User Manual

GSM/GPRS Module Series
GC10 Hardware Design
GC10_Hardware_Design Confidential / Released 38 / 76
Three-line connection is shown as below:
Figure 20: Reference Design for UART Port
UART port with hardware flow control is shown as below. This connection will enhance the reliability of the
mass data communication.
Figure 21: Reference Design for UART Port with Hardware Flow Control
3.7.2. Debug and Upgrade Port
Debug port:
 Two lines: DBG_TXD and DBG_RXD
 Debug port is used for firmware debugging and upgrading, its baud rate must be configured as
921600bps.