Vybrid ProcessorsのトピックRe: Vybrid VBAT power issue

Vybrid VBAT power issue

ccarlos — Wed, 17 Jul 2013 15:13:33 GMT

On our boards with mounted PVF60GS151CMK40 Rev C2 and PVF61NN151CMK50 1N02G the VBAT pin consumes 1-2mA instead the 45uA from datasheet, if the main power is switched off. Also on our Tower board with CPU Test Rev A5 the current is ~90uA. Is there any issue?Does anyone else have this problem?

Needs any CPU internal block connected on VBAT a configuration to reduce this current (e.g. SRTC)?

We already set SOSC_EN to 1 on first start and OSC32K is working. Also RTC is running.

We dont measure any voltage on Tamper pins. Any idea to fix this?

Re: Vybrid VBAT power issue

naoumgitnik — Wed, 17 Jul 2013 22:05:33 GMT

Dear Carlos,

Thanks for your information; it is confirming data we have recently received from another source.

We are currently investigating this RTC power consumption issue quite critical for us.

Based on my experience, changing connections on the board or register settings usually do not help in such cases.

Best regards, Naoum Gitnik.

Hardware Systems and Applications Engineer

Microprocessors

Microcontroller Group

Re: Vybrid VBAT power issue

ccarlos — Mon, 05 Aug 2013 09:34:50 GMT

Dear Naoum,

any news on it?

best regards

ccarlos

Re: Vybrid VBAT power issue

naoumgitnik — Mon, 05 Aug 2013 16:08:52 GMT

Dear Carlos,

The design team is still investigating the reported issue; we are expecting their verdict within 2 weeks.

Best regards, Naoum Gitnik.

Re: Vybrid VBAT power issue

ccarlos — Wed, 21 Aug 2013 08:58:55 GMT

Because 2 weeks are gone: any news?

Re: Vybrid VBAT power issue

naoumgitnik — Mon, 26 Aug 2013 19:51:32 GMT

Dear Carlos,

Sorry for the delay.

It appears you are not alone - please, take a look at another thread (https://community.freescale.com/thread/308899).

Unfortunately, I cannot be specific as of when it will be done by the IC Design team.

Best regards, Naoum Gitnik.