User's Manual
Table Of Contents
- Introduction
- Abbreviation
- Features
- Electrical Specifications
- Host interface pin assignments
- LGA Pad Diagram
- Pin Assignments
- Power supply
- USB interface
- SGMII interface
- UIM interface
- Control interface
- Power-on Signal
- Wake-up interface
- Reset Signal
- WWAN state Signal
- Digital interface
- JTAG Interface
- SPI Master Interface
- PCM Interface
- I2S Interface
- I2C Interface
- UART Interface
- ADC Interface
- RF Specifications
- RF connections
- Interference and sensitivity
- GNSS external circuit design
- RF Specification
- 3.5.1 Band support
- 3.5.2 Bandwidth support
- 3.5.3 RF Transmit Specification
- 3.5.4 RF Receiver Specification
- 3.5.5 GNSS Receiver Specification
- Power
- Power consumption
- Software Interface
- Support tools
- USB interface
- Mechanical and Environmental Certifications
- PCBA Form Factor
- Reflow
- PCB pad design
- Labeling
- SMT Voids control
- Mother board PCB thickness
- Stencil design
- Thermal considerations
- Regulatory Compliance and Certification
- Certification testing
- Packaging
- Tape-and-Reel Package
- Single Packaging for Samples
- MSL level
- Safety Recommendation
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HW Design Guidelines
away from high-speed switching signals. Furthermore, the trace from the
module to the antenna should be as short as possible and must be
shielded by complete grounding.
– The M18QF/M18QA Series modules are well shielded; the high-speed
elements (Ex.: DDR memory, LCD modules, DC-DC converter, PCM signal)
on a system should have shielding reserved during the early stages of
development.
trace impedance for connection external shall be 50 ohms.
trace should be kept as short as possible and avoid possible nearby unwanted signal
pick up and transmitted by the antenna.
System integrator should verify if unwanted radiated signal still complies with the
relevant rule(s) requirements.
Caution: DDR bus, LCD bus, DC-DC switching and PCM signals are
easily to influence the WWAN and GNSS receiver performance, these
signals must to be routed in the inner layer of the PCB and far away
from the WWAN and GNSS receiver path.
3.3. GNSS external circuit design
One Notch filter, GNSS SAW filter, LNA, and another GNSS SAW filter need to be used
between the module and antenna. Detail design guide as below.
in129 GPIO05Pin129 GPI