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kl02z SACKERR condition

Question asked by Don Weier on May 4, 2015
Latest reply on May 4, 2015 by Don Weier



     I'm trying to work through a problem I'm having with the kinetis kl02z32vfg4. I'm trying to implement low power by operating in VLPR(which is working fine) and entering VLPS when there are no tasks for the mcu to complete. The problem I'm having is this: whenever I strobe the WFI instruction, there is a reset condition. By checking the RCM_SRS1 register I'm able to see that the reset source is a Stop Mode Acknowledge Error. I did some searching around on the forums and found this thread: K10 SACKERR reset occur after executing an WFI instruction but even after removing the bus clock to the SPI, I2C, TPM, and PORT modules and delaying several clock cycles before calling WFI, I'm getting the reset with the SACKERR flag set. I'm wondering if there's something I'm missing. Are there other peripherals that can cause the error? Is there a way I can see which module is failing to acknowledge the STOP instruction?


Thank you all for any help that you can give me,