Summary
- CPU - Cortex-M4F
- NVM - 512KB with NVMController which can be manipulated by provided library called pstorage.
- SDRAM - 64KB
- Oscillators - Existing RC oscillator(LFCLK) + HFCLK(32MHZ). Doesn’t need external xTal for RF.
- Timer - 5 Available.
- Serial - 1 UART + 3 more Serials for(I2C/ SPI)
https://devzone.nordicsemi.com/blogs/792/new-features-in-nrf52/