The Tang Mega 138K Pro Dock is Sipeed’s new RISC-V FPGA Development Board

The Tang Mega 138K Pro Dock is Sipeed’s new RISC-V FPGA Development Board

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Sipeed recently launched the Mega 138K Pro dev board. It’s built around the GOWIN GW5AST RISC-V FPGA and features 2x SFP+ ports, a GbE port, dual DVI interfaces, 8x 12.5Gbps Serdes, and other peripherals.

The Sipeed Tang series of boards are a family of FPGA development boards powered by Gowin FPGAs. The great thing about this board is they are easy to use and affordable, making them a good choice for beginners and experienced FPGA users alike. The Tang series of dev boards offer a variety of features. With the introduction of Tang Mega 138K Pro, we’re presented with a board that balances performance and power.

The board is powered by the GOWIN GW5AST-LV138FPG676A processor that features:

  • Core & Processing:
    • RISC-V AE350_SOC Hard core processor
    • 138K Logic units (LUT4)
    • 138K Registers (FF)
    • 298 Multipliers (18×18)
    • 12x Phase-Locked Loops (PLLs)
    • 16x Global clocks

The device supports dual 4K DVI output, a mic array for audio input, and a 3.5mm jack for audio out. Additionally, it supports high-speed networking with its dual SFP+ ports and a Gigabit Ethernet port. It also features a PCIe 3.0 x4 interface for additional connectivity.

The board also features three PMOD interfaces and two ADCs, and there is also two M.2 slot on the bottom of the board for additional expansion. The wiki page indicates that the M.2 slots are “reserved” so users might have to write the drivers themselves.

For more detailed technical information, refer to the Wiki or check out Sipeed’s GitHub repository.

Specifications listed for the Tang Mega 138K Pro Dock include:

  • Memory & Storage Specs:
    • RAM: 1GB (Comprised of two 512MB DDR3 modules)
    • Flash Storage: Dual 128Mbit units (Totaling 256Mbits)
    • Slot: Single MicroSD provision
  • Display & Sound Elements:
    • DVI Channels: Transmit (TX) and Receive (RX)
    • Audio: Standard 3.5mm port; Equipped with microphone setup
  • Camera Interface:
    • Ports: Dual MIPI CSI for imaging
  • Communication:
    • Ethernet: Single GbE interface
    • Advanced Ports: Dual SFP+ channels
  • Expandability Options:
    • PCIe Capability: Version 3.0, quad-lane (x4)
    • Provision for M.2
  • Input/Output Attributes:
    • Header: 40 pins (3.3V standard)
    • Connectors: Trio of PMOD slots
    • User Interface: Combination of 6 LEDs and 4 tactile buttons
  • Misc Features:
    • USB Interface: Dual ports, Type-C
    • Miscellaneous: Fan connector (5V) and an 8-pin module for JTAG + UART
  • Power Requirement:
    • Input: 12V DC
  • Physical Dimensions:
    • Size: 50mm x 70mm; Comes with an edge connector

The full development kit, including jump wires and various accessories, is priced at $195.00 on AliExpress.

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About Debashis Das

Tech Content Creator | Hardware Design Engineer | IoT Enthusiast | Digital Storyteller | Video Creator | From crafting digital dialogues at Semicon Media to orchestrating online engagement at Electronics-lab.com, my journey is about making tech talk interesting and accessible. In the quiet corners of the day, I advocate for easier tech education, one tutorial at a time. Let's connect and keep the digital dialogue going!

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