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J-LINK can not connect Imx8qxp-CM4 through JTAG

Question asked by meng zhu on Dec 5, 2018
Latest reply on Dec 5, 2018 by meng zhu


I want debug imx8qxp-cm4 using J-link ,but J-link can not find the device.

i am sure the SEGGER patch is installed(

i run J-link commander(use JTAG) ,the result is:

when i use cJTAG,the result is:

i measure the TDO pin without connecting anything ,it is 0.8V .when connect J-Link, it is 0V.