User's Manual

M10 Hardware Design
M10_HD_V3.0 - 43 -
reliability of the mass data communication.
Figure 20: Connection of UART port with hardware flow control
3.8.1.3. Software upgrade
The TXD and RXD can be used to upgrade software. The PWRKEY pin must be pulled down
before the software upgrade. Please refer to the following figure for software upgrade.
IO Connector
TXD
RXD
GND
PWRKEY
Module (DCE)
UART port
TXD
RXD
GND
PWRKEY
Figure 21: Connection of software upgrade
3.8.2. Debug Port
Debug Port:
 Two lines: DBG_TXD and DBG_RXD
 It outputs log information automatically.
 Debug Port is only used for software debugging and its baud rate must be configured as