Product Info

5G Module Series
RM500Q-AE&RM502Q-AE Hardware Design
RM500Q-AE&RM502Q-AE_Hardware_Design 34 / 83
Please note that only USB 2.0 can be used for firmware upgrade currently.
The following table shows the pin definition of USB interface.
Table 10: Pin Definition of USB Interface
“*” means under development.
For more details about the USB 3.1 & 2.0 specifications, please visit http://www.usb.org/home.
The USB 2.0 interface is recommended to be reserved for firmware upgrade in designs. The following
figure shows a reference circuit of USB 3.1 & 2.0 interface.
Pin No.
Pin Name
I/O
Description
Comment
7
USB_DP
AI/AO
USB 2.0 differential data bus (+)
Require differential
impedance of 90 Ω
9
USB_DM
AI/AO
USB 2.0 differential data bus (-)
29
USB_SS_TX_M
AO
USB 3.1 transmit data (-)
31
USB_SS_TX_P
AO
USB 3.1 transmit data (+)
35
USB_SS_RX_M
AI
USB 3.1 receive data (-)
37
USB_SS_RX_P
AI
USB 3.1 receive data (+)
NOTE