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AVR JTAG
Embedded debugging system
Description
AVR JTAG is tool for debugging
devices basis on Atmel AVR microcontrollers family. AVR JTAG
is full analogue of JTAG ICE from Atmel.
For work AVR JTAG used the AVR Studio application from Atmel.
AVR JTAG is supports all microcontrollers having JTAG interface:
ATmega16;
ATmega162;
ATmega169;
ATmega32;
ATMega323;
ATMega64;
ATmega128, etc...
New devices can be added by embedded in AVR Studio JTAG software update.
Connection
Connect AVR JTAG to the PC, and target debugged device to AVR JTAG before run AVR Studio. It will enable AVR Studio automatically to determine AVR JTAG and debugged device.
Connection to the PC
AVR JTAG is connected
to standard PC COM port. For connection is used 9-pin "direct"
cable. At start AVR Studio try automatically searches all
supported devices, connected to COM1, COM2, COM3, etc. Search
will be stopped then supported device will be found.
For example: AVR Prog is connected to COM1, and AVR JTAG to
COM2.
Result: AVR Studio will find only AVR Prog.
Please check before run AVR Studio what all other devices
(AVR Prog, STK500, etc.) is disconnected. Or set COM port
which connected AVR JTAG manually.
If COM port which connected AVR JTAG, is used by other application(for
example, the terminal) AVR Studio can not find AVR JTAG. Finish
these application, before start AVR Studio.
Connection to the debugged device
For connection to the
debugged device 6 lines are used: TCK, TDO, TDI, TMS,
VTref and GND,
The circuit of connection to the microcontroller.
Power supply connection
AVR JTAG receives a power
external DC 9…12V power supply used 2.5 mm connector.
Polarity of a source is not important.
For correct detection of AVR JTAG the power to debugging device
and AVR JTAG is need to be up before run debugging (AVR Studio
button "Start Debugging").
The following steps are recommended:
1. Power up debugging device;
2. Power up AVR JTAG;
3. Run AVR Studio.
Update
HEX file for AVR Studio
4.10 build 356 flash4_10.zip
P.S. AVR JTAG is full
compatible with original Atmel AVR JTAG ICE.
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