I am working on the configuration for a product using the CY7C65215A and have a question regarding the GPIO.
The device is using both SCB0 (SPI) and SCB1 (I2C) and all other GPIO are unused.
The unused GPIO can be configured as either: 'Tristate', 'Drive 1', 'Drive 0', or 'Input'.
I have found a Knowledge Base article that states that the GPIO when configured as 'Input' need to be pulled to a defined state, but what about Tristate?
When set as Tristate the output is disconnected, but is the input function of the GPIO kept in a defined state or does it also require an external pull-up/down?
When using the GPIO as tristate, the pin can be left floating if not used.
The pin voltage will still be indeterminate.