2011-12-25 06:34 PM
I am a newbie for STM32F103. I want to download the program to my new pcb board. But I can't finish it, with the message ''Can't halt the core''.
Some possible reason here: 1. I set NTRST to ground. It's wrong? What function is for NTRST? 2. I don't connect oscillator. Oscillator is necessary when we want to download the program from JTAG?2011-12-26 07:26 AM
Hi,
NTRST pin is the reset of the JTAG TAP.It should be connected to the JTAG probe (ST-LINK, J-LINK ...).The external oscillator is not necessary for downloading.Cheers,Marwen2011-12-26 05:32 PM
Hi,Dear bm
Thanks for your help. In IEEE1149.1, TRST is optional, since that TMS can also reset TAP. So I don't know whether TRST is real reason. BR.