Production Data
WM8750JL
Note:
When RINPUT3/HPDETECT is used as the HPDETECT input, the thresholds become CMOS levels
(0.3 AVDD / 0.7 AVDD).
HPSWEN HPSWPOL HPDETECT L/ROUT1 L/ROUT2 HEADPHONE
SPEAKER
ENABLED
(PIN23)
ENABLED
(REG. 26) (REG. 26)
0
0
0
0
1
1
1
1
1
1
1
1
X
X
X
X
0
0
0
0
1
1
1
1
X
X
X
X
0
0
1
1
0
0
1
1
0
0
1
1
X
X
0
1
0
1
X
X
0
1
0
1
0
1
X
X
X
X
0
1
no
no
no
yes
no
yes
yes
no
yes
no
no
yes
no
no
yes
no
no
no
yes
no
no
no
no
yes
Table 31 Headphone Switch Operation
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R24 (18h)
6
HPSWEN
0
0
Headphone Switch Enable
Additional
Control (2)
0 : Headphone switch disabled
1 : Headphone switch enabled
Headphone Switch Polarity
5
HPSWPOL
0 : HPDETECT high = headphone
1 : HPDETECT high = speaker
Table 32 Headphone Switch
Figure 11 Example Headset Detection Circuit Using Normally-Open Switch
Figure 12 Example Headset Detection Circuit Using Normally-Closed Switch
PD, April 2012, Rev 4.1
w
35
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
