SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
Since loop context is fully saved by hardware while taking an interrupt, HLA is used within an ISR context freely without requiring any additional context save. For allowing nested interrupts, the shadow copies of HLA registers must be saved off to the stack explicitly along with other shadow registers. This helps achieve very-low interrupt latency in the ARP32 CPU under a single-level-nested-interrupt use model.