[quote user="Punit Chauhan"]Should i try adding a series resistor [a few tens of kOhms] on the input pin...[/quote]A series resistor will reduce the amount of current that will be supplied when powering up the device through an input. Not sure on the minimum amount of current that can power-up a MSP430 device. The thread MSP430F47187: Clamp diodes on terminals? suggests an alternative of: [quote user="Jens-Michael Gross"]A better way (if you're using digital signals) is a antiseries diode and a pullup resistor. It will allow the external circuitry to pull the pin down, and if it is not pulled down through the diode, it is pulled up to VCC (an dnot more) by the resistor. Make the resistor as high as possible to limit the current consumption if it is pulled low. Also, a low shortcut current will keep the voltage drop through the diode low and also allow the signal source to swing nearer to ground (the higher the current, the higher the low-voltage). Both together may not exceed the low voltage level threshold of the input pins.[/quote]
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