AN 100: In-System Programmability Guidelines

ID 683546
Date 9/22/2014
Document Table of Contents

1.4.3. Check the Voltage Levels of the Board During In-System Programming

Monitor the VCCINT or VCCA, VCC_ONE/VCC and VCCIO signal for all banks on your JTAG chain with an oscilloscope.

Set the trigger to the minimum level listed in the “Recommended Operating Conditions” table of the appropriate Device Family Datasheet. If a trigger occurs during in-system programming, the devices may need more current than is being supplied by the existing power supply. You can replace the existing power supply with one that provides more current.