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Forum Index : Microcontroller and PC projects : Quick CS question...

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Grogster

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Joined: 31/12/2012
Location: New Zealand
Posts: 9593

Posted: 12:10am 22 Feb 2016

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With SPI devices, is it correct to assume that all CS lines are the same in that they are normally tied HIGH, and pulled LOW when selected by the MCU - correct?

In my case, I have a few spare 2.4" LCD's with touch. I want to permanently select the LCD, and permanently disable the touch.

With that in mind, my brain is suggesting that to do this, I would connect the LCD CS to ground permanently, and the touch CS high permanently. This would enable the LCD, and permanently disable the touch controller - yes?

Just need to make sure I am understanding this correctly, as the MM normally handles the CS pins for me.

Smoke makes things work. When the smoke gets out, it stops!

Frank N. Furter
Guru

Joined: 28/05/2012
Location: Germany
Posts: 947

Posted: 12:17am 22 Feb 2016

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Hi Grogster,

that should be ok! CS is normally low active and you are right!

Frank

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