Smart Module Series
SC200L_Series(Dual-band Wi-Fi)_Hardware_Design 41 / 111
The USB1 interface of the module supports OTG function. If you need this function, follow the design
below to add an external 5 V power supply, which can provide 500 mA current.
AW3605DNR
SW
VIN
22
μF
C2
10
μF
10K
1.0
μH
VBAT
C1
L1
R1
EN
A
G
N
D
VOUT
VOUT
NC
P
G
N
D
P
G
N
D
1
2
9
4
5
6
7
8
USB_VBUS
GPIO_87
3
Figure 12: Reference Design for USB1 Power Supply
The following table shows the pin definition of USB2.
Table 11: Pin Definition of USB2 Interface
HUB_USB_DP
USB_VBUS2
1
2
3
4
5
HUB_USB_DP
HUB_USB_DM
USB_ID
GND
G
N
D
G
N
D
G
N
D
G
N
D
6
7
8
9
100 nF
Module
C1
D1
D2
D3
ESD
ESD ESD
GND
HUB_USB_DM
USB_VBUS2
Figure 13: Reference Design for USB2 Interface
Pin Name
Pin No.
I/O
Description
Comment
HUB_USB_DP
173
AIO
USB differential data bus (+)
USB 2.0 standard compliant.
90
Ω differential impedance.
Supports USB host mode only and
supports USB hub.
HUB_USB_DM 174
AIO
USB differential data bus (-)