Olimex Opto-isolated USB JTAG dongle for programming and emulation AVR-JTAG-USB AVR-JTAG-USB 数据表

 
 
Features: 
AVR-USB-JTAG (complete analog of 
ATMEL’s AVR JTAG ICE) is development tool 
for programming, real time emulation and 
debugging for AVR microcontrollers with JTAG 
interface (ATmega16, ATmega32, ATMega323, 
ATmega162, ATmega169, ATmega128 and all 
other future to come). AVR-USB-JTAG have: 
JTAG 10 pin connector (Atmel layout), status 
LED, USB type A connector. 
AVR-USB-JTAG works transparently with 
AVRSTUDIO as it uses USB to RS232 driver 
inside and AVRSTUDIO just finds ATJTAGICE 
connected to the virtual COM port which FT232 
driver installs. AVR-USB-JTAG allow 
debugging on all new computers and notebooks 
which have no RS232 COM port and removes all 
problems which occur when 
unknown/uncertified USB to RS232 port 
converters are used with the original RS232 
based ATJTAGICE. 
AVR-USB-JTAG is optically isolated from 
USB port, so you can debug directly connected 
to 120/220VAC mains targets. 
AVR-USB-JTAG allows access to all the 
powerful features of the AVR microcontroller. 
All AVR resources can be monitored: Flash 
memory, EEPROM memory, SRAM memory, 
Register File, Program Counter, Fuse and Lock 
Bits, and all I/O modules. AVR-JTAG also 
offers extensive On-chip Debug support for 
break conditions, including break on change of 
Program memory flow, Program memory Break 
Points on single address or address range, and 
Data memory Break Points on single address or 
address range. 
 

-  AVR Studio Operated 
-  Full Emulation of All Analog and Digital 

-  Full JTAG Programming Support 
-  Supports Multiple Devices in a JTAG Scan 

Chain 

-  RS-232 Interface to PC 

-  Full Support for Assembly and High Level 

Languages 

-  Program and Data Breakpoints 
-  All Operations and Breakpoints are Real 

Time 

-  Upgrades are done from AVR Studio 
-  Target Voltage 3.0-5.0V 
-  No need for external power supply – power is 

taken from USB port 

 
Programming: 
To work with AVR-USB-JTAG you need target 
board with JTAG connector (for instance 
Olimex’s AVR-M16 + AVR-P40B-P8535-
8Mhz) and AVRSTUDIO software ( you can 
download from http://www.avrfreaks.net in 
Tools section). 
 
JTAG interface: 
The JTAG connector is 2x5 pin with 0,1" step 
and Atmel’s compatible layout. The PIN.1 is 
marked with square pad on bottom and arrow on 
top. JTAG signals are: 1- TCK, 2- GND, 3- 
TDO, 4- VREF, 5- TMS, 6- NSRST, 7- VCC, 8- 
NTRST, 9- TDI, 10- GND. 
 
JTAG TOP view PCB board layout: 

 

 
Virtual com port driver: 
AVR-USB-JTAG uses FT232 USB to RS232 IC 
from Future Technology devices, you must 
download and install proper driver for your 
computer and OS from: 
http://www.ftdichip.com/Drivers/FT232-
FT245Drivers.htm 

 

Ordering codes: 
AVR-USB-JTAG - assembled and tested 
 

 
 
 
 
 

Copyright(c) 2004, OLIMEX Ltd., All rights reserved. 

Development boards for ARM, PIC, AVR and MSP430 microcontrollers http://www.olimex.com/dev