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Smart Module Series

SC606T Series Hardware Design

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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

6

7 8

9

100 nF

Module

C1

D1

D2 D3

ESD ESD ESD

GPIO_1

1.0 μH

L1

AW3605DNR

SW

VIN

EN

4

5

1

VOUT

7

8

NC

6

C2

22 μF

C3

10 μF

R1

10K

VPH_PWR

GPIO_97

AGND

PGND

2

3

9

Figure 11: USB 2.0 Interface Reference Design

For the reference design of the USB 3.0 interface, see document [5].