Guidance on using the latest micro:bit revision
nRF52 Application Processor
The nRF52 application processor is where user programs run. A single, complete application including user code, runtime code and Bluetooth stack is loaded and run directly from on chip flash memory. All user accessible GPIO pins are provided by this processor. There is an onboard 2.4GHz radio peripheral used to provide Bluetooth and custom radio capabilities via an off-chip aerial.
Model Nordic nRF52833
Core variant Arm Cortex-M4 32 bit processor with FPU
Flash ROM 512KB
Debug SWD, J-Link/OB