ATUC256L4U Atmel Corporation, ATUC256L4U Datasheet - Page 91

• Manufacturer Part Number: ATUC256L4U
• Manufacturer: Atmel Corporation

Specifications of ATUC256L4U

• Flash (kbytes): 256 Kbytes
• Pin Count: 48
• Max. Operating Frequency: 50 MHz
• Cpu: 32-bit AVR
• # Of Touch Channels: 17
• Hardware Qtouch Acquisition: Yes
• Max I/o Pins: 36
• Ext Interrupts: 36
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 1
• Twi (i2c): 2
• Uart: 4
• Lin: 4
• Ssc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 12
• Adc Speed (ksps): 460
• Analog Comparators: 8
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 16
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: Yes
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.62 to 3.6
• Operating Voltage (vcc): 1.62 to 3.6
• Fpu: No
• Mpu / Mmu: Yes / No
• Timers: 6
• Output Compare Channels: 18
• Input Capture Channels: 12
• Pwm Channels: 35
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

8.3.2.26
8.3.2.27
8.3.2.28
32000D–04/2011
Floating-point Exception
Coprocessor Exception
Supervisor call
The Floating-point exception is generated when the optional Floating-Point Hardware signals
that an IEEE exception occurred, or when another type of error from the floating-point hardware
occurred..
The Coprocessor exception occurs when the addressed coprocessor does not acknowledge an
instruction. This permits software implementation of coprocessors.
Supervisor calls are signalled by the application code executing a supervisor call (scall) instruc-
tion. The scall instruction behaves differently depending on which context it is called from. This
allows scall to be called from other contexts than Application.
When the exception routine is finished, execution continues at the instruction following scall. The
rets instruction is used to return from supervisor calls.
RSR_EX = SR;
RAR_EX = PC;
SR[R] = 0;
SR[J] = 0;
SR[M2:M0] = B’110;
SR[EM] = 1;
SR[GM] = 1;
PC = EVBA + 0x2C;
RSR_EX = SR;
RAR_EX = PC;
SR[R] = 0;
SR[J] = 0;
SR[M2:M0] = B’110;
SR[EM] = 1;
SR[GM] = 1;
PC = EVBA + 0x30;
If ( SR[M2:M0] == {B’000 or B’001} )
else
RAR_SUP ← PC + 2;
RSR_SUP ←
PC ← EVBA + 0x100;
SR[M2:M0] ← B’001;
LR
PC ← EVBA + 0x100;
Current Context
SR;
← PC + 2;
AVR32
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