5 V-tolerant GPIO opens the way to some intriguing retro-nerdery
The Raspberry Pi team has released an update to the RP2350 microcontroller with bug fixes, hardening, and a GPIO tweak that will delight retro hardware enthusiasts.
The A4 stepping brings several improvements, including remedies for the glitches identified in the company's 2024 hacking challenge (though a spokesperson was quick to note they all required physical access to the hardware), as well as the documented GPIO pull-up issue that required affected customers to use some extra circuitry and resistors.