User's Manual

Page 11
BitaTek Co., Ltd. Copyright protected. All rights reserved.
NO. 115 Wugong 3rd Rd., Tel [phone]
Wugu Dist., New Taipei City 248, Taiwan (R.O.C.) Fax[phone]
V17
PA_THERM
AI
AMUX input – PA
thermistor divider
V19
PMI8952_USB_EN
DO
Enable USB path from
external power multiplexer
Y18
PMI8952_USB_SNS
AI
USB input voltage sense
pin from external power
multiplexer
V18
PMI8952_DC_EN
DO
Enable 2nd power path
from external power
multiplexer
Y19
PMI8952_DC_SNS
AI
2nd power voltage sense to
determine in or out of valid
range
Z16
NC
NC
Keep it floating and doesn't
connect to GND.
Audio
H18
MIC_BIAS1
AO
Microphone bias #1
I18
MIC_BIAS2
AO
Microphone bias #2
H19
MIC1_IN_M
AI
Microphone input 1, minus
H20
MIC1_IN_P
AI
Microphone input 1, plus
M19
MIC2_IN
AI
Microphone input 2
L18
MIC3_IN
AI
Microphone input 3
K18
GND_CFILT
GND
Microphone bias filter
ground
J19
HPH_L
AO
Headphone output, left
channel
J20
HPH_R
AO
Headphone output, right
channel
K20
HPH_REF
AI
Headphone ground
reference
N18
HS_DET
AI
Headset detection
L20
EARO_M
AO
Earpiece output, minus (-)
L19
EARO_P
AO
Earpiece output, plus (+)
N20
SPKR_DRV_M
AO
Class-D speaker driver
output, minus (-)
N19
SPKR_DRV_P
AO
Class-D speaker driver