Raspberry Pi has revised the RP2350 microcontroller
The new Stepping A4 of the RP2350 microcontroller introduced a year ago corrects some errors. The Raspi makers invite you to hack again.
The Raspberry Pi RP2350 microcontroller in stepping A2
(Image: Christof Windeck/heise medien)
In August 2024, the British company Raspberry Pi Plc. launched its second self-developed microcontroller chip, the RP2350. It is available in several variants as a single chip and is used on numerous developer boards, including the Raspberry Pi Pico 2 and Pico 2 W.
However, the first delivered stepping A2 of the RP2350 contains some errors. For example, there is a problem with excessive leakage currents at the GPIO connections, which has disadvantages with certain circuits (Erratum RP2350-E9). In addition, a hacking challenge has brought some of the RP2350's weak points to light.
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New stepping after Metal Spin
Most of these weaknesses have been corrected in the RP2350 in the new stepping A4. In a blog post, Raspi boss Eben Upton explains how and what has been repaired. It is a so-called metal spin, in which the chip manufacturer adjusts the metal layers above the actual transistors. In addition to the data connections, the metal layers also supply power to the transistors.
To boost confidence, Raspberry Pi Plc. invites you to the new RP2350 Hacking Challenge 2.
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(ciw)
