AT32UC3A3128 Atmel Corporation, AT32UC3A3128 Datasheet - Page 6

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AT32UC3A3128

Manufacturer Part Number
AT32UC3A3128
Description
Manufacturer
Atmel Corporation

Specifications of AT32UC3A3128

Flash (kbytes)
128 Kbytes
Pin Count
144
Max. Operating Frequency
66 MHz
Cpu
32-bit AVR
# Of Touch Channels
32
Hardware Qtouch Acquisition
No
Max I/o Pins
110
Ext Interrupts
110
Usb Transceiver
1
Usb Speed
Hi-Speed
Usb Interface
Device + OTG
Spi
6
Twi (i2c)
2
Uart
4
Lin
4
Ssc
1
Sd / Emmc
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
Dac Channels
2
Dac Resolution (bits)
16
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
128
Self Program Memory
YES
External Bus Interface
1
Dram Memory
sdram
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
18
Input Capture Channels
12
Pwm Channels
12
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes

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2.3
6
Instruction Organization
AVR32
AVR32 can access data of size byte, halfword, word and doubleword using dedicated instruc-
tions. The memory system can support unaligned accesses for selected load/store instructions
in some implementations. Any other unaligned access will cause an address exception.
For performance reasons, the user should make sure that the stack always is word aligned. This
means that only word instructions can be used to access the stack. When manipulating the
stack pointer, the user has to ensure that the result is word aligned before trying to load and
store data on the stack. Failing to do so will result in performance penalties. Code will execute
correctly if the stack is unaligned but with a significant performance penalty.
The AVR32 instruction set has both compact and extended instructions. Compact instructions
denotes the instructions which have a length of 16 bits while extended instructions have a length
of 32 bits.
All instructions must be placed on halfword boundaries, see
instructions can be both aligned and unaligned to halfword boundaries. In normal instruction
flow, the instruction buffer will always contain enough entries to ensure that compact, aligned
extended and unaligned extended instructions can be issued in a single cycle.
Change-of-flow operations such as branches, jumps, calls and returns may in some implemen-
tations require the instruction buffer to be flushed. The user should consult the Technical
Reference Manual for the specific implementation in order to determine how alignment of the
branch target address affects performance.
Table 2-2.
Byte Address
Byte Address
Instructions are stored in memory in a big endian fashion and must be aligned on
half word boundaries
0
0
H1
E2
C1
F2
D
A
I
1
1
2
2
H2
E1
C2
F1
G
B
J
3
3
Table 2-2 on page
Word Address
N+24
N+20
N+16
N+12
N+8
N+4
N
6. Extended
32000D–04/2011

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