Smart Machine Smart Decision
4.7 USB interface
Figure 11: USB Interface
Table 8: USB interface
Pin
Signal
I/O
Description
1 VBUS
I
5V
2 USB_D+
I/O
D+ line
3 USB_D-
I/O
D- line
4 GND
Ground
4.8 Switch interface
Figure 12: Switch Interface
Table 9: The Description of the Switch status
S204 Status
Description
Off
The RS232 transceiver is closed.
On
The RS232 transceiver is open.
S301 Status
Description
Off
The RF circuit of SIM7100x is closed.
On
The RF circuit of SIM7100x is open.
SIM7100x EVB User Guide
2015-07-20
17
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