power LED off when connecting Jlink!?

hg-chen · ‎2007-04-20

Posted on April 20, 2007 at 23:41

hg-chen · ‎2007-04-20

Posted on April 20, 2007 at 12:19

STR750-SK/IAR is used,

set jumper to EXT power, connect 9V DC to power jack,

the power LED is on and message displayed on LCD panel

but when I connect Jlink to the board,

the power LED is off!?

any idea what happened?

note that there is no problem with this Jlink connect to STR710-SK/IAR

and external 9V DC supply!

hg-chen · ‎2007-04-20

Posted on April 20, 2007 at 22:55

I connect 9V DC with jumpper set to EXT,

then connect Jlink, and the power LED goes off,

and I execute the Jlink.exe

the message reply in DOS prompt are

SEGGER J-LINK Commander V3.10b ('?' for help)

Compiled Feb 9 2006 20:21:29

Can not connect to J-Link via USB

J-Link>

hg-chen · ‎2007-04-20

Posted on April 20, 2007 at 23:01

Sorry for my careless,

I forget to connect Jlink to PC with last action,

now the message replied with executing jlink.exe are

SEGGER J-Link Commander V3.10b ('?' for help)

Compiled Feb 9 2006 20:21:29

DLL version V3.10b,Compiled Feb 9 2006 20:21:16

Firmware : J-Link compiled Feb 8 2007 10:49:18 ARM Rev.5

Hardware : V5.40

S/N :15400606

OEM : IARKS

Vtarget - 0.000V

Speed set to 30 kHz

J-Link>

hg-chen · ‎2007-04-20

Posted on April 20, 2007 at 23:32

I measure the Jlink pin 19 (connect Jlink to PC USB) , but no 5V out put as it should be !?

any action to activate the Jlink pin 19 voltage output?

hg-chen · ‎2007-04-20

Posted on April 20, 2007 at 23:41

sorry for all the mess ,

the Jlink is mis connect to the AIN connector to cause the problem !