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
Signal lengths on the modules are tuned as below:
Function
Net
Length (mil)
SGMII
SGMII_TX_P
617.11
SGMII_TX_M
642.13
SGMII_RX_P_C+SGMII_RX_P
661.40
SGMII_RX_M_C+SGMII_RX_M
675.06
2.5. UIM interface
M18QF/M18QA Series modules provide an UIM_DETECT input pin for UIM connector to
detect UIM card. When UIM card is present, UIM_DETECT should be high (1.8V). If UIM card
is absent, UIM_DETECT should be low. It’s required to pull UIM_DETECT to VREF with a 470k
resistor.
A 0.1μF and a 33pF capacitor are recommended to place between UIM_VCC and Ground in
parallel. A 33pF capacitor is recommended to place between UIM_RESET, UIM_CLK and
UIM_DATA and Ground in parallel, see Figure5 for reference.
Electrostatic discharge (ESD) protection circuit is also recommended to place near the UIM
socket as close as possible, and the Ground pin of the ESD protection component must be
well connected to the Ground plane.
The following figure shows an example of UIM card circuit.