MachXO2: Pin A9 & C9 on the LCMXO2-2000HC-4BG256C were being used for signals in the design, can interruption of these signals cause the CPLD to reconfigure?
Pins A9 & C9 are dual purpose pins that are SCL & SDA for the I2C primary port on the LCMXO2-2000HC-4BG256C and have an absolute maximum rating of -0.25V and -0.3V. Please refer to note 5 of the 'Absolute Maximum Ratings' under the 'DC and Switching Characteristics' section of the MachXO2 datasheet. The interruption on the signals on these pins violated the specification and caused the MachXO2 to reconfigure.