SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
In this programming model, the CSR[0]GIE (or IER[1]NMIE) bit is not enabled within interrupts service routine of maskable interrupts (INT15–INT4), SWI, or UNDEF interrupt (or NMI). Hence, maskable interrupts (INT15–INT4), SWI, and UNDEF are not nested. However, an NMI is taken as a nested interrupt within a maskable interrupt (INT15–INT4), SWI, or UNDEF.
While adopting this programming model, the following points must be noted:
Note that this programming model offers fast response time to system events via the maskable interrupt lines (INT15–INT4) by fully exploiting the extensive automatic context save/restore feature of the ARP32 CPU (see Section 8.2.4.18.8).