Rainbow Electronics AT73C246 - Manual (Page 98)

98
11050A–PMAAC–07-Apr-10
AT73C246
Name: MIC_CONTROL
Access: Read / Write
Address: 0x12
7 6 5 4 3 2 1 0
- - MICLDIFF MICRDIFF MICDET ONMICBIAS MICDET_ST
Table 13-28. MIC_CONTROL (0x12) Structure
Bit Name Description Reset value
7:6 - unused 00
5 MICLDIFF
Left microphone differential configuration
0: Single-ended
1: Differential
0
4 MICRDIFF
Right microphone differential configuration
0: Single-ended
1: Differential
0
3:2 MICDET Microphone detector threshold 00
1 ONMICBIAS
Microphone bias generator ON / OFF
0: OFF
1: ON
0
0 MICDET_ST
MICBIAS pin microphone detector status bit
0: No microphone detected
1: Microphone detected
0
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