One of my latest projects is the Baochip-1x, a mostly-open, full-custom silicon chip fabricated in TSMC 22nm, targeted at high assurance applications. It’s a security chip, but far more open than any other security chip; it’s also a general purpose microcontroller that fills a gap in between the Raspberry Pi RP2350 (found on the Pi Pico2) and the NXP iMXRT1062 (found on the Teensy 4.1). It’s the latest step in the Betrusted initiative, spurred by work I did with Ed Snowden 8 years ago trying to ...