AnsweredAssumed Answered

i.MX6SDL power supply on the time change LDO enable or bypassed mode.

Question asked by Satoshi Shimoda on Sep 25, 2014
Latest reply on Sep 26, 2014 by igorpadykov

Hi community,

 

Our partner have some questions about i.MX6SDL.

Please see Table 9 in IMX6SDLCEC Rev.3, and please see their questions as below.

 

[Q1]

If change i.MX6SDL from LDO enabled up to 996Mhz -> LDO bypassed up to 966MHz, PMIC output cannot satisfy i.MX6SDL operating range because there is no overlap between the operating range of these two modes.

So we guess if we want to change from LDO enable to LDO bypassed, we should do the following procedure.

Is this correct?

 

1. Change PMIC output from LDO enabled up to 996MHz -> LDO enabled up to 792MHz.

2. Change i.MX6 from LDO enabled to LDO bypassed.

 

 

[Q2]

Can we use the following procedure to change i.MX6 from LDO enabled to bypassed even though PMIC output over the operating range of LDO bypassed for just a moment?

 

1. Change PMCI output from LDO enabled up to 996MHz -> LDO bypassed up to 996Hz.

2. Change i.MX6 from LDO enabled to LDO bypassed.

 

 

[Q3]

PMIC output for VDD_SOC_IN will be out of operating range on the time change from i.MX6 LDO enabled to LDO bypassed.

It is not avoidable because operating range of VDD_SOC_IN is not changed by CPU frequency.

Is the out of operating range no proglem on the time changing LDO mode?

 

 

Best Regards,

Satoshi Shimoda

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