Uart Interface - Quectel UC20 Manual

Large
Capacitance
Capacitor

3.10. UART Interface

The module provides two UART interfaces: main UART interface and debug UART interface. The
following shows the different features.
 Main UART interface supports 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600bps
baud rate, the default is 115200bps, while autobauding is not supported. This interface can be used
for data transmission, AT communication or firmware upgrade.
 Debug UART interface supports 115200bps. It can be used for GNSS NMEA sentences output.
NOTE
USB interface supports software debug and firmware upgrade by default.
The module is designed as the DCE (Data Communication Equipment), following the traditional
DCE-DTE (Data Terminal Equipment) connection. The following tables show the pin definition of these
two UART interfaces.
Table 9: Pin Definition of the Main UART Interface
Pin Name Pin No.
RI 62
DCD 63
CTS 64
RTS 65
UC20_Hardware_Design
VRTC
Figure 17: RTC Supply from Capacitor
I/O Description
DO Ring indicator.
DO Data carrier detection.
DO Clear to send.
DI Request to send.
Confidential / Released
UMTS/HSPA Module Series
UC20 Hardware Design
R
RTC
Core
Module
Comment
1.8V power domain.
1.8V power domain.
1.8V power domain.
1.8V power domain.
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