4.1.4 I/O Interface

The AMBA® AHB-Lite™ interface offers direct access from the CPU to the PORT registers.

Accesses to the AHB-Lite™ and the single cycle I/O interfaces can be made concurrently: The Cortex-M0+ processor can fetch the next instructions while accessing the I/Os, sustaining single cycle I/O accesses for as long as needed.