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KiCad-RP Pico | ||
mta1-library | ||
mta1-usb-dev | ||
mta1-usb-v1 | ||
mta1-usb-v1-programmer | ||
README.md |
MTA1-USB PCB designs
Boards
The KiCad board projects all follow this directory structure:
Path | Description |
---|---|
/project | KiCad 6 project |
/project/gerbers | PCB release files |
/project/test | Scripts / gateware used for production tests |
mta1-usb-v1
This is the first production version of the MTA1-USB design.
Main features:
- Miniaturized hardware the size of a small USB stick.
- The Interface FPGA from the MTA1-USB-DEV design has been replaced with an Interface MCU running a USB-to-Serial converter firmware. This was done to ease development of the FPGA design.
- A touch sensor IC is provided instead of the switch for user presence detection.
- Test pads are provided on the bottom of the board for programming the SPI flash, and also for measuring extra GPIO pins. The 'MTA1-USB-V1-Programmer' board is designed to support this.
mta1-usb-v1-programmer
This is a programming jig for the mta1-usb-v1 board.
mta1-usb-dev
This is the original design, intended as a development platform. It is a larger PCB, that connects to a PC via a USB C cable.
Main features:
- 2 ICE40 FPGAs.
- The first ICE40 (Interface FPGA) is connected to a USB C plug, and is loaded with a gateware that contains a soft USB device. This gateware acts as an USB-to-GPIO interface to the second ICE40.
- The second ICE40 (application FPGA) is loaded with a RISC-V soft core containing the security firmware. User applications are run on this gateware.
- The second ICE40 also has an input button for user presenence detection.
- An FTDI module is included for programming both the Application and Interface FPGAs.
- Both ICE40s can be configured to boot from included SPI flash memories, NVCM, or be live programmed from the FTDI module.
- All GPIO lines between the two FPGAs, as well as all programming signals, are exposed on 0.1" headers for probing.
Libraries
mta1-library
This is a shared KiCad library for all boards in the project.
KiCad-RP Pico
This is a KiCad library for the Raspberry Pi Pico symbol and footprint. It was extracted from the Kicad-RP-Pico project. It is licensed under the Creative Commons CC-BY-SA 4.0 License, with an exception exempting waving any control of derived works.