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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

VDCINFalling(DisconnectionEvent)

WhentheVDCINlevelatthecomparatorbecomeslowerthanthereferencevoltage(includingfallingedgehysteresis),

VDCINisconsideredinvalid.IftheVDCINDBENbitissetintheVDCINDETCTRLregister,VDCINmustbesensedasinvalid

forthefull100msde-bouncetimebeforetheSDCINDETbitintheSPWRSRCIRQregisteriscleared,indicatingcharger

disconnection.IfVDCINDBENiscleared,SDCINDETisclearedimmediatelyuponVDCINbecominginvalid.

OnanychangeintheSDCINDETbitintheSPWRSRCIRQregister(setorclear),thecorrespondinginterruptag,DCINDET,

issetinthePWRSRCIRQ2nd-levelinterruptregister.ThisautomaticallysetsthePWRSRCinterruptagintheIRQLVL1

interruptregister,andalertstheSOC.TheSOCisexpectedtoquerytheSDCINDETbitinSPWRSRCIRQtodetermineif

theeventwasaconnectionordisconnection.

Table 48: VDCIN Detection, Analog Electrical Parameters

Parameter Symbol Min Typ Max Unit

VDCIN Rising Threshold (VDCIN: L->H) VDCINREFH 895 940 990 mV

VDCIN Falling Threshold (VDCIN H->L) VDCINREFL 810 860 900 mV

Debouncing 90 100 110 ms

12.5 BATLOW Denition

Oncedetectionisdone,accordingtothesupplyconguration,theADCwillbetriggeredtomeasuretheVBATvoltage.

TheresultregisterwillbecomparedwithoneofthefourpossiblethresholdlevelsdenedtogeneratetheBATLOWsignal.

Thisisneededinordertodecideifthesystemcanbootornot.Thebelowgureshowsthelevelsandtheexplanationfor

thedifferentLOWBATlevels.

Figure 36: Valid Battery Thresholds

• LOWBAT:Nosupplysourcedetectedapartfromthemainbattery.

• LOWBATSDP:VBUS_SENSEdetectedandUSBisoftheSDPtype.

• LOWBATDCP:VBUS_SENSEdetectedandUSBisoftheDCP,CDPorACAtype.

• LOWBATDC:VDCIN_SENSEisdetectedsoanACadapterisconnected.

Aftereverybatterymeasurementtheresultwillbecomparedwiththecorrespondingthresholds.Ifthesystemisrunning

onAC/DC plug or USB supplytheVBAT input voltageismeasuredfrequently withthe ADC. If the leveldropsbelow

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ADC 6021 Specifiche Pagina 76