Quectel SC200L-EM Hardware Design page 31

Table 8: Pin Definition of USB Interface
Pin Name Pin No.
USB_VBUS 141、142
USB_DM 13
USB_DP 14
USB_ID 16
For USB 2.0 interface design, it is recommended that USB_ID should be directly connected to the
USB_ID pin of an external USB port for USB ID detection. When a device inserts an external USB port, if
it pulls down the USB_ID pin of the module, the module will enter the Host mode.
Figure 10: USB Interface Reference Design (OTG is not Supported)
SC200L_Hardware_Design
I/O Description
PI USB power supply
USB 2.0 differential data
AI/AO
bus (-)
USB differential data bus
AI/AO
(+)
USB ID detection of the
DI
input
SC200L Hardware Design
Comment
Vmax = 9.20 V
Vmin = 4.50 V
Vnorm = 5.00 V
USB 2.0 standard compliant.
90Ω differential impedance.
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