Here the Amontec JTAGkey and Amontec JTAGkey-2 dongles have an real advantage since the pin 2 is not used, not connected instead the JTAGkey JTAG emulator . From long time ago, a lot of companies are making no diff between pinout on the target board and the pinout on the emulator ! Pin number 2 of the Multi-ICE ARM 20-pin connector are to be used as VSUPPLY FOR THE EMULATOR FROM THE TARGET BOARD. On the target board, you may connect VREF to VSUPPLY On the JTAG emulator, you CANNOT connect VREF to VSUPPLY ... very dangerous for the target itself !
Also, you have to note Amontec JTAGkey and Amontec JTAGkey-2 have auto-sense IO level from 1.4V to 5.5V, based on the VREF pin 1 ! --- Regards, Sébastien Farquet http://www.amontec.com/ Amontec JTAGkey-2 : High speed USB JTAG interface Le 2012-02-08 13:29, James Robinson a écrit : > Fabio, > I just did a pin check on arm-usb-ocd and pin 1 and 2 are tied > together (0 ohms) . I would be VERY careful plugging it into our eval > boads. On my imx53qsb, it would short (SH20) the 1.8V bus to the 3.3V > bus. I do see that on the schematic that it is possible to remove a > short (SH20) and connect the 1.8V bus (R163) to pin 1&2. > What do you think? > James > > On Wed, Feb 8, 2012 at 7:04 AM, Fabio Estevam <[email protected]> > wrote: >> On Wed, Feb 8, 2012 at 9:41 AM, James Robinson <[email protected]> >> wrote: >>> Fabio, >>> It looks some of the differences in the JTAG on the imx28evk and >>> the >>> imx53qsb are: >>> 1) Reference voltage is 3.3 on imx28evk and 1.8 on the imx53qsb. >> >> Yes, we need to make sure our interfaces support 1.8V, >> >>> 2) pin 11 JTAG_TRST on the imx28evk is going to the cpu and on the >>> imx53qsb it is pulled to ground. >> >> Pin 11 is JTAG_RTCK and it is OK to be pulled down. >> >>> 3) pin 17 JTAG_DE is floating on the imx2evk and on the imx52qsb >>> is >>> pulled high. >> >> On mx31pdk JTAG_DE is also pulled high and it works fine for me. >> >> Regards, >> >> Fabio Estevam > > > ------------------------------------------------------------------------------ > Keep Your Developer Skills Current with LearnDevNow! > The most comprehensive online learning library for Microsoft > developers > is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, > MVC3, > Metro Style Apps, more. Free future releases when you subscribe now! > http://p.sf.net/sfu/learndevnow-d2d > _______________________________________________ > OpenOCD-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/openocd-devel ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ OpenOCD-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/openocd-devel
