AT32UC3B0256 Atmel Corporation, AT32UC3B0256 Datasheet - Page 284

• Manufacturer Part Number: AT32UC3B0256
• Manufacturer: Atmel Corporation

Specifications of AT32UC3B0256

• Flash (kbytes): 256 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 60 MHz
• Cpu: 32-bit AVR
• # Of Touch Channels: 32
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 44
• Ext Interrupts: 44
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device + OTG
• Spi: 4
• Twi (i2c): 1
• Uart: 3
• Ssc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• 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

284
AVR32
PREF – Cache Prefetch
Architecture revision:
Architecture revision1 and higher.
Description
This instruction allows the programmer to explicitly state that the cache should prefetch the
specified line. The memory system treats this instruction in an implementation-dependent man-
ner, and implementations without cache treats the instruction as a NOP. A prefetch instruction
never reduces the performance of the system. If the prefetch instruction performs an action that
would lower the system performance, it is treated as a NOP. For example, if the prefetch instruc-
tion is about to generate an addressing exception, the instruction is cancelled and no exception
is taken.
Operation:
I.
Syntax:
Operands:
I.
Status Flags:
Opcode:
31
1
15
Prefetch cache line containing the address (Rp + SE(disp16)).
pref
p ∈ {0, 1, …, 15}
disp ∈ {-32768, -32767, ..., 32767}
Q:
V:
N:
Z:
C:
1
29
1
Rp[disp]
Not affected.
Not affected.
Not affected.
Not affected.
Not affected.
28
1
0
0
1
0
disp16
0
0
0
20
1
19
Rp
32000D–04/2011
0
16