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UCD3138ACCEVM149: cannot read any of the registers of DTC controls in UCD3138A

Part Number: UCD3138ACCEVM149
Other Parts Discussed in Thread: UCD7138


I am using UCD3138ACCEVM to controll a LLC circuit which made by us.

To make the [LLCHBFirmware-1.2] to work, I emptyed the content of the  funtion [void standard_interrupt(void)].

Then I modified the code, acktually it can run simplely.

while I want to enable the DTC to work with UCD7138, there is a trouble. as shown in the following picture, I cannot read any of the registers of DTC controls, an error emerged.

would you please tell me about the possible reason?

thank you very much.

Xiaofeng Wu