WM620 Hardware User Guide
V1.1
All rights reserved by Shenzhen Neoway Technology Co., Ltd.
Page 1
Power
26
VDD_1.8V
PWR
Linear
regulator
1.8V output
27
VDD_2.6V
PWR
Linear
regulator
2.6V output
Audio
interface
28
EAR_1P
AO
Earphone amplifier
output
（
+
）
29
EAR_1N
AO
Earphone amplifier
output
（
-
）
30
MIC_1N
AI
Microphone
difference input1 (-)
31
MIC_1P
AI
Microphone
difference input (+)
NC
32
NC
Reserved
33
NC
35
NC
36
NC
37
NC
38
NC
39
NC
40
NC
41
NC
42
NC
ANT
44
ANT_M
AI/A
RF main antenna
interface
46
ON_OFF
I
Control
power-on
and power-off
Pulled up internally
with
a
250k
to
DVDD;
approx2.8 V
Indicator
Light
47
VRTC
PWR
Coin cell backup
voltage input
Range
1.5~3.25VDC,Typical
3.0VDC
48
SIG_LED
O
VDD_2.6V
Signal show
LIGHT
ADC
49
ADC
AI
12bit ADC input
Input Range
：
0~2.2V
51
RING
O
VDD_2.6V
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