Rainbow-electronics AT73C246 Manual do Utilizador descarregar pdf (Página 98)

11050A–PMAAC–07-Apr-10

AT73C246

Name: MIC_CONTROL

Access: Read / Write

Address: 0x12

76543210

- - MICLDIFF MICRDIFF MICDET ONMICBIAS MICDET_ST

Table 13-28. MIC_CONTROL (0x12) Structure

Bit Name Description Reset value

7:6 - unused 00

5MICLDIFF

Left microphone differential configuration

0: Single-ended

1: Differential

4 MICRDIFF

Right microphone differential configuration

0: Single-ended

1: Differential

3:2 MICDET Microphone detector threshold 00

1 ONMICBIAS

Microphone bias generator ON / OFF

0: OFF

1: ON

0MICDET_ST

MICBIAS pin microphone detector status bit

0: No microphone detected

1: Microphone detected

Table 13-29. Microphone Detector Threshold Selection Table

MICDET MICBIAS PIN LEVEL (V)

00 AVDD - 0.1

01 AVDD - 0.2

10 AVDD - 0.3

11 AVDD - 0.4

1 2 ... 93 94 95 96 97 98 99 100 101 102 103 ... 158 159

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