ATSAM3U-EK Atmel, ATSAM3U-EK Datasheet - Page 188

Manufacturer Part Number

KIT EVAL FOR AT91SAM3U CORTEX

Manufacturer

Processor To Be Evaluated

Data Bus Width

Interface Type

Operating Supply Voltage

Silicon Manufacturer

Core Architecture

Core Sub-architecture

Silicon Core Number

Silicon Family Name

Kit Contents

Board CD Docs

Rohs Compliant

For Use With/related Products

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Manufacturer

Part Number:

Manufacturer:

• VECTCLRACTIVE

Reserved for Debug use. This bit reads as 0. When writing to the register you must write 0 to this bit, otherwise behavior is

Unpredictable.

Reserved for Debug use. This bit reads as 0. When writing to the register you must write 0 to this bit, otherwise behavior is

Unpredictable.

SAM3U Series

Binary point

The PRIGROUP field indicates the position of the binary point that splits the PRI_n fields in the

Interrupt Priority Registers into separate group priority and subpriority fields.

how the PRIGROUP value controls this split.

Table 13-31. Priority grouping

Determining preemption of an exception uses only the group priority field, see

grouping” on page

PRI_n[7:0] field showing the binary point. x denotes a group priority field bit, and y denotes a sub-

priority field bit.

Interrupt priority level value, PRI_N[7:0]

Group priority

6430D–ATARM–25-Mar-11

“Interrupt priority

Subpriorities