WM620 Hardware User Guide
V1.1
All rights reserved by Shenzhen Neoway Technology Co., Ltd.
1.3
Pin assignment and description
Pin
NO.
Pin Name
I/O
Pad
group
Description
COMMENT
GND
1
、
12
、
17
、
21
、
24
、
34
、
43
、
45
、
50
、
61
GND
PWR
Ground
NC
2
NC
Reserved
3
NC
Reserved
4
NC
Reserved
NC
5
NC
Reserved
6
NC
Reserved
7
NC
Reserved
8
NC
Reserved
NC
9
NC
Reserved
10
NC
Reserved
11
NC
Reserved
SIM card
interface
13
V_SIM
PWR
1.8V/2.8V
USIM VCC
14
SIM_RST
O
1.8V/2.8V
USIM reset
15
SIM_DAT
A
I/O
1.8V/2.8V
USIM data
Needs an external 10K
pull-up
resistance
to
V_SIM
16
SIM _CLK
I/O
1.8V/2.8V
USIM clock
USB
transceiver
interface
18
USB_D+
I/O
High-speed
USB
differential data (+)
19
USB_D-
I/O
High-speed
USB
differential data (-)
20
V_USB
PWR
USB Power input
Input range from 3.3 to
5.25 V.
Needs a 4.7uF decoupling
MLCC Cap to GND
Power
22
VBAT
PWR
Main battery power
input
23
Reset
25
RESET_N
DI
VDD_1.8V
Reset input
