AK4951AEN Datasheet, PDF (36/105 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/HP/SPK-AMP

[AK4951A]
■ ADC Mono/Stereo Mode
PMADL, PMADR, PMDML and PMDMR bits set mono/stereo ADC operation. When changing ADC
operation and analog/digital microphone, PMADL, PMADR, PMDML and PMDMR bits must be set “0” at
first. When DMIC bit = “1”, PMADL and PMADR bit settings are ignored. When DMIC bit = “0”, PMDML
and PMDMR bit settings are ignored.
Table 20. Mono/Stereo ADC operation (Analog Microphone)
PMADL bit
PMADR bit
ADC Lch data
ADC Rch data
0
0
All “0”
All “0”
0
1
Rch Input Signal Rch Input Signal
1
0
Lch Input Signal Lch Input Signal
1
1
Lch Input Signal Rch Input Signal
(default)
Table 21. Mono/Stereo ADC operation (Digital Microphone)
PMDML bit
PMDMR bit
ADC Lch data
ADC Rch data
0
0
All “0”
All “0”
0
1
Rch Input Signal Rch Input Signal
1
0
Lch Input Signal Lch Input Signal
1
1
Lch Input Signal Rch Input Signal
(default)
■ MIC/LINE Input Selector
The AK4951A has an input selector. INL1-0 and INR1-0 bits select LIN1/LIN2/LIN3 and RIN1/RIN2/RIN3,
respectively. When DMIC bit = “1”, digital microphone input is selected regardless of INL1-0 and INR1-0
bits. RIN3 pin is shared with BEEP pin. When PMBP bit = “0”, RIN3 pin can be selected.
Table 22. MIC/Line In Path Select
DMIC bit INL1 bit INL0 bit INR1 bit INR0 bit
Lch
Rch
0
0
0
0
LIN1
RIN1
0
0
0
1
LIN1
RIN2
0
0
1
0
LIN1
RIN3
0
1
0
0
LIN2
RIN1
0
0
1
0
1
LIN2
RIN2
0
1
1
0
LIN2
RIN3
1
0
0
0
LIN3
RIN1
1
0
0
1
LIN3
RIN2
1
0
1
0
LIN3
RIN3
Others
N/A
N/A
1
x
x
x
x
Digital Microphone
(x: Do not care, N/A: Not available)
(default)
016001936-E-00
- 36 -
2016/03