Atmel SAM4S Xplained Pro Starter Kit Atmel ATSAM4S-XSTK ATSAM4S-XSTK Data Sheet
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Product codes
ATSAM4S-XSTK
193
SAM4S [DATASHEET]
11100E–ATARM–24-Jul-13
Note:
1. PRI_n[7:0] field showing the binary point. x denotes a group priority field bit, and y denotes a subpriority field bit.
Determining preemption of an exception uses only the group priority field.
• SYSRESETREQ: System Reset Request
0: No system reset request.
1: Asserts a signal to the outer system that requests a reset.
This is intended to force a large system reset of all major components except for debug. This bit reads as 0.
• VECTCLRACTIVE
Reserved for Debug use. This bit reads as 0. When writing to the register, write 0 to this bit, otherwise the behavior is
unpredictable.
unpredictable.
• VECTRESET
Reserved for Debug use. This bit reads as 0. When writing to the register, write 0 to this bit, otherwise the behavior is
unpredictable.
unpredictable.
0b101
bxx.yyyyyy
[7:6]
[5:0]
4
64
0b110
bx.yyyyyyy
[7]
[6:0]
2
128
0b111
b.yyyyyyy
None
[7:0]
1
256
Interrupt Priority Level Value, PRI_N[7:0]
Number of
PRIGROUP
Binary Point
(1)
Group Priority Bits
Subpriority Bits
Group Priorities
Subpriorities