AT32UC3A4256 Atmel Corporation, AT32UC3A4256 Datasheet - Page 86

• Manufacturer Part Number: AT32UC3A4256
• Manufacturer: Atmel Corporation

Specifications of AT32UC3A4256

• Flash (kbytes): 256 Kbytes
• Pin Count: 100
• Max. Operating Frequency: 66 MHz
• Cpu: 32-bit AVR
• Hardware Qtouch Acquisition: No
• Usb Transceiver: 1
• Usb Speed: Hi-Speed
• Usb Interface: Device + OTG
• Spi: 6
• Twi (i2c): 2
• Uart: 4
• Ssc: 1
• Sd / Emmc: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 128
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 3.0 to 3.6
• Operating Voltage (vcc): 3.0 to 3.6
• Fpu: No
• Mpu / Mmu: Yes / No
• Timers: 6
• Output Compare Channels: 6
• Input Capture Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

32002F–03/2010
Instruction
ldm HSB++, r5, r6, r7, r8
stm HSB, r5, r6, r7, r8
add r6, r5
memc IRAM, 3
st.w IRAM[4], r8
memc IRAM, 3
mul r5, r9
memc HSB, 7
ld.w r4, IRAM[16]
memc HSB, 7
sub r7, r4
mul r6, r9
or r5, r8
Cycles
9
6
1
1
1
2
1
4
1
1
1
1
1
1+n=1+2r where r=#regs when reading from HSB addresses
1+n=1+(1+r) where r=#regs when writing to HSB addresses
Requires only one cycle because write buffer was empty
Instruction filling the write buffer
Requires 2 cycles because write buffer was not empty
Next instruction has a memory access, 3 stall cycles needed
Memory not accessed in the 3 following clock cycles, no stall
Description
Instruction not using the write buffer
AVR32
86