Smart Module Series
SC200K_Series_Hardware_Design 42 / 105
4
Application Interfaces
4.1. USB Interfaces
The module provides two USB interfaces.
USB1 interface:
⚫
Compliant with USB 2.0 specification, with transmission rate up to 480 Mbps
⚫
Supports USB OTG, Type-C
⚫
Supports host and device modes
⚫
USB hub expansion is not supported
⚫
Used for AT command communication, data transmission, software debugging and firmware upgrade
USB2 interface:
⚫
Compliant with USB 2.0 specification, with transmission rate up to 100 Mbps
⚫
Supports host mode only
⚫
Supports USB hub expansion
Table 10: Pin Definition of USB Interfaces
Pin Name
Pin No.
I/O
Description
Comment
USB_VBUS
141, 142
PI
Charging power input. USB
insertion detect.
Used for USB 5 V power
input.
USB1_DM
13
AIO
USB1 2.0 differential data (-)
USB 2.0 compliant.
Require differential
impedance of 90 Ω.
Supports host and device
modes. External USB hub
expansion is not
supported.
USB1_DP
14
AIO
USB1 2.0 differential data (+)
USB2_DM
174
AIO
USB2 2.0 differential data (-)
USB 2.0 compliant.
Require differential
impedance of 90 Ω.
Supports host mode only.
External USB hub
USB2_DP
173
AIO
USB2 2.0 differential data (+)