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Expansion header: Can the i2c of expansion header pin be customize using

Former Member over 10 years ago

Because I want to use i2c interface to control others device for expansion header pin on cirrus logic audio card. so the i2c interface be using?

Terry

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0 screamingtiger over 10 years ago

You cant change it, they have pull up resisters on them so you cant toggle them low in software. Only sink them low.

The SDA/SCL pins are hardware based which is a good thing, but a bad thing in that they are not really GPIO pins.
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0 screamingtiger over 10 years ago

You cant change it, they have pull up resisters on them so you cant toggle them low in software. Only sink them low.

The SDA/SCL pins are hardware based which is a good thing, but a bad thing in that they are not really GPIO pins.
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0 Former Member over 10 years ago in reply to screamingtiger

Because I want to use ADC component(ADS1015) to read analog signal, and it is i2c interface to communicate with main borad.
So if the ADC component device can met pull up this voltage, it should be driving by SDA and SCL for porting driver on raspberry pi 2?
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