This project is coming soon. Sign up to receive updates and be notified when this project launches.
ULX3S is a fully open source, compact, robust, and affordable FPGA dev board equipped with a balanced selection of additional components and expansions. Although it was designed primarily as a teaching tool for mastering the principles of digital circuit design, ULX3S incorporates a wide array of features and interfaces that allow it to serve as a broadly useful module for installation in complex devices.
Built around a powerful Lattice Semiconductor ECP5-series FPGA chip and supported by the latest open-source toolchains, ULX3S is one of the most powerful and desirable platforms available for FPGA enthusiasts. It comes equipped with onboard Wi-Fi, display, buttons, LEDs, and storage. Flash it with an over-the-air (OTA) update using the Wi-Fi connection or take advantage of the onboard OLED display and buttons to browse the contents of an SD card and select a bitstream. Due to its battery-backed RTC, ULX3S can power down completely and wake up only in response to certain events. This feature makes it perfect for use in low-power applications such as battery-powered remote sensor nodes.
And if you’re not the low-power type, onboard peripherals like SDRAM, USB, digital video out, onboard FM/ASK antenna, ADC, and DAC make it an audio/video powerhouse for signal processing and synthesis, motor control, and SDR use cases. It can emulate arcade machines and retro computers like the Minimig (Amiga) or modern systems like the F32C (MIPS/RISCV). It has 56 GPIO pins, all routed as differential pairs, and a PMOD compatible pinout, which opens it up to a wide range of expansion options. And if you are just starting out FPGAs, you can use the Arduino IDE to program ULX3S in seconds.
ULX3S has been actively developed since 2016 and is the result of a collaboration between Radiona.org / Zagreb Makerspace and FER – the Faculty of Electrical Engineering and Computing – at the University of Zagreb in Croatia.
PCB design was authored by Electronic Mechanic Aerodynamic Research & Development (EMARD).
|ULX3S||Lattice ECP5 Evaluation Board||Lattice ECP5 Versa||TinyFPGA EX||FleaFPGA 'Ohm'||KONDOR AX|
|Price Range||$60 – $200||$100||$250||not yet released||$45||$1500 – $2000?|
|Design Files Published?||Yes||No||No||Yes||No||No|
|Physical Dimensions||94 × 51 mm||180 × 100 mm||165 × 110 mm||61 × 18 mm||65 × 30 mm||180 × 130 mm|
|Model||ECP5 12F ECP5 25F ECP5 45F ECP5 85F||ECP5 85F||ECP5 45F||ECP5 12F ECP5 45F ECP5 85F||ECP5 25F||ECP5 85F|
|LUT Capacity||12 K – 84 K||84 K||44 K||12 K – 84 K||24 K||84 K|
|Embeded Memory (Kbits)||3744 (on 85F)||3744||1944||3744 (on 85F)||1008||3744|
|Programming Over...||USB-JTAG, EXT-JTAG, Wi-Fi-ESP32-JTAG, SD-ESP32-JTAG||USB-JTAG, EXT-JTAG||USB-JTAG, EXT-JTAG||USB-bootloader, EXT-JTAG||USB-JTAG, EXT-JTAG||USB-JTAG, EXT-JTAG|
|Direct USB to FPGA||Yes||No||No||Yes||Yes||No|
|PMOD Connector Placeholders||4||1||No||No||No||No|
|Onboard Clock||25 MHz||12 MHz 50 MHz 200 MHz||100 MHz||48 MHz 200MHz||25 MHz||100 MHz|
|Flash||32–128 Mbit QSPI||128 Mbit QSPI||128 Mbit QSPI||64 Mbit QSPI||8 Mbit SPI||64 Mbit QSPI|
|Onboard RAM||32 MB SDRAM||No||1024 MB DDR3||up to 16 MB HyperRAM||32 MB SDRAM||512 MB DDR3|
|Video Out||Digital (GPDI), Analog Composite PAL/NTSC (3.5 mm jack)||No||No||No||Digital (GPDI)||Digital (HDMI)|
|Audio Out||Digital S/PDIF (3.5 mm jack), Digital (GPDI), Analog stereo (3.5 mm jack)||No||No||No||Digital (GPDI)||Digital (HDMI)|
|Storage||Micro-SD||No||No||Micro-SD||Micro-SD||Micro-SD, 8 GB eMMC|
|Ethernet||Possible over: ESP32, GPDI, USB||No||Yes||No||No||Yes|
|Display||Placeholder for 0.96" SPI color OLED SSD1331||No||14-segment LED||No||No||No|
|Antenna||27, 88–108, 144, 433 MHz FM/ASK onboard||No||No||No||No||No|
|RTC (Real-time Clock)||MCP7940N, Low Power Sleep, Wakeup||No||No||No||No||No|
|Power Input||USB 5 V||12 V||12 V||USB 5 V||USB 5 V||12 V|
|GPIO Bank Voltage Levels||3.3 V, 2.5 V (jumper selectable)||3.3 V||3.3 V||3.3 V||3.3 V||3.3 V|
|Power Reserve to Drive External Circuits||3.3 V / 1 A, 2.5 V / 1.5 A||?||?||?||?||?|
|SERDES||0||9||1||0, 2 (only EX85-5G variant)||0||4|
|Open Source Toolchain||Yes||Yes||Yes||Yes||Yes||Yes|
|Arduino Support (FPGArduino)||Yes||Not yet||Not yet||Not yet||Yes||Yes|
|Confirmed Working Retro Games Consoles||Yes||No||No||No||Yes||No|