To my understanding, the RP2350 has two ARM cores and two RISC-V cores, the two pairs are separate, and only one architecture can be used at a time on the chip.
nope. two "slots", each selectable from {ARM, RISCV}. In each, you pick one. so you can configure it at two arm cores, arm + riscv, or two riscv cores. dual-arch is possible, if you desire it
To my understanding, the RP2350 has two ARM cores and two RISC-V cores, the two pairs are separate, and only one architecture can be used at a time on the chip.
nope. two "slots", each selectable from {ARM, RISCV}. In each, you pick one. so you can configure it at two arm cores, arm + riscv, or two riscv cores. dual-arch is possible, if you desire it