Regarding recommended series resistance of Capsense SPI interface.

[YuMa_1534086]

Q1)

Could you please let us know recommended series resistance of Capsense SPI interface?

Is it 330ohm?

Q2)

Should series register be added to all SPI interface(miso, mosi, sclk, ss)?

Best Regards.

[Anonymous]

>Q1)

I'm sorry. I could not understand the meaning of the question.

Is CapSense's question? Or is it an SPI question?

>Q2)

If you have not read this SCB Component datasheet yet, please read this datasheet.

http://japan.cypress.com/documentation/component-datasheets/psoc-4-serial-communication-block-scb

[YuMa_1534086]

Below is figure of capsense design guide(AN64846).

Cypress recommends 330 ohm for I2C series resistance value.

I would like to confirm recommended series resistance value when communication is SPI.

[Anonymous · Accepted solution]

Yes, it is recommended to connect 330 ohm resistor even for SPI.

[YuMa_1534086]

Should series register be added to all SPI interface(miso, mosi, sclk, ss)?

[Anonymous]

Yes, you are right.