GPIO Input Voltage Spec at 3.3V and 5V | Cypress Semiconductor
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GPIO Input Voltage Spec at 3.3V and 5V
What are the specified digital input voltages for the GPIOs of PSoC1, when operating at 3.3V?
The input voltage specifications for GPIO are same for 3.3V and 5V. Please refer to the electrical specifications in device datasheet of the concerned device for the exact value.
All GPIO CMOS inputs and TTL compatible.