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SCI TXI Interrupts Not Generated

Last Updated:07/04/2018

Question:

SCI TXI interrupts are not generated. What could be the reasons and how to fix it?

Answer:

Please check the following items.

 (1) Make sure that the SCI module stop bit is released.
For products with the write protection function, release the write protection before writing the module stop bit.

(2)Check the ICU IEN register, IPR register, IR register, CPU "I" flag, and SCI SCR register.

(3) Make sure that the SCR.TIE/SCR.TE bit setting procedure is executed as described in the manual.

Suitable Products
RX Family
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