Davin, I'm glad to hear that you can use ACLK as a workaround. Does the issue exist if you don't use DIVA2 and set UCB1BR0 to 60? You may have the option of using LPM3 for less power consumption if you output ACLK on P2.0 or P5.6 for the LDC reference. I would still be curious to see if the system operates properly at a Vcc far above the minimum, like 3 to 3.6 V. Regards, Ryan
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