AT32UC3B1128 Atmel Corporation, AT32UC3B1128 Datasheet - Page 49

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AT32UC3B1128

Manufacturer Part Number
AT32UC3B1128
Description
Manufacturer
Atmel Corporation

Specifications of AT32UC3B1128

Flash (kbytes)
128 Kbytes
Pin Count
48
Max. Operating Frequency
60 MHz
Cpu
32-bit AVR
# Of Touch Channels
32
Hardware Qtouch Acquisition
No
Max I/o Pins
28
Ext Interrupts
28
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
3
Twi (i2c)
1
Uart
2
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
6
Adc Resolution (bits)
10
Adc Speed (ksps)
384
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
32
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
3.0-3.6 or (1.65-1.95+3.0-3.6)
Operating Voltage (vcc)
3.0-3.6 or (1.65-1.95+3.0-3.6)
Fpu
No
Mpu / Mmu
Yes / No
Timers
10
Output Compare Channels
16
Input Capture Channels
6
Pwm Channels
13
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes

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Company
Part Number
Manufacturer
Quantity
Price
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Manufacturer:
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Part Number:
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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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