TI TMS570Lx
The J-Link DLL must be informed about the correct device (e.g. TMS570LS3137) because for the TMS570LS series a special connect sequence must be realized so the ICEPick will be configured correctly and a stable connection to the target device can be established.
Generally IDE's (e.g. Code Composer Studio, ATMEL Studio...) assign the device name automatically to the J-Link DLL. The J-Link Commander needs the device to be assigned by the user. This can be done for example per command line input. A command line can look like this:
JLink.exe -device TMS570LS3137 -if JTAG -speed 4000