ATUC256L4U Atmel Corporation, ATUC256L4U Datasheet - Page 4
ATUC256L4U
Manufacturer Part Number
ATUC256L4U
Description
Manufacturer
Atmel Corporation
Datasheets
1.AT32UC3A0128.pdf
(377 pages)
2.AT32UC3A0128.pdf
(159 pages)
3.ATUC128L4U.pdf
(960 pages)
4.ATUC128L4U.pdf
(92 pages)
Specifications of ATUC256L4U
Flash (kbytes)
256 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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATUC256L4U-D3HT
Manufacturer:
ATMEL
Quantity:
148
Part Number:
ATUC256L4U-D3HT
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
ATUC256L4U-U
Manufacturer:
ATMEL
Quantity:
129
Company:
Part Number:
ATUC256L4U-UES
Manufacturer:
ATMEL
Quantity:
3
- AT32UC3A0128 PDF datasheet
- AT32UC3A0128 PDF datasheet #2
- ATUC128L4U PDF datasheet #3
- ATUC128L4U PDF datasheet #4
- Current page: 4 of 377
- Download datasheet (5Mb)
1.3
1.3.1
1.3.2
4
Microarchitectures
AVR32
AVR32A
AVR32B
The AVR32 architecture defines different microarchitectures. This enables implementations that
are tailored to specific needs and applications. The microarchitectures provide different perfor-
mance levels at the expense of area and power consumption. The following microarchitectures
are defined:
The AVR32A microarchitecture is targeted at cost-sensitive, lower-end applications like smaller
microcontrollers. This microarchitecture does not provide dedicated hardware registers for shad-
owing of register file registers in interrupt contexts. Additionally, it does not provide hardware
registers for the return address registers and return status registers. Instead, all this information
is stored on the system stack. This saves chip area at the expense of slower interrupt handling.
Upon interrupt initiation, registers R8-R12 are automatically pushed to the system stack. These
registers are pushed regardless of the priority level of the pending interrupt. The return address
and status register are also automatically pushed to stack. The interrupt handler can therefore
use R8-R12 freely. Upon interrupt completion, the old R8-R12 registers and status register are
restored, and execution continues at the return address stored popped from stack.
The stack is also used to store the status register and return address for exceptions and scall.
Executing the rete or rets instruction at the completion of an exception or system call will pop
this status register and continue execution at the popped return address.
The AVR32B microarchitecture is targeted at applications where interrupt latency is important.
The AVR32B therefore implements dedicated registers to hold the status register and return
address for interrupts, exceptions and supervisor calls. This information does not need to be
written to the stack, and latency is therefore reduced. Additionally, AVR32B allows hardware
shadowing of the registers in the register file. The INT0 to INT3 contexts may have dedicated
versions of the registers in the register file, allowing the interrupt routine to start executing
immediately.
The scall, rete and rets instructions use the dedicated status register and return address regis-
ters in their operation. No stack accesses are performed.
32000D–04/2011
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