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
2.7.6. UART Interface
There are two UART interfaces on M18QF/M18QA Series: One is a 4 bit UART(UART1) for
high-speed data transfer, max baud rate can be up to 4Mbps. Another is a 2 bit UART(UART2)
for diagnostic tools and debugging, the default baud rate 115200bps is recommended.
Figure 15. UART connection (example)
2.7.7. ADC Interface
An Analog to Digital Converter (ADC) input is provided by the M18QF/M18QA Series. The
converter is 16 bit resolution, ranging from 0.1 V to 1.7 V, with a sampling rate of 2.4 MHz.
Layout suggestion:
ADC signal trace should be well protected by GND plane
ADC signal trace should be protected from noise and other radiating signals