AT32UC3C0256C Atmel Corporation, AT32UC3C0256C Datasheet - Page 49

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AT32UC3C0256C

Manufacturer Part Number
AT32UC3C0256C
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of AT32UC3C0256C

Flash (kbytes)
256 Kbytes
Pin Count
144
Max. Operating Frequency
66 MHz
Cpu
32-bit AVR
Hardware Qtouch Acquisition
No
Max I/o Pins
123
Ext Interrupts
144
Usb Transceiver
1
Quadrature Decoder Channels
2
Usb Speed
Full Speed
Usb Interface
Device + OTG
Spi
7
Twi (i2c)
3
Uart
5
Can
2
Lin
5
Ssc
1
Ethernet
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
16
Adc Resolution (bits)
12
Adc Speed (ksps)
2000
Analog Comparators
4
Resistive Touch Screen
No
Dac Channels
4
Dac Resolution (bits)
12
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
68
Self Program Memory
YES
External Bus Interface
1
Dram Memory
sdram
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
6
Output Compare Channels
22
Input Capture Channels
12
Pwm Channels
20
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes

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5.3.3.4
32000D–04/2011
DTLB Modified
This exception is issued if a valid memory write operation is performed to a page that has never
been written before. This is detected by the Dirty-bit in the matching TLB entry reading zero.
1. Examine the TLBEAR and TLBEHI registers in order to identify the page that caused
2. Set the Dirty bit in the read page table entry and write this entry back to the page table
3. Use the fetched page table entry to update the necessary bits in PTEHI and PTELO.
4. The TLBEHI[I] register is updated by hardware to indicate that it was a DTLB miss.
5. Execute the tlbw instruction in order to update the TLB entry.
6. Finish the exception handling and return to the application by executing the rete
the fault. Use this to index the page table pointed to by PTBR and fetch the desired
page table entry.
The following bits must be updated: V, PFN, C, G, B, AP[2:0], SZ[1:0], W, D.
Ensure that MMUCR[DRP] points to the TLB entry to replace. An entry for the faulting
page must already exist in the DTLB, and MMUCR[DRP] must point to this entry, other-
wise multiple DTLB hits may occur.
instruction.
AVR32
49

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