3..5V USB AVR JTAG ICE - programmer and debugger with USB to UART converter option
The USB AVR JTAG ICE together with AVR Studio is a complete tool for programming and doing On-Chip Debugging on most useful AVR 8-bit RISC microcontrollers with JTAG interface.
A power undertakes directly from USB, that excludes necessity for the external power supply. Also JTAG ICE provides power supply +5V 350mA output for your devices. Windows defines the device as a virtual COM-port. One more pleasant feature is such most often the function necessary to developers as convertion interfaces USB in UART TTL - in fact in modern computers can be met all the COM-port less often, and RS232 the interface is still widely used. Certainly this feature will be demanded to developers at debugging the programs using UART the interface.
The JTAG ICE uses the standard JTAG interface to enable the user to do programming and real time emulation of the microcontroller while it is running in the target system. The JTAGICE is supported by AVR Studio.
JTAG ICE supports most useful ATMEL microcontrollers with JTAG interface. Currently the JTAGICE supports the following devices (are most often applied by development engineers):
ATmega16(L), ATmega162(L), ATmega169(L or V), ATmega32(L), ATmega323(L), ATmega64(L), ATmega128(L), AT90CAN128.
The list is updated as new versions are released. Please check official ATMEL site for the latest information.