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Photon-Emission-Guided Laser Fault Injection Enables RP2350 Secure Debug

220 points · 92 comments · synack

  1. rkagerer · · focus · HN ↗
    The RP2350 is Raspberry Pi’s dual-core microcontroller: each processor socket can select either an Arm Cortex-M33 or a RISC-V Hazard3 core at boot.

    Does that mean there are four cores on the die? Is there crazy amounts of MUXing going on? Does the extra, semi-unused area give the chip a premium price tag? Or did I misinterpret this?

    1. LukeShu · · focus · HN ↗
      > a premium price tag?

      $0.80 in bulk. Around $1.25 for individual quantities, depending on who your reseller is.

      AIUI, the CPU cores are a small fraction of the die area compared to all the peripherals on the chip.

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