SAM3N2C Atmel Corporation, SAM3N2C Datasheet - Page 71
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SAM3N2C
Manufacturer Part Number
SAM3N2C
Description
Manufacturer
Atmel Corporation
Specifications of SAM3N2C
Flash (kbytes)
128 Kbytes
Pin Count
100
Max. Operating Frequency
48 MHz
Cpu
Cortex-M3
# Of Touch Channels
23
Hardware Qtouch Acquisition
No
Max I/o Pins
47
Ext Interrupts
47
Quadrature Decoder Channels
2
Usb Speed
No
Usb Interface
No
Spi
3
Twi (i2c)
2
Uart
4
Ssc
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
16
Adc Resolution (bits)
10
Adc Speed (ksps)
384
Resistive Touch Screen
No
Dac Channels
1
Dac Resolution (bits)
10
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
16
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8/3.3
Operating Voltage (vcc)
1.62 to 3.6
Fpu
No
Mpu / Mmu
no / no
Timers
6
Output Compare Channels
6
Input Capture Channels
6
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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10.7.1
10.7.2
11011A–ATARM–04-Oct-10
Fault types
Fault escalation and hard faults
Table 10-11
tus register, and the register bit that indicates that the fault has occurred. See
Fault Status Register” on page 181
Table 10-11. Faults
1.
All faults exceptions except for hard fault have configurable exception priority, see
dler Priority Registers” on page
faults, see
Usually, the exception priority, together with the values of the exception mask registers, deter-
mines whether the processor enters the fault handler, and whether a fault handler can preempt
another fault handler. as described in
In some situations, a fault with configurable priority is treated as a hard fault. This is called prior-
ity escalation, and the fault is described as escalated to hard fault. Escalation to hard fault
occurs when:
Fault
Bus error on a vector read
Fault escalated to a hard fault
Bus error:
Precise data bus error
Imprecise data bus error
Attempt to access a coprocessor
Undefined instruction
Attempt to enter an invalid instruction
set state
Invalid EXC_RETURN value
Illegal unaligned load or store
Divide By 0
• an internally-detected error such as an undefined instruction or an attempt to change state
• attempting to execute an instruction from a memory region marked as Non-Executable
• A fault handler causes the same kind of fault as the one it is servicing. This escalation to hard
with a BX instruction
fault occurs because a fault handler cannot preempt itself because it must have the same
priority as the current priority level.
during exception stacking
during exception unstacking
during instruction prefetch
Attempting to use an instruction set other than the Thumb instruction set.
(1)
“System Handler Control and State Register” on page
shows the types of fault, the handler used for the fault, the corresponding fault sta-
176. Software can disable execution of the handlers for these
for more information about the fault status registers.
“Exception model” on page
Handler
Hard fault
Bus fault
Usage
fault
Bit name
VECTTBL
FORCED
-
STKERR
UNSTKERR
IBUSERR
PRECISERR
IMPRECISER
R
NOCP
UNDEFINSTR
INVSTATE
INVPC
UNALIGNED
DIVBYZERO
179.
63.
Fault status register
“Hard Fault Status
Register” on page 187
-
“Bus Fault Status Register”
on page 183
“Usage Fault Status
Register” on page 185
SAM3N
“Configurable
“System Han-
(XN).
71
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