Smart Module Series
SC606T Series Hardware Design
SC606T_Series_Hardware_Design 44 / 116
USB_ID and GPIO_1 pins. When an OTG is connected to the USB Type-C interface, the USBC_CC1 and
USBC_CC2 will force the USB_ID to output a low voltage level to pull down GPIO_1, thus making the
module enter Host mode. If USB OTG is not used, the USB_ID should be kept open.
In the design of the USB 2.0 interface, it is recommended to connect the module
’s GPIO_1 directly to the
USB_ID of external micro USB interface for USB ID detection. If the external micro USB interface serves
as a host, the module
’s GPIO_1 will be pulled down to force the module into Host mode. The following
figure is a reference design for the USB 2.0 interface:
USB_DP
USB_DM
USB_VBUS
1
2
3
4
5
USB_DP
USB_DM
VBUS
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
GPIO_1
1.0
μ
H
L1
AW3605DNR
SW
VIN
EN
4
5
1
VOUT
VOUT
7
8
NC
6
C2
22
μ
F
C3
10
μ
F
R1
10K
VPH_PWR
GPIO_97
A
G
N
D
P
G
N
D
P
G
N
D
2
3
9
Figure 11: USB 2.0 Interface Reference Design
For the reference design of the USB 3.0 interface, see document [5].