i.MX ProcessorsのトピックRe: MPF0100F0ANES pmic not replying on i2c

MPF0100F0ANES pmic not replying on i2c

angelo_d — Thu, 15 Oct 2015 08:28:42 GMT

Hi all,

did a small linux tool for i2c, and (unless i have no bugs, that shouldn't be since all other devices in the bus are detected correctly) looks like the PMIC is not replying. It should reply at a 0x08 address, or near it.

We should need to control some voltage so if possible i would understand what is wrong here.

Reagrds

Angelo

Re: MPF0100F0ANES pmic not replying on i2c

igorpadykov — Fri, 16 Oct 2015 01:56:14 GMT

Hi angelo

one can check i2c iomux settings and if SION bit is set in

IOMUXC_SW_MUX_CTL register. As for PMIC, to communicate with I2C,

VIN must be valid and VDDIO, to which SDA and SCL are pulled up, must be

Best regards

igor

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Re: MPF0100F0ANES pmic not replying on i2c

angelo_d — Fri, 16 Oct 2015 08:15:47 GMT

Hi igor,

thanks,

i have several devices in the bus, working properly. Only PMIC is not responding, so i would exclude any imx6q pinmux issue.

VIN is 3V3, VDDIO is 3v3.

Is it possible some of this chip are programmed on OTP without i2c enabled ?

Regards

Angelo

Re: MPF0100F0ANES pmic not replying on i2c

igorpadykov — Fri, 16 Oct 2015 09:15:46 GMT

Hi angelo

i2c can not be disabled. Is this one chip or several,

had you checked signals with oscilloscope?

Best regards

igor