Datasheet

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.
• 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.
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