ATUC128L4U Atmel Corporation, ATUC128L4U Datasheet - Page 5

• Manufacturer Part Number: ATUC128L4U
• Manufacturer: Atmel Corporation

Specifications of ATUC128L4U

• Flash (kbytes): 128 Kbytes
• Pin Count: 48
• Max. Operating Frequency: 50 MHz
• Cpu: 32-bit AVR
• # Of Touch Channels: 17
• Hardware Qtouch Acquisition: Yes
• Max I/o Pins: 36
• Ext Interrupts: 36
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 1
• Twi (i2c): 2
• Uart: 4
• Lin: 4
• Ssc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 12
• Adc Speed (ksps): 460
• Analog Comparators: 8
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 16
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: Yes
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.62 to 3.6
• Operating Voltage (vcc): 1.62 to 3.6
• Fpu: No
• Mpu / Mmu: Yes / No
• Timers: 6
• Output Compare Channels: 18
• Input Capture Channels: 12
• Pwm Channels: 35
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

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