Datasheet

57
SAM4S Series [DATASHEET]
11100F–ATARM–29-Jan-14
12.4.1.10 Interrupt Program Status Register
Name: IPSR
Access: Read/Write
Reset: 0x000000000
The IPSR contains the exception type number of the current Interrupt Service Routine (ISR).
• ISR_NUMBER: Number of the Current Exception
0 = Thread mode
1 = Reserved
2 = NMI
3 = Hard fault
4 = Memory management fault
5 = Bus fault
6 = Usage fault
7–10 = Reserved
11 = SVCall
12 = Reserved for Debug
13 = Reserved
14 = PendSV
15 = SysTick
16 = IRQ0
49 = IRQ34
See “Exception Types” for more information.
31 30 29 28 27 26 25 24
–
23 22 21 20 19 18 17 16
–
15 14 13 12 11 10 9 8
– ISR_NUMBER
76543210
ISR_NUMBER