ATxmega256A3U Atmel Corporation, ATxmega256A3U Datasheet - Page 50

• Manufacturer Part Number: ATxmega256A3U
• Manufacturer: Atmel Corporation

Specifications of ATxmega256A3U

• Flash (kbytes): 256 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 32 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 50
• Ext Interrupts: 50
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 10
• Twi (i2c): 2
• Uart: 7
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 16
• Adc Resolution (bits): 12
• Adc Speed (ksps): 2000
• Analog Comparators: 4
• Resistive Touch Screen: No
• Dac Channels: 2
• Dac Resolution (bits): 12
• Temp. Sensor: Yes
• Crypto Engine: AES/DES
• Sram (kbytes): 16
• Eeprom (bytes): 4096
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: Yes
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.6 to 3.6
• Operating Voltage (vcc): 1.6 to 3.6
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 7
• Output Compare Channels: 22
• Input Capture Channels: 22
• Pwm Channels: 22
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

30. Programming and Debugging
30.1
30.2
8386A–AVR–07/11
Features
Overview
•
•
•
•
Atmel
sary functions for efficient development. All external programming and debugging are done
through the Program and Debug Interface (PDI), or the JTAG interface.
The Program and Debug Interface is 2-pin interface that uses the Reset pin and a dedicated pin.
No I/O pins are required during programming or debugging.
The JTAG Interface is a 4-pin IEEE std. 1149.1 compliant interface. This also has Boundary-
scan capabilities according to the IEEE std. 1149.1 (JTAG) Standard
In addition to the PDI and JTAG interface, programming can also be done through a bootloader.
A bootloader in the device can use any other communication interface such as UART, TWI or
SPI to download and program new application code to the Flash memory.
Debug is supported through a on-chip debug system that offers Non-Intrusive Real-Time debug.
It does not require any software or hardware resources expect for the device expect pin connec-
tion. Using Atmel’s tool chain, it offers complete program flow control and has supported for
unlimited number of program and complex data breakpoints. Application debug can be done
from C and high level language source code level, as well as assembler and disassembler level.
Programming
Debugging
Program and Debug Interface (PDI)
JTAG Interface
– External programming through the PDI or JTAG interface
– Bootloader support for programming through any communication interface
– Non-Intrusive Real-Time On-Chip Debug System
– No software or hardware resources required from device expect pin connection
– Program Flow Control
– Unlimited Number of User Program Breakpoints
– Unlimited Number of User Data Breakpoints, break on:
– No limitation on device clock frequency
– 2-pin interface for external programming and debugging
– Uses the Reset pin and a dedicated pin
– No I/O pins required during programming or debugging
– 4-pin IEEE std. 1149.1 compliant interface for programming and debugging
– Boundary-scan capabilities According to the IEEE std. 1149.1 (JTAG) Standard
®
AVR
Minimal protocol overhead for fast operation
Built in error detection and handling for reliable operation
Go, Stop, Reset, Step into, Step over, Step out, Run-to-Cursor
Data location read, write or both read and write
Data location content equal or not equal to a value
Data location content is greater or smaller than a value
Data location content is within or outside a range
®
XMEGA
®
devices together with Atmel’s development tool chain include the neces-
XMEGA A3U
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