SEPTENTRIO mosaic Series, Руководство по оборудованию

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8
8
mosaic GNSS Module
8
3 mosaic GNSS Module
3.1 Overview
Septentrio ’s mosaic modules are low-power multi-band multi-constellation GNSS receiver
packaged in a 31x31mm LGA module. The internal block diagram is shown below.
The module operates from a single 3V3 power supply (VDD_3V3).
The ANT_1 input pad receives the RF signal from the main antenna. On dual-antenna
modules (mosaic-H), a second antenna input is available (ANT_2) for the auxiliary antenna.
A 3V to 5.5V DC voltage can be applied to the main antenna from the VANT pin, obviating
the need for an external antenna supply. The internal bias control circuit detects
overcurrent conditions (>150mA) and protects the module in case of short circuit. See
section 4.2.
The module can use its internal TCXO as frequency reference, but also accepts an external
frequency reference on the REF_I pin (mosaic-T only). See section 4.7.
Two event timer pins and a PPS output are available (1.8V LVTTL). See section 4.8.
The module features a rich set of communication interfaces:
•
Four serial ports (3.3V LVTTL), three of them with hardware flow control. See
section 4.3.
•
USB. See section 4.4.