User's Manual

GSM/GPRS/GNSS Module Series
MC20 Hardware Design
MC20_Hardware_Design Confidential / Released 49 / 95
3.6.2. Debug Port
 Two lines: DBG_TXD and DBG_RXD.
 The port outputs log information automatically.
 Debug Port is only used for firmware debugging and its baud rate must be configured as 460800bps.
Figure 20: Reference Design for Debug Port
3.6.3. Auxiliary UART Port and GNSS UART Port
3.6.3.1. Connection in All-in-one Solution
In all-in-one solution, the Auxiliary UART Port and GNSS UART Port should be connected together, thus
allowing for communication between GSM and GNSS parts. A reference design is shown below.