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The hardware connections to connect CYW943907AEVAL1F's JTAG with j-link are tabulated below:
The switches in SW4 on CYW943907AEVAL1F need to be closed to use an external JTAG. (By default the switches are open)
To Download the application, we need J-Link tool: Please download J-Link tool from SEGGER website and install it. As CYW4390x was not a part of the supported devices list of SEGGER J-LInk, we need to make use of flashloader tool from SEGGER to drive the sflash of CYW4390x. Please copy flashloader_CYW4390x_QSPI.elf as attached here to the Devices/Cypress/ folder in Segger Installation directory (should look something like this: C:\Program Files (x86)\SEGGER\JLink_V640\Devices\Cypress). Modify JLInkDevices.xml in the same directory for adding CYW4390x in support list.