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MYXPM6021*

Revision 1.1 - 10/21/14

*Advanced information. Subject to change without notice.

MYXPM6021*

Form #: CSI-D-685 Document 011

7.2 MYXPM6021 Power States

Followingisabriefdescriptionofthesestates:

• OFF:Nopoweratall.Theplatformcoincellhasnovalidpower.

• COIN:COINdomainispoweredandnotunderreset.Coindomainreferstoasmalllogicportioninside

MYXPM6021,whichgetsaresetsignalandsupplyfromthecoincellorasupercap.Theselogicregistersretaindata

whenMYXPM6021supplyfailsorPMICgoesunderthePOR.Theseregisteraresittingontheanalogside.TheCOIN

stateisnotrelatedtoanyoperationinthePMICandisnotcoded.Itrepresentsjustapossiblesupplyscenario.

• RESET:ThedigitalcorewhichisnotsuppliedfromtheCOINisunderPORduetothefactthattheVSYSinputhas

notcrossedyetthePORreleasethreshold.

• OTP:JustafterPORisreleasedMYXPM6021goesintoOTPstateandreadstheOTP.Inthisstateallthetrimming,

calibration,powersequencing,andplatformvariantdataisreadandcopiedintotheoperationalregisters.Thisstateis

crossedonlyduringrstpoweruporwhenMYXPM6021isforcedbyPORorsoftresettogobackintoRESETstate.

• EEPROM:Fordebuggingpurposeorasafallbacksolutionintheeldit’spossibletooverwritetheoperational

registersviaanexternalEEPROM.ThisstepisalwaysperformedfromMYXPM6021aftertheOTPstateandisdone

onceduringrstpowerupiftheEEPROMcontains.ItisassumedthattheEEPROMissuppliedatthetimeofthe

access.

• G3:Thisstatecorrespondstoanon-validsystemsupplyVSYS(VSYS<VSYSREF=3.0V).VSYSisnotconsidered

tobegoodenoughforbooting.

• SOC_G3:Thisisbydenitionthe“systempowerdown”state.Applicationwillbemainlyloopingbetweenactive

stateandthisstate.VSYSvalideventmakesthePMICgoingfromG3toSOC_G3state.Criticaleventsandpower

buttoncanleadthePMICtothisstate.Onlyinthisstateitispossibletobesensitivetotheexternalwakeupevents.

Figure 3: MYXPM6021 power up states

MYXPM6021willissueanundervoltageagwhenVSYSwillfallbelowthe2.7Vthreshold.Inthiscaseashutdownwillbe

executedbringingdownallrailsinanorderedfashion.ThenalstatewillbeG3.

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