Run CY8CKit in 3.3V logic while still having Kitprog plugged in

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AmCi_3754291
Level 2
Level 2

Hey,

I want to be able to use 3.3V logic on my I2C lines of CY8Ckit-059, however I still want to be able to have my KitProg plugged in and get data from it and continue to be able to program my PSOC. Is this possible? How do I do it?

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MotooTanaka
Level 9
Level 9
Distributor - Marubun (Japan)
First comment on blog Beta tester First comment on KBA

Hi,

Note: Dear /odissey1-san, please correct me if I'm wrong

SDA pin and SCL pin are configured as open-drain, so it will not be driven to High (5V).

So "IMHO", as far as you connect only SDA, SCL and GND to CY8CKIT-059 and

you pull-up SDA and SCL lines with 3.3V, the 3.3V logic group will be fine and

PSoC can access I2C without destroying the 3.3V logic group.

moto

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