Atmel ARM-Based Evaluation Kit for SAM4S16C, 32-Bit ARM® Cortex® Microcontroller ATSAM4S-WPIR-RD ATSAM4S-WPIR-RD Data Sheet
Product codes
ATSAM4S-WPIR-RD
79
SAM4S Series [DATASHEET]
Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14
12.4.3.3 Exception Handlers
The processor handles exceptions using:
Interrupt Service Routines (ISRs)
Interrupts IRQ0 to IRQ34 are the exceptions handled by ISRs.
Fault Handlers
Hard fault, memory management fault, usage fault, bus fault are fault exceptions handled by the fault
handlers.
System Handlers
NMI, PendSV, SVCall SysTick, and the fault exceptions are all system exceptions that are handled by
system handlers.
12.4.3.4 Vector Table
The vector table contains the reset value of the stack pointer, and the start addresses, also called exception
least-significant bit of each vector must be 1, indicating that the exception handler is Thumb code.
Figure 12-6.
Vector Table
On system reset, the vector table is fixed at address 0x00000000. Privileged software can write to the SCB_VTOR
to relocate the vector table start address to a different memory location, in the range 0x00000080 to 0x3FFFFF80,
see
.
Initial SP value
Reset
Hard fault
NMI
Memory management fault
Usage fault
Bus fault
0x0000
0x0004
0x0008
0x000C
0x0010
0x0014
0x0018
Reserved
SVCall
PendSV
Reserved for Debug
SysTick
IRQ0
Reserved
0x002C
0x0038
0x003C
0x0040
Offset
Exception number
2
3
4
5
6
11
12
14
15
16
18
13
7
10
1
Vector
.
.
.
.
.
8
9
IRQ1
IRQ2
0x0044
IRQ239
17
0x0048
0x004C
255
.
.
.
.
.
.
.
.
.
.
0x03FC
IRQ number
-14
-13
-12
-11
-10
-5
-2
-1
0
2
1
239