Quectel MC60 Series User Manual

GSM/GPRS/GNSS Module Series
MC60 Series Hardware Design
MC60_Series_Hardware_Design Confidential / Released 60 / 114
Peripheral
TXD
RXD
GNSS_TXD
GNSS_RXD
RXD_AUX
TXD_AUX
S1
Module
Figure 29: Auxiliary and GNSS UART Port Connection in Stand-alone Solution
3.9.4. UART Application
A reference design of 3.3V level match is shown as below. If the host is a 3V system, please change the
5.6K resistors to 10K ones.
Peripheral
/TXD
/RXD
1K
TXD
RXD
RTS
CTS
DTR
RI
/RTS
/CTS
GPIO
EINT
GPIO DCD
Module
1K
1K
5.6K
5.6K
5.6K
1K
1K
1K
1K
GND GND
Voltage level: 3.3V
Figure 30: Level Match Design for 3.3V System
It is highly recommended to add the resistor divider circuit on the UART signal lines when the host’s level
is 3V or 3.3V. For a higher voltage level system, a level shifter IC could be used between the host and the
module. For more details about UART circuit design, please refer to document [13].
NOTE
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Quectel MC60 Series Specifications

General

Brand	Quectel
Model	MC60 Series
Category	Control Unit
Language	English