LimeNET-Micro

The LimeNET Micro makes deploying wireless networks more accessible than ever before, by extending the LimeNET line of integrated hardware solutions via an ultra-low cost platform that is capable of supporting narrowband systems, such as GSM and IoT wireless standards, in a stand-alone configuration.

• RF transceiver: Lime Microsystems LMS7002M
• FPGA Features
  • Intel Altera MAX 10 (10M16SAU169C8G)
  • 169-pin FBGA package
  • 16K LEs
  • 549 KB M9K memory
  • 2,368 KB user flash memory
  • 4 x fractional phase locked loops (PLLs)
  • 45 x 18x18-bit multipliers
  • 130 x general purpose input/output (GPIO)
  • Single supply voltage
  • Flash feature
  • FPGA configuration via JTAG
• GNSS module: u-blox NEO-M8Q-0-10
  • Supports BeiDou, Galileo, GLONASS, GPS / QZSS
  • Able to concurrently receive up to three GNSS
  • –167 dBm navigation sensitivity
• EEPROM memory: 2 x 128 KB for RF transceiver MCU firmware and data
• Flash memory: 1 x 4 MB flash memory for data
• General user inputs/outputs:
  • 5 x dual color (red + green) LED
  • 8 x FPGA GPIO pinheader (3.3 V)
  • 4 x FPGA switches
  • 1 x buzzer
• Connectivity:
  • 2 x coaxial RF (SMA) connectors (each can be switched between high and low frequency bands)
  • SMA connector for external clock source in
  • SMA connector for clock source out
  • SMA connector for GNSS antenna
  • Raspberry Pi Touch Screen Display Connector (ribbon cable)
  • Raspberry Pi Camera (ribbon cable)
  • HDMI connector
  • 2 x USB 2.0 ports
  • 3.5 mm audio out (Raspberry Pi Compute Module)
  • FPGA GPIO headers
  • FPGA JTAG connector
  • RJ45 connector for Ethernet and IEEE 802.3 active Power-over-Ethernet (PoE)
  • DDR2 SODIMM connector - only usable for Raspberry Pi Compute Module 3 (or Lite)
  • MicroSD slot for RPi Compute Module storage
  • Barrel connector for 5 V DC power
  • Micro-USB for USB boot of Compute Module
• Clock system:
  • 30.72 MHz OCXO: Rakon U7475LF
  • GPS disciplined for high frequency accuracy and stability
  • External clock input via SMA connector
  • Clock output via SMA connector
• Board dimensions: 125 mm x 65 mm

Contents

The directory structure is as follows:

  hardware/<version>/
      Libraries/             - Component Libraries
      OutputJobs/            - Output jobs
      PCB/                   - PCB design
      Project Outputs/       - BOM, rule check reports, Gerbers, pick & place files, PDFs
      Schematics/            - Schematic diagrams

Licensing

The hardware designs are licensed under a Creative Commons Attribution 3.0 Unported licence.