User's Manual
GSM/GPRS/GNSS Module Series
MC60 Hardware Design
MC60_Hardware_Design Confidential / Released 52 / 99
Figure 22: Reference Design for UART Port (Three Line Connection)
A reference design for UART Port with hardware flow control is shown as below. The connection will
enhance the reliability of the mass data communication.
Figure 23: Reference Design for UART Port with Hardware Flow Control
3.7.1.3. Firmware Upgrade
TXD and RXD can be used for firmware upgrade in both all-in-one solution and stand-alone solution. The
PWRKEY pin must be pulled down before firmware upgrade. A reference circuit is shown as below: