How to set PMU_REG_COREn n=0,1,3,4 ?

[yutakanomura]

Dear all

I use i.mx6Q (Part numbers D)  and have a Question about " 50.7.4 Digital Regulator Core Register".

PMU_REG_COREn :

Address: 20C_8000h base + 140h offset + (4d × i), where i=0d to 3d

That is...

① 0x020C8140

② 0x020C8144

③ 0x020C8148

④ 0x020C814C

But,

I can set value to ①and② , but I can't set the values to ③and④.

I set the value to ①、then ②,③and④ register is set to the same value as ①.

Is this  a correct setting to set the only ① register ? 

Thanks for your help,

Nomusan

[yutakanomura]

Thank you ,Igorpadykov.

 There is additional information.

　Look at the following differences,please.

-Processor Reference Manual Rev.3.

PMU_REG_COREn Address: 20C_8000h base + 140h offset 

 -Processor Reference Manual Rev.4     

PMU_REG_COREn Address: 20C_8000h base + 140h offset + (4d × i), where i=0d to 3d

Three addresses have been added from the new revision.

 I can read register value each of them, but I can write only ① and ② address.

Actually, if I set one, all four have the same value.

Do you think that one setting is enough and that it is a mistake to set four?

[igorpadykov]

Hi yutaka

seems there is one ldo as described in sect.50.2 Digital LDO Regulators

i.MX6DQ Reference Manual :

"The three digital regulators are known as LDO_ARM, LDO_PU, and LDO_SOC."

check also power connections in Figure 50-1. Power system overview

http://www.nxp.com/docs/en/reference-manual/IMX6DQRM.pdf

Best regards
igor
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[Renzinan]

Hi, igor and yutaka

I met a same issue. 

Can different voltage values be applied to different CPU core? Alternatively, even if I can configure 4 registers of PMU_REG_CORE, actually only the first register takes effect?

Thanks and Regards

Zinan