ATSAM3S-EK Atmel, ATSAM3S-EK Datasheet - Page 63
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ATSAM3S-EK
Manufacturer Part Number
ATSAM3S-EK
Description
KIT EVAL FOR ATSAM3S4C
Manufacturer
Atmel
Series
SAM3Sr
Type
MCUr
Specifications of ATSAM3S-EK
Contents
Board, Cables, Power Supply
Silicon Manufacturer
Atmel
Core Architecture
ARM
Core Sub-architecture
Cortex-M3
Kit Contents
Board
Features
TFT Colour LCD Display, SD/MMC Interface
Svhc
No SVHC (15-Dec-2010)
Rohs Compliant
Yes
For Use With/related Products
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATSAM3S-EK
Manufacturer:
Atmel
Quantity:
135
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10.6
10.6.1
10.6.1.1
10.6.1.2
10.6.1.3
10.6.1.4
10.6.2
10.6.2.1
10.6.2.2
10.6.2.3
6500C–ATARM–8-Feb-11
Exception model
Exception states
Exception types
Inactive
Pending
Active
Active and pending
Reset
Non Maskable Interrupt (NMI)
Hard fault
This section describes the exception model.
Each exception is in one of the following states:
The exception is not active and not pending.
The exception is waiting to be serviced by the processor.
An interrupt request from a peripheral or from software can change the state of the correspond-
ing interrupt to pending.
An exception that is being serviced by the processor but has not completed.
An exception handler can interrupt the execution of another exception handler. In this case both
exceptions are in the active state.
The exception is being serviced by the processor and there is a pending exception from the
same source.
The exception types are:
Reset is invoked on power up or a warm reset. The exception model treats reset as a special
form of exception. When reset is asserted, the operation of the processor stops, potentially at
any point in an instruction. When reset is deasserted, execution restarts from the address pro-
vided by the reset entry in the vector table. Execution restarts as privileged execution in Thread
mode.
A non maskable interrupt (NMI) can be signalled by a peripheral or triggered by software. This is
the highest priority exception other than reset. It is permanently enabled and has a fixed priority
of -2.
NMIs cannot be:
A hard fault is an exception that occurs because of an error during exception processing, or
because an exception cannot be managed by any other exception mechanism. Hard faults have
a fixed priority of -1, meaning they have higher priority than any exception with configurable
priority.
• Masked or prevented from activation by any other exception.
• Preempted by any exception other than Reset.
SAM3S Preliminary
63
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