Datasheet

161
11011B–ATARM–21-Feb-12
SAM3N
10.20.8 Software Trigger Interrupt Register
Write to the STIR to generate a Software Generated Interrupt (SGI). See the register summary
in Table 10-27 on page 151 for the STIR attributes.
When the USERSETMPEND bit in the SCR is set to 1, unprivileged software can access the
STIR, see “System Control Register” on page 173.
Only privileged software can enable unprivileged access to the STIR.
The bit assignments are:
•INTID
Interrupt ID of the required SGI, in the range 0-239. For example, a value of b000000011 specifies interrupt IRQ3.
31 30 29 28 27 26 25 24
Reserved
23 22 21 20 19 18 17 16
Reserved
15 14 13 12 11 10 9 8
Reserved INTID
76543210
INTID