Smart Machine Smart Decision
Figure 16: Level matching circuit
4.4.3
USB Interface
SIM2000S could achieve software debug function through USB interface. When powering on the module,
connecting VBUS, USB_DP, USB_DM, and GND to PC, then installing the driver following the prompts, a USB
port could be recognized by PC, customer could achieve the software Debug with USB port.
SIMCom
recommendeds the following connection figure:
SIM2000S_Hardware_Design_V1.00
27
2014-02-27
Figure 17: USB reference circuit
The TVS on USB data line should be less than 5pf, and traced by differential forms
Note: please reserve the USB interface or test point for further debugging
22R
USB_DM
MODULE
22R
USB_DP
VBUS
1uF
USB_DM
USB_DP
VBUS
GND
GND
USB
VBUS