mirror of
https://github.com/tillitis/tillitis-key1.git
synced 2024-09-07 01:52:49 +00:00
95 lines
3.0 KiB
Markdown
95 lines
3.0 KiB
Markdown
# Tillitis PCB designs
|
|
|
|
## Introduction
|
|
|
|
Tillitis develop boards (PCBs) and enclposures for the TKey devices as
|
|
well support systems such as FPGA programmers. Tillitis use open source
|
|
tools for the 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 |
|
|
|
|
### TKey 1 (TK1)
|
|
|
|
![](../../doc/images/mta1-usb-v1.jpg)
|
|
|
|
This is the first production version of the TKey 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
|
|
|
|
![](../../doc/images/mta1-usb-v1-programmer.jpg)
|
|
|
|
This is a programming jig for TKey 1 (the mta1-usb-v1) board The progamming board is based
|
|
around a on a Raspberry Pi Pico running a custom firmware developed by Blinkinlabs.
|
|
|
|
The source code for this firnware [is available on Github](https://github.com/Blinkinlabs/ice40_flasher).
|
|
There is also a [pre built firmware binary available for the programmer board](https://github.com/Blinkinlabs/ice40_flasher/tree/main/bin)
|
|
|
|
|
|
### mta1-usb-dev
|
|
|
|
![](../../doc/images/mta1-usb-dev.jpg)
|
|
|
|
This is the original TKey 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](https://github.com/ncarandini/KiCad-RP-Pico) project. It is licensed under
|
|
the [Creative Commons CC-BY-SA 4.0 License](https://creativecommons.org/licenses/by-sa/4.0/legalcode),
|
|
with an exception exempting waving any control of derived works.
|
|
|
|
|
|
---
|