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[ 3 posts ] |
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CaramDude
Joined: 02 Jul 2014, 20:31
Posts: 5
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Hi everybody, I just purchased a Carambola 2 but I'm having trouble figuring out the GPIO voltage levels. The development board shows the provided push button (GPIO11) is ACTIVE LOW 3.3V
But reading the datasheet and forums, its seems all the I/O is 2.5V.
Are the inputs 3.3V, 5V tolerant? is there level shifting on GPIO11 or some of the I/O on the Carambola 2 board?
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| 02 Jul 2014, 20:49 |
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Giedrius
Joined: 11 Jun 2014, 14:45
Posts: 135
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Hi,
Carambola GPIO outputs are 2.5V. If you want a higher output you will need a level shifting circuit. The inputs are 3.3V tolerant, but with a correct resistor divider you can interface higher voltages too.
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| 03 Jul 2014, 08:11 |
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CaramDude
Joined: 02 Jul 2014, 20:31
Posts: 5
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Perfect, thx for the reply
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| 03 Jul 2014, 14:39 |
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