Question about Macbook power states

[Askaleto]

Hello guys,

I have a question about different power states of the Macbook. I understand what they are and I understand that all of them up to (and including) xxx_S0 must be at correct voltages.
Now, If I close the lid, the system goes to sleep and enters state S3, does it mean that all _S0 voltages are going to 0V?

Thank you!

 

[2informaticos]

When PM_SLP_S3_L goes down (asserted/enabled), no S0 voltage is possible.
Keep in mind, PM_SLP_S3_L is used to enable S0 state.

 

[Askaleto]

Yes it is interesting to see that S3 is used t create enable signal for S0, but actual S0 voltage is created from S5 state.

 

[2informaticos]

I don't understand your logic...

Board MUST pass through S3, to arrive at S0.
If all voltages derive from an S5 power line, doesn't mean that come from S5 state!
Because you should understand enable sequence of the signals.

 

[piernov]

ACPI power states - LogiWiki

We have Apple MacBook and iPhone Diode readings and general fault finding information compiled by the leaders in this area

logi.wiki

 

[Askaleto]

I'm sorry, I wasn't clear enough in my previous post.
What I want to say is that according to the schematics, PP3V3_S0 is created from PP3V3_S5 when signal P3V3S0_EN is high, and this enable signal is directly derived from PM_SLP_S3_BUF_L/PM_SLP_S3_R_L after 0 Ohm resistor (essentially fuse). _S5 means that this voltage is present even if laptop is turned off (software shutdown). I know that S0 voltages must exist after all previous _S3 and _S4 are created successfully. I thought PP3V3_S0 will be created directly from PP3V3_S3, but this is not the case, it is created from S5 voltage but only after S3 voltage is present (which is used as Enable signal).