CY7C65215A GPIO Tristate

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bemc_4809516
Level 1
Level 1

Hi,

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?

Thanks.

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YatheeshD_36
Moderator
Moderator
Moderator
750 replies posted 500 replies posted 250 solutions authored

Hello,

When using the GPIO as tristate, the pin can be left floating if not used.

The pin voltage will still be indeterminate.

Thanks,

Yatheesh

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YatheeshD_36
Moderator
Moderator
Moderator
750 replies posted 500 replies posted 250 solutions authored

Hello,

When using the GPIO as tristate, the pin can be left floating if not used.

The pin voltage will still be indeterminate.

Thanks,

Yatheesh

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