Uart Interfaces - Quectel BC950N-N1 Hardware Design

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NOTES
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
Main UART Port
Debug UART Port
Auxiliary UART Port
Bluetooth UART Port*
Ring Indication Signal
BC950N-N1_Hardware_Design
Pin Name Pin No.
RXD 29
TXD 30
RXD_DBG 19
TXD_DBG 20
RXD_AUX 55
TXD_AUX 56
CTS_AUX 57
RTS_AUX 58
RXD_BT* 6
TXD_BT* 5
RI 34
BC950N-N1 Hardware Design
Description
Receive data from TXD of DTE
Send data to RXD of DTE
Receive data from TXD of DTE
Send data to RXD of DTE
Receive data from TXD of DTE
Send data to RXD of DTE
Clear to send
Request to send
Receive data from TXD of DTE
Send data to RXD of DTE
Ring indication signal (when there is
an SMS or URC output, the module
will inform DTE with the RI pin)
LPWA Module Series
Comment
3.0V power
domain
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