Changelist

There were some Tiliqua hardware released before the production R4 version. This page serves as a brief history of the differences between these versions, as well as any changes in post-production batches.

Tiliqua R4

First production hardware release.

  • SoldierCrab R3 FPGA SoM (LFE5U-25F, 1.8V 32MByte oSPIRAM)

  • Tiliqua R4 motherboard and front panel.

  • eurorack-pmod R3.3 audio interface.

R4 changes (compared to R3)

  • Add external PLL SI5351 and route 2x clocks to ECP5 (useful for EMC as it supports spread-spectrum, also for runtime clock/resolution switching).

  • Add series 27R/33R on all FFC lines to reduce radiated emissions.

  • Pinswaps to ensure external PLL is routed to true ECP5 clock input pins:

    • FFC_SDIN1: 44 -> 42

    • ENC_B: 40 -> 12

    • ENC_A: 42 -> 8

    • PLL_CLK1 -> 40 (removed: spare FPGA to RP2040 line)

    • PLL_CLK0 -> 44 (removed: spare FPGA to RP2040 line)

  • Route 4 new ex0/ex1 pins to RP2040 spare pins (shared with expansion connectors)

  • Swap RP2040 SPI flash for 128MBit part

  • Put spare RP2040 I2C pins on main tiliqua-mobo I2C bus.

  • Switch from 4L stackup to 6L stackup to improve SI/EMC.

Tiliqua R3

Another hardware revision that some beta testers have. Only 5 were produced.

  • SoldierCrab R3 FPGA SoM (LFE5U-25F, 1.8V 32MByte oSPIRAM)

  • Tiliqua R3 motherboard and front panel.

  • eurorack-pmod R3.3 audio interface.

R3 changes (compared to R2)

  • Pinswap all DVI pins to true ECP5 complementary pairs.

  • Swap all tantalums for ceramics, clean up PSU routing, swap LDO for TPS7A91, add choke input capacitors

  • Delete unused LEDs (MIDI bottom-side)

  • Fix EDID +5V I2C bridge schematic and enable.

  • Adjust fuses: +12V ingress 200mA->350mA fuse, GPDI +5V NONE->50mA fuse (so USB host doesn’t pop the fuse!)

  • Move encoder footprint 0.4mm in, midi 0.1mm out for 0.5mm shim washer on encoder

  • Pinswap ex0 / ex1 / ffc connectors for improved routing and SI.

  • Update LED current limiting resistors s/120R/220R

  • Swap rp2040 xtal to ABM8/15pF/1K (improve yield)

  • New M2.5 standoff footprint

  • Move 12V ingress connector in 1.5mm so we can better fit in skiffs.

  • Switch from 1.6mm to 1.2mm PCBA stackup for mechanical reasons (and improve usb2 connector yield)

  • (panel) fix DVI connector cutout

  • Add 2x spare pins for RP2040/ECP5 I2C (no pullups)

  • Layerswap In1 / In2 (move GND closer to SMPS)

  • Add flip-flop on CODEC PDN pin (allows for soft-mute when swapping bitstreams)

Tiliqua R2

This was the first hardware revision that some beta testers have. Only 5 were produced.

  • SoldierCrab R2 FPGA SoM (LFE5U-45F, 3.3V 16MByte HyperRAM)

  • Tiliqua R2 motherboard and front panel.

  • eurorack-pmod R3.3 audio interface.

Tiliqua R1

This prototype was shown at SuperBooth 2024. It was never shipped to anyone.

  • SoldierCrab R1 FPGA SoM (LFE5U-45F, 3.3V 16MByte HyperRAM, no USB2 PHY)

  • Tiliqua R1 motherboard and front panel.

  • eurorack-pmod R3.3 audio interface.