GPIO Port Output: Driver for writing to an entire GPIO port at a time
Flash IAP: Driver allowing In-Application Programming (IAP) of the MCU flash memory.
Low-Precision Ticker: Also known as the Low-Power Ticker, this peripheral keeps time at a low-frequency clock (usually 32kHz) and generates events for the application. Usually it is used to implement low power sleep.
True Random Number Generator: Cryptographic-grade True Random Number Generator (TRNG). This is required to implement SSL communications securely unless you provision devices with an entropy seed stored in nonvolatile storage.