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Newbie
Newbie
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Registered: ‎06-23-2020

XCZU19EG board , JTAG cannot scan to ARM_DAP

The XCZU19EG board designed by yourself, after the power is turned on, JTAG cannot scan to ARM_DAP, and it will become a dummy_dap, as shown in the following figure. There is no problem with the power supply voltage, PS_POR_B and PS_SRST_B have been pulled high. PS_REF_CLK is a 50MHz clock. PS_ERROR_OUT is pulled low. What is the reason for this situation, and what places need to be tested?

微信图片_20200624095935.png
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