AT32UC3C2256C Atmel Corporation, AT32UC3C2256C Datasheet - Page 83

• Manufacturer Part Number: AT32UC3C2256C
• Manufacturer: Atmel Corporation

Specifications of AT32UC3C2256C

• Flash (kbytes): 256 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 66 MHz
• Cpu: 32-bit AVR
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 45
• Ext Interrupts: 64
• Usb Transceiver: 1
• Quadrature Decoder Channels: 1
• Usb Speed: Full Speed
• Usb Interface: Device + OTG
• Spi: 5
• Twi (i2c): 2
• Uart: 4
• Can: 2
• Lin: 4
• Ssc: 1
• Ethernet: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 11
• Adc Resolution (bits): 12
• Adc Speed (ksps): 2000
• Analog Comparators: 2
• Resistive Touch Screen: No
• Dac Channels: 2
• Dac Resolution (bits): 12
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 68
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 3.0 to 3.6 or 4.5 to 5.5
• Operating Voltage (vcc): 3.0 to 3.6 or 4.5 to 5.5
• Fpu: Yes
• Mpu / Mmu: Yes / No
• Timers: 3
• Output Compare Channels: 13
• Input Capture Channels: 6
• Pwm Channels: 14
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

8.3.2.7
8.3.2.8
32000D–04/2011
NMI Exception
INT3 Exception
The NMI exception is generated when the NMI input line to the core is asserted. The NMI excep-
tion can not be masked by the SR[GM] bit. However, the core ignores the NMI input line when
processing an NMI Exception (the SR[M2:M0] bits are B’111). This guarantees serial execution
of NMI Exceptions, and simplifies the NMI hardware and software mechanisms.
Since the NMI exception is unrelated to the instruction stream, the instructions in the pipeline are
allowed to complete. After finishing the NMI exception routine, execution should continue at the
instruction following the last completed instruction in the instruction stream.
The INT3 exception is generated when the INT3 input line to the core is asserted. The INT3
exception can be masked by the SR[GM] bit, and the SR[I3M] bit. Hardware automatically sets
the SR[I3M] bit when accepting an INT3 exception, inhibiting new INT3 requests when process-
ing an INT3 request.
The INT3 Exception handler address is calculated by adding EVBA to an interrupt vector offset
specified by an interrupt controller outside the core. The interrupt controller is responsible for
providing the correct offset.
Since the INT3 exception is unrelated to the instruction stream, the instructions in the pipeline
are allowed to complete. After finishing the INT3 exception routine, execution should continue at
the instruction following the last completed instruction in the instruction stream.
SR[GM] = 1;
PC = EVBA + 0x0C;
RSR_NMI = SR;
RAR_NMI = Address of first noncompleted instruction;
SR[R] = 0;
SR[J] = 0;
SR[M2:M0] = B’111;
SR[EM] = 1;
SR[GM] = 1;
PC = EVBA + 0x10;
RSR_INT3 = SR;
RAR_INT3 = Address of first noncompleted instruction;
SR[R] = 0;
SR[J] = 0;
SR[M2:M0] = B’101;
SR[I3M] = 1;
SR[I2M] = 1;
SR[I1M] = 1;
SR[I0M] = 1;
PC = EVBA + INTERRUPT_VECTOR_OFFSET;
AVR32
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