Welcome in the forum, Anand.
There are 3 stages for PSoC4 GPIO pins during power-up:
- Until the minimum voltage reached (1.8V) the outputs are undefined.
- Outputs go High-Z until programmed during boot
- Outputs follow the programming
To keep the pins to a defined state during the High-Z phase you will need some resistors to force the states to whatever you want.
Thank You Bob,
But when checked the data sheet the reset option tab for GPIO pin is only applicable for PSoC 3 and PSoC5, and I am using PSoC4, Is there any other way to configure it.
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No option for PSoC4, use resistors.