i.MX Processors中的主题 Re: MMPF0100 I2C Programming

MMPF0100 I2C Programming

durmus — Fri, 16 Jan 2015 12:37:51 GMT

Hi Community,

Recently, I've received MMPF0100 parts with default configuration.

I need to change some outputs to use them with my custom i.MX6 board. Specifically, I need

- 1.35V from SW3 instead of 1.5V default value

- 1.2V from SW4 instead of 1.8V default value

- 2.5V from VGEN4 instead of 1.8V default value

And most importantly, I need these changes to be permanent.

I am very confused about this issue. Do I need OTP feature in order to achieve this or can I do this on-board with just normal I2C operation?

Thanks.

igorpadykov — Fri, 16 Jan 2015 14:57:49 GMT

Hi Durmuş

to be permanent, OTP fuses should be programmed, programming script examples

can be found on link below.

Also voltages may be changed by I2C operation, after power-up.

Best regards

igor

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sinanakman — Fri, 16 Jan 2015 15:25:46 GMT

Hi Durmus

In addition to what Igor suggests, to be able to

program the PMIC permanently, you need to

have the un-programmed version of the PMIC.

If you have a part that is preprogrammed you can

not change the values permanently. (Igor please

correct me if this is not correct).

A design alternative would be to have a preprogrammed

PMIC that mostly fits for the requirements and disable

the components that need different values. Then you

could change the values (e.g. SW3, SW4 and VGEN4

above) in your boot software. This way you can avoid

the additional process of programming your PMIC which

could make your manufacturing more complex.

Hope this helps

Regards

Sinan Akman