Not 64 bit, it’s 32-bit cortex m33. M33 has, among other things, TrustZone. So there’s some feature, along with developer familiarity and tools that make ARM d

Not 64 bit, it’s 32-bit cortex m33. M33 has, among other things, TrustZone. So there’s some feature, along with developer familiarity and tools that make ARM desirable for an application processor. Mixed architecture doesn’t really cause any significant problems. The design is fully custom in-house design.