3: Quick Start
GPS/GLONASS Receiver Module A5100-A User Guide
20
Figure 9: Self-start configuration A5100-A with Vbak
Remarks:
•
External antenna input impedance is 50
. Match as close as possible.
•
A battery back-up circuit for the RTC (Real Time Clock) should be consid-
ered (see chapter: “
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”)
•
For self-start mode, full power operation will be activated once Vcc applied.
No power save mode (PTF / MPM / TP) will be supported. Customer can
toggle the ON_OFF pin so as to put the module into hibernation and then re-
move the Vcc. A5100-A will be self-started again in full power mode when
Vcc applied.