Connecting To Different J-Links Via Usb - Segger J-Link User Manual

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If you choose the USB identification method "User assigned SN", you must also enter
a valid, customized serial number which is used to identify the selected emulator.
Please note that the serial number 123456 is not valid. Moreover, the maximum
value for a valid serial number is 4294901759 (0xFFFEFFFF).
3.5.3

Connecting to different J-Links via USB

When connecting to a J-Link it is not necessary to pre-select the J-Link, since when
connecting via USB without specifying to which J-Link you want connect to, the DLL
searches for available J-Links. If more than one J-Link has been found, a emulator
selection dialog is shown, which enables you to select the correct one.
So even in IDEs which do not have an selection option for the J-Link, it is possible to
connect to different J-Links.
J-Link / J-Trace (UM08001)
CHAPTER 3
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Setup