AT32UC3A3128 Atmel Corporation, AT32UC3A3128 Datasheet - Page 5

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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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11
2. Programming Model
2.1
2.2
32000D–04/2011
Data Formats
Data Organization
This chapter describes the programming model and the set of registers accessible to the user.
The AVR32 processor supports the data types shown in
Table 2-1.
When any of these types are described as unsigned, the N bit data value represents a non-neg-
ative integer in the range 0 to + 2
When any of these types are described as signed, the N bit data value represents an integer in
the range of -2
Some instructions operate on fractional numbers. For these numbers, the data value represents
a fraction in the range of -1 to +1-2
Data is usually stored in a big-endian way, see
multi-byte data is stored in memory, the most significant byte is stored at the lowest address. All
instructions are interpreted as being big-endian. However, in order to support data transfers that
are little-endian, special endian-translating load and store instructions are defined.
The register file can hold data of different formats. Both byte, halfword (16-bit) and word (32-bit)
formats can be represented, and byte and halfword formats are supported in both unsigned and
signed 2’s complement formats. Some instructions also use doubleword operands. Doubleword
data are placed in two consecutive registers. The most significant word is in the uppermost reg-
ister. Valid register pairs are R1:R0, R3:R2, R5:R4, R7:R6, R9:R8, R11:R10 and R13:R12.
Load and store operations that transfer bytes or halfwords, automatically zero-extends or sign-
extends the bytes or half-words as they are loaded.
Figure 2-1.
Type
Byte
Halfword
Word
Double Word
3 1
3 1
3 1
3 1
3 1
to p
S S S S S S S S S S S S S S S S
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
S S S S S S S S S S S S S S S S S S S S S S S S
Overview of execution modes, their priorities and privilege levels.
N-1
Data representation in the register file
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
to +2
N-1
u p p e r
-1, using two’s complement format.
Data Width
8 bits
16 bits
32 bits
64 bits
N
1 6
1 6
-1.
-(N-1)
S
1 5
1 5
, using two’s complement format.
lo w e r
Figure 2-1 on page
H a lfw o rd
H a lfw o rd
8
8
7
S
7
Table 2-1 on page
b o tto m
B y te
B y te
5. This means that when
0
0
0
0
0
S ig n e x te n d e d b y te
U n s ig n e d b y te
S ig n e x te n d e d h a lfw o rd
U n s ig n e d h a lfw o rd
W o rd
5:
AVR32
5

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