Basically more everything. 2x Cortex M33 cores with floating point, 520KB ram, more PIOs, bunch of secure boot stuff (I have mixed feelings about this), and can boot to a mode with risc-v cores instead of the M33s.
Basically more everything. 2x Cortex M33 cores with floating point, 520KB ram, more PIOs, bunch of secure boot stuff (I have mixed feelings about this), and can boot to a mode with risc-v cores instead of the M33s.
It was $5 but was limited to one per customer (in practice, one per order) at the usual vendors, and became very scarce at the time other pi models did. The wireless version was $10. They later eliminated the non-wireless version, bumped the wireless version to $15, and introduced a new fancier model (Pi Zero 2) that is also $15.