While the Raspberry Pi has very good support for an I2C bus, a lot of very cool chips – including the in system programmer for just about every ATtiny and ATmega microcontroller – use an SPI bus.

SPI's Phoenix Motorcars to Showcase Electric Shuttle Bus, Lithium-Ion Forklift, Solar-Powered Pickup Truck and EV Charging Solutions at ACT Expo ACCESS Newswire Tue, May 3, 2022, 12:45 AM 5 min read ...

The Arduino’s ATmega328 can drive the SPI bus at 8MHz, while the Teensy’s Kinetis can ramp things up to 24MHz. Speed isn’t everything though.

One reason for this triggered sequence approach is that the 1-wire bus main interface has no hope of keeping up with the raw data rate of its slave interface – the 1-wire interface works at 11kbit/s ( ...