LPWA Module Series
BC950N-N1 Hardware Design
1. USB_MODE must be pulled down so as to realize USB download function.
2. When the USB interface is used for log capturing, the module will not be able to enter into Deep
Sleep mode.
3. When using USB function of the module, an external 3.3V power supply should be provided.
3.8. UART Interfaces
The module provides four UART ports: main UART port, debug UART port, auxiliary UART port and
Bluetooth UART port*. The module is designed as DCE (Data Communication Equipment), following the
traditional DCE-DTE (Data Terminal Equipment) connection.
Table 12: Pin Definition of UART Interfaces
Interface
Pin Name Pin No.
Description
Comment
Main UART Port
RXD
29
Receive data from TXD of DTE
3.0V power
domain
TXD
30
Send data to RXD of DTE
Debug UART Port
RXD_DBG
19
Receive data from TXD of DTE
TXD_DBG
20
Send data to RXD of DTE
Auxiliary UART Port
RXD_AUX
55
Receive data from TXD of DTE
TXD_AUX
56
Send data to RXD of DTE
CTS_AUX
57
Clear to send
RTS_AUX
58
Request to send
Bluetooth UART Port*
RXD_BT*
6
Receive data from TXD of DTE
TXD_BT*
5
Send data to RXD of DTE
Ring Indication Signal RI
34
Ring indication signal (when there is
an SMS or URC output, the module
will inform DTE with the RI pin)
NOTES
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