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PSoC 5, 3 & 1 MCU

BrCo_1547486
New Contributor II

Hello all,

I am currently working with the PSoC 5LP on the Cy8ckit-059 evaluation board. I am looking to drive the output of the GPIO pins with a logic high of 1.8V. I tried to adjust all the VDDIOx values to 1.8V in the Design Wide Resources, but this failed to change the output level of the GPIO pins regardless of the VDDIOx value or pin drive mode. Is this GPIO voltage change in VDDIOx possible with the Cy8ckit-059?

I would do this with the SIO enabled pins, but my final design will require all the available GPIO pins to operate at 1.8V so there are not enough SIO pins available.

I have attached the project of my current test configuration to this post.

Thank you!

-Brian

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1 Solution
Bob_Marlowe
Expert II

See schematics of the -059 kit:

Remove R15

Supply VDDIO at J1 pin 26 with 1.8V

Bob

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2 Replies
Bob_Marlowe
Expert II

See schematics of the -059 kit:

Remove R15

Supply VDDIO at J1 pin 26 with 1.8V

Bob

View solution in original post

BrCo_1547486
New Contributor II

Thak you Bob!

I have two followup questions to this then. When I supply VDDIO at J1 pin 26 with my desired voltage, am I correct in noting that this will set all VDDIOx voltages to the same value supplied at J1 pin 26?

Also, in my reading through the various documentation for the PSoC 5LP, it sounded like the VDDIO voltages could be set internally without using an external source (or onboard VDAC) supplying the voltage. Is this at all the case?

Thanks!

Brian

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