Single Cycle I/O Port

The device allows direct access to PORT registers. Accesses to the AMBA® AHB-Lite and the single cycle I/O interface can be made concurrently, so the Cortex-M23 processor can fetch the next instructions while accessing the I/Os. This enables single cycle I/O access to be sustained for as long as necessary.
Note: The Crypto Accelerator peripheral also benefits from this port. Refer to the Crypto Acceleration section for more information.