEIN+LLINEIN)/2

Bits [9:8] — MICG1-MICG0

Microphone Preamp Gain. These two bits select the gain of the microphone input channel. The gain of the

microphone input channel can be 0 dB, 6 dB, or 12 dB. The default gain of the microphone input channel is 0 dB.

Table 34. Microphone Input Gain Selection

MICG[1:0]

MICG1 MICG0 Description

0 0 MIC gain = 0 dB (default)

0 1 MIC gain = 0 dB

1 0 MIC gain = 6 dB

1 1 MIC gain = 12 dB