AK4671_10 Datasheet, PDF (111/166 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/RCV/HP-AMP

[AK4671]
■ General Purpose Output
AK4671 supports General Purpose Output Pin (GPO) to control the external component.
In the case of GPOM1 bit = “0”, GPO1 pin goes to “H” at GPOE1 bit = “1”.
GPOE1 bit
GPO1 pin
0
L
(default)
1
H
Table 90. General Purpose Output 1 Pin Control (at GPOM1 bit = “0”)
In the case of GPOM1 bit = “1”, GPO1 pin goes to “H” if the input level of the channel selected by A0 bit (SAIN1 or
SAIN2 pin) is higher than the reference voltage that is input to the SAIN3 pin. In the case of GPOM1 bit = “1”, the
reference voltage input to SAIN3 pin should be lower than 0.5 x SAVDD.
SAIN1/2 pin
GPO1 pin
< SAIN3 pin
L
(default)
≥ SAIN3 pin
H
Table 91. General Purpose Output 1 Pin Control (at GPOM1 bit = “1”)
In the case of GPOM2 bit = “0”, GPO2 pin goes to “H” at GPOE2 bit = “0”.
GPOE2 bit
GPO2 pin
0
L
(default)
1
H
Table 92. General Purpose Output 2 Pin Control (at GPOM2 bit = “0”)
In the case of GPOM2 bit = “1”, GPO2 pin outputs the mic detection result. (Table 21)
Input Level of MDT pin
≥ 0.075 x AVDD
< 0.050 x AVDD
GPO2 pin
DTMIC bit
H
1
L
0
Table 21. Microphone Detection Result
Result
Mic (Headset)
No Mic (Headphone)
MS0666-E-02
- 111 -
2010/06