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Enabling JTAG comms on the UCD3138 series

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2016년 3월 14일
On startup, checksum tests are executed by the boot ROM code to verify the integrity of the program flash contents. If any tests pass, JTAG comms are disabled by the boot ROM code before control is relinquished to the firmware in program flash. This tutorial shows the line of code that you need to insert in your firmware to re-enable JTAG comms and the modification available via PMBus to the IOMUX register on the UCD device to re-enable JTAG comms. 

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