topic Re: STOP mode in MC9S12ZVML in S12 / MagniV Microcontrollers

STOP mode in MC9S12ZVML

xiaofangu — Tue, 06 Feb 2018 08:31:39 GMT

Hello

My Motor project uses LIN as Communication Bus based on MC9S12ZVML,And I use the IRC to generate the clock.Now,I want to put the micro in stop mode.

When the MCU enters STOP(I check the ECLK,and there's no frequece), the current is nearly 3mA,so what else may consume the current?

In addition,Can LIN wake up the MCU when in stop mode?

Any help will be appreciated!

Best regards,

xiaofan

Re: STOP mode in MC9S12ZVML

danielmartynek — Tue, 06 Feb 2018 16:18:02 GMT

Hi,

Please see 2N95G and 1N95G errata depending on your device.

e8188 ADC: High current in Stop Mode.

It can be up to 1mA per ADC instance. There is workaround available.

Yes, the LIN PHY can pass wake-up event to SCI module.

Regards,

Daniel

Re: STOP mode in MC9S12ZVML

xiaofangu — Wed, 07 Feb 2018 10:21:20 GMT

Hi,Daniel

Glad to hear your response.

I'm still confused,as in full STOP mode,the bus clock is stopped, the sci can still work?

Regards,

xiaofan.

Re: STOP mode in MC9S12ZVML

danielmartynek — Wed, 07 Feb 2018 17:55:22 GMT

Hi Xiaofan,

No, the SCI module does not work in Stop mode.

The module wakes up on active edge.

If the wake-up feature is enabled and if the LIN Bus pin is driven with a dominant level longer than tWUFR followed by a rising edge, the LIN Physical Layer sends a wake-up pulse to the SCI, which requests a wake-up interrupt. (This feature is only available if the LIN Physical Layer is routed to the SCI). (Chapter 19.1.2 of the S12ZVM RM).

Regards,

Daniel

Re: STOP mode in MC9S12ZVML

xiaofangu — Thu, 08 Feb 2018 07:35:56 GMT

Hello,Daniel

Thanks for your reply,Now my problem's gone!

Best Regards,

xiaofan