Keil Logo

ULINK: Connection Issues With Ulink and XC161 AC Step

Information in this article applies to:

  • ULINK USB-JTAG Adapter
  • ULINK2 USB-JTAG Adapter


I am having trouble connecting to an XC161 (AC Step) with Keil ULINK USB-JTAG Adapter. The link is working with an Infineon XC161 Starter Kit (AB Step).


In many cases, this is caused by one of the following circuit problems:

  • Pull-up resistors on the OCDS interface should be 100KOhm. Refer to Debugging with XC16x for more information.
  • External reset logic sometimes confuses the power-up sequence generated by ULINK. We recommend that you bypass ICs that could interfere with the Reset Signal from OCDS to the XC16x device.
  • The Connector Pinout drawing in the manual marks VDD as optional. However, supply voltage should be available. If your board does not provide VDD on this pin you may set the VDD jumper inside ULINK to +3.3V and ULINK will provide it for you.



Last Reviewed: Friday, January 15, 2021

Did this article provide the answer you needed?
Not Sure
  Arm logo
Important information

This site uses cookies to store information on your computer. By continuing to use our site, you consent to our cookies.

Change Settings

Privacy Policy Update

Arm’s Privacy Policy has been updated. By continuing to use our site, you consent to Arm’s Privacy Policy. Please review our Privacy Policy to learn more about our collection, use and transfers
of your data.