GSM/GPRS/GNSS Module Series
MC60 Series Hardware Design
MC60_Series_Hardware_Design Confidential / Released 32 / 114
DC_IN
C1
C2
U1
GNSS_VCC
100nF
C4
100nF100uF
GNSS_POWER_ON/OFF
47K
4.7K
R2
R3
XC6209F332MR
VIN
VOUT
Q1
CE
NC
GND
R1
10K
C3
4.7uF
Figure 10: Reference Circuit Design for GNSS part in Stand-alone Solution
3.5.4. Monitor Power Supply
The command AT+CBC can be used to monitor the supply voltage of the GSM part. The unit of the
displayed voltage is mV. For details, please refer to document [1].
3.5.5. Backup Domain of GNSS
The GNSS part of MC60 features a backup domain which contains all the necessary GNSS information
for quick start-up and a small amount of user configuration variables. In GNSS’s backup mode, the
backup domain is still alive. As long as the backup domain is alive, EASY technology will be available.
3.5.5.1. Use VBAT as the Backup Power Source of GNSS
In either All-in-one or Stand-alone solution, GNSS’s backup mode will be active as long as the main
power supply (VBAT) is remained, even when the module is turned off and GNSS_VCC is powered off; as
the GNSS’s backup domain is powered by VBAT. In this case, the VRTC pin can be kept floating, and the
current consumption is only about 220uA.
When powered by VBAT, the reference schematic diagrams in All-in-one and Stand-alone solutions are
shown below.
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