i.MX6S PMU_REG_CORE reset value

[sugiyamatoshihi]

Hi, 

I'd like to know about PMU_REG_CORE value.

According to reference manual, its register value is 0x00402010. The value of REG0_TARG is 0x80 means  core voltage is 1.1V. It doesn't meet 1.125V at 792MHz min voltage as default. Then I read the register value just after reset, the register value is 0x12 that means 1.150V. It is meet the spec.

Does it means typo of reference manual or boot rom change it?

I checked u-boot, but it changed another value  0x004c0012.

Best Regards,

Sugiyama

[sugiyamatoshihi]

Hi, 

I checked the other reference manual of i.MX6 series.

i.MX 6DQP           PMU_REG_CORE=0x00482412  REG1 is for VPU/GPU

i.MX 6DQ, 6SDL  PMU_REG_CORE=0x00402010  REG1 is for VPU/GPU

i.MX 6SX              PMU_REG_CORE=0x00482012  REG1 is for PCIe 

I suppose the reset value of PMU_REG_COREis typo, since reference manual of i.MX 6DQ,SDL didn't update.

Is my guess correct?

Best Regards,

Sugiyama

[igorpadykov]

Hi Sugiyama

yes your guess is correct, this is typo in reference manual.

Best regards
igor
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[sugiyamatoshihi]

Hi, Igor,

Thank you for your answer.

 I understood default value  PMU_REG_CORE=0x00482412 for i.MX6DQ and SDL was correct.

Best Regards

Sugiyama