Olimex High-speed 3-IN-1 fast USB ARM JTAG, USB-to-RS232 virtual port and power supply 5VDC device (supported by OpenOCD open s ARM-USB-OCD-H 数据表

 

 

 

 

 

ARM-USB-OCD 

rev 1.00/07-2006 

 

 

 

 
The base features are: 
 

- based 

on 

FT2232L IC from Future Technology Devices International Ltd. 

- fast 

speed 

USB 2.0 JTAG dongle interface, can be used with any ARM devices for programming and debugging 

(which are currently supported by openOCD).  

- 

the JTAG cable uses ARM's standard 2x10 pin JTAG connector  

- 

supports ARM targets working in voltage range 2.0 – 5.0 V DC 

- 

software supported by OpenOCD (open source) debugger 

- adds 

virtual 

RS232 port to your computer with all modem signals like: DTR, DSR, DCD, RTS, CTS, Rx, Tx 

- 

can be used as power supply to your target board with three jumper selectable power supplies: 5V 9V and 12VDC, 
USB source current is limited with resetable fuse at 300mA, at the different output voltage the maximum current is 
different: 5V/200mA, 9V/100mA, 12V/70mA, note that this also depend on your USB host current capabilities, if other 
USB devices are attached to your computer or if the laptop is running on batteries these figures may be different and 
depend on your computer USB host. 

- 

CD with Windows installer for full featured and open source tools as alternative to the commercial ARM 
development packages: 

, 

 and 

. 

 
FT2232 signal assignments: 
 

 

 

 
 
 
Copyright © 2006, OLIMEX Ltd. All right reserved. 
http://www.olimex.com/dev 

 is unique device which combine JTAG debugging

hardware,  RS232  virtual port and  power supply adapter in one single 
compact form. Many of the new laptop computers have no parallel nor serial 
ports but only USB, with ARM-USB-OCD you can debug your ARM boards, 
have full featured virtual RS232 port with all modem signals on it and the 
power jack can provide three fixed value voltages 5V – 9V – 12V DC via 
jumper selection. 

JTAG signals 
 
VREF – voltage follower input for the output buffers adjust JTAG signals 
as per your target board voltage levels 

 -> TCK;  

 

 -> TDI;  

 

 -> TDO;    

 

 -> TMS; 

 -> 0 to enable JTAG buffers;  

 -> 0 if target present;  

 -> TSRST in;  

 

 -> RTCK;  

 

 -> TRST;  

 

 -> TSRST;  

 -> TRST buffer enable 

 -> RED LED; 

RS232 signals 
 

 -> RS232 Tx 

 -> RS232 Rx 

 -> RS232 RTS 

 -> RS232 CTS 

 -> RS232 DTR 

 -> RS232 DSR 

 -> RS232 DCD 

Power supply jumpers: 

 

the power supply jumpers are on 
right side of the 2x10 pin JTAG 
connector. 

- 

If both jumpers are open 
the output voltage is 

 

- If 

right jumper is closed 

the output voltage is 

 

- If 

left jumper is closed the 

output voltage is 

 

(this is the default setting)