UCD92xx PMBus Command Reference

1 User'sGuideSLUU337 August2008 UCD92xxDigitalPWMS ystemControllerPMBusCommandReferenceTheU CD92xxfamilyofdigitalpowercontrollersupp ortsawiderangeofcommandsthatallowanexter nalhosttoconfigure,control, ,Quantization, (00h) (01h) (04h) (11h) (12h) (20h) (38h) (3Ah) (3Bh) (41h 69h) (66h) (80h) (81h) (82h) (8Dh) (8Eh) (D0h)SEQ_TIMEOUT(MFR_SPECIFIC_00).. (D1h)VOUT_CAL_MONITOR(MFR_SPECIFIC_01).. (D2h)PHASE_INFO(MFR_SPECIFIC_02).. (D3h)VIN_SCALE_MONITOR(MFR_SPECIFIC_03). . (D4h)CLA_BANK(MFR_SPECIFIC_04).. (D5h)CLA_GAINS(MFR_SPECIFIC_05).. (D6h)PAGE_ISOLATED(MFR_SPECIFIC_06).. (D7h)EADC_SAMPLE_TRIGGER(MFR_SPECIFIC_07 ).. (D8h)ACTIVATE_CLA_BANK(MFR_SPECIFIC_08). . (D9h)ROM_MODE(MFR_SPECIFIC_09).

2 17 SLUU337 (DAh)USER_RAM_00(MFR_SPECIFIC_10).. (DBh)SOFT_RESET(MFR_SPECIFIC_11).. (DCh)IIN_SCALE_MONITOR(MFR_SPECIFIC_12). . (DDh)THERMAL_COEFF(MFR_SPECIFIC_13).. (DEh)PHASE_ENABLE(MFR_SPECIFIC_14).. (DFh)DRIVER_MIN_PULSE(MFR_SPECIFIC_15).. (E0h)MIN_DUTY(MFR_SPECIFIC_16).. (E1h)SYNC_IN_OUT(MFR_SPECIFIC_17).. (E2h)PARM_INFO(MFR_SPECIFIC_18).. (E3h)PARM_VALUE(MFR_SPECIFIC_19).. (E4h)TEMPERATURE_CAL_GAIN(MFR_SPECIFIC_2 0).. (E5h)TEMPERATURE_CAL_OFFSET(MFR_SPECIFIC _21).. (E6h)TRACKING_SOURCE(MFR_SPECIFIC_22).. (E7h)TRACKING_SCALE_MONITOR(MFR_SPECIFIC _23).. (E8h)FAN_SPEED_FAULT_LIMIT(MFR_SPECIFIC_ 24).. (E9h)LOGGED_PEAKS(MFR_SPECIFIC_25).. (EAh)LOGGED_FAULTS(MFR_SPECIFIC_26).. (EBh)LIGHT_LOAD_LIMIT_HIGH(MFR_SPECIFIC_ 27).

3 (ECh)DEVICE_ID/ROM_VER(MFR_SPECIFIC_28). . (EDh)LIGHT_LOAD_CONFIG(MFR_SPECIFIC_29). . (EEh)PREBIAS_OFFSET(MFR_SPECIFIC_30).. (EFh)PREBIAS_GAIN(MFR_SPECIFIC_31).. (F0h)EXECUTE_FLASH(MFR_SPECIFIC_32).. (F1h)MFR_SETUP_PASSWORD(MFR_SPECIFIC_33) .. (F2h)DISABLE_SECURITY(MFR_SPECIFIC_34).. (F4h)MFR_SECURITY_BIT_MASK(MFR_SPECIFIC_ 36).. (F3h)GPIO_SEQ_CONFIG(MFR_SPECIFIC_35).. (F5h)TEMP_BALANCE_IMIN(MFR_SPECIFIC_37). . (F6h)LIGHT_LOAD_LIMIT_LOW(MFR_SPECIFIC_3 8).. (F7h)FAST_OC_FAULT_LIMIT(MFR_SPECIFIC_39 ).. (F8h-FBh)Undefined(MFR_SPECIFIC_40-43).. (FCh)EADC_TRIM(MFR_SPECIFIC_44).. (FDh)DEVICE_ID(MFR_SPECIFIC_45).. (D2h)PHASE_INFO(MFR_SPECIFIC_02)..4011 (D4h)CLA_BANK(MFR_SPECIFIC_04).. (D5h)CLA_GAINS(MFR_SPECIFIC_05).

4 (D8h)ACTIVATE_CLA_BANK(MFR_SPECIFIC_08). . ,thisdocumentisPMBusPowerSystemManagemen tProtocolSpecificationPartII CommandLanguage, , , , ,thisexponentisaread-onlyparameterwhosev alueisfixedat , 2^X,whereVoltageistheparameterofinterest ,involts,Visa16-bitunsignedbinaryinteger mantissa, :ThePMBusstandardassumesthatalloutputvol tagesareexpressedaspositivenumbers,soall parametersrelatedtooutputvoltageareunsig nedintegers, , , , ,twos-complementmantissaanda5-bit, :R=Y 2^X,WhereRistherealworldvalue,Yisan11-bi t,signed2s-complementbinaryintegermantis sa, ,Quantization, ~33E6downto~ (largervalueshavecoarserresolution) ,Linear,todescribeboththe16-bit+exponent formatusedforthevoltage-relatedparameter saswellasthe11-bit+ , , ,withtheirinherentquantization.

5 , ValueshardcodedintoanICdesign(ifany), Valuesprogrammedfromhardwarepins(ifany), Anon-volatilememorycalledtheDefaultStore (ifsupportedinthedevice), Anon-volatilememorycalledtheUserStore(if supportedinthedevice),or , , , , , , (s) (s) [Units]00hPAGER/WByteByteCommon01hOPERAT IONR/WByteBytePAGE02hON_OFF_CONFIGR/WByt eBytePAGE03hCLEAR_FAULTSS endbyten/aCommonWRITEONLYS imilartoPAGE commandforphase-related04 [V]PAGE(LinearMode),andtheexponentisfixe dat [V]PAGE22hVOUT_TRIMR/WWordLINEAR16[V] (continued)TransactionDataFormatCodeComm andScopeCommentType[Units]23hVOUT_CAL_OF FSETR/WWordLINEAR16[V]PAGES igned24hVOUT_MAXR/WWordLINEAR16[V]PAGE25 hVOUT_MARGIN_HIGHR/WWordLINEAR16[V]PAGE2 6hVOUT_MARGIN_LOWR/WWordLINEAR16[V]PAGE2 7hVOUT_TRANSITION_RATER/WWordLINEAR11[V/ ms]PAGE28hVOUT_DROOPNOTSUPPORTED29hVOUT_ SCALE_LOOPR/WWordLINEAR11[V/V]PAGE2 AhVOUT_SCALE_MONITORR/WWordLINEAR11[V/V] PAGE2Bh-2 FhReserved30hCOEFFICIENTSNOTSUPPORTED31h POUT_MAXNOTSUPPORTED32hMAX_DUTYR/WWordLI NEAR11[0-100]PAGE33hFREQUENCY_SWITCHR/WW ordLINEAR11[kHz]PAGE34hReserved35hVIN_ON R/WWordLINEAR11[V]Common36hVIN_OFFR/WWor dLINEAR11[V]

6 Common37hINTERLEAVENOTSUPPORTEDLINEAR11 PAGE&38hIOUT_CAL_GAINR/WWordCurrentSense Gain[mV/A m ]PHASEPAGE&39hIOUT_CAL_OFFSETR/WWordLINE AR11[A]PHASEOnlyFan1supported,onlyinduty -cycle3 AhFAN_CONFIG_1_2 (0-100%)RPMC ommand3 BhFAN_COMMAND_1R/WWordLINEAR11[%]Commonm odenotsupported3 ChFAN_COMMAND_2 NOTSUPPORTED3 DhFAN_CONFIG_3_4 NOTSUPPORTED3 EhFAN_COMMAND_3 NOTSUPPORTED3 FhFAN_COMMAND_4 NOTSUPPORTED40hVOUT_OV_FAULT_LIMITR/WWor dLINEAR16[V]PAGE41hVOUT_OV_FAULT_RESPONS ER/WByteBytePAGE42hVOUT_OV_WARN_LIMITR/W WordLINEAR16[V]PAGE43hVOUT_UV_WARN_LIMIT R/WWordLINEAR16[V]PAGE44hVOUT_UV_FAULT_L IMITR/WWordLINEAR16[V]PAGE45hVOUT_UV_FAU LT_RESPONSER/WByteBytePAGE46hIOUT_OC_FAU LT_LIMITR/WWordLINEAR11[A]PAGE47hIOUT_OC _FAULT_RESPONSER/WByteBytePAGE48hIOUT_OC _LV_FAULT_LIMITR/WWordLINEAR16[V]PAGE49h IOUT_OC_LV_FAULT_RESPONSER/WByteBytePAGE 4 AhIOUT_OC_WARN_LIMITR/WWordLINEAR11[A]

7 PAGE4 BhIOUT_UC_FAULT_LIMITR/WWordLINEAR11[A]P AGE4 ChIOUT_UC_FAULT_RESPONSER/WByteBytePAGE4 DhReserved4 EhReserved4 FhOT_FAULT_LIMITR/WWordLINEAR11[ C]PAGE50hOT_FAULT_RESPONSER/WByteBytePAG E51hOT_WARN_LIMITR/WWordLINEAR11[ C]PAGE52hUT_WARN_LIMITR/WWordLINEAR11[ C]PAGENOTSUPPORTED53hUT_FAULT_LIMITR/WWo rdLINEAR11[ C]PAGENOTSUPPORTED54hUT_FAULT_RESPONSER/ WByteBytePAGENOTSUPPORTED55hVIN_OV_FAULT _LIMITR/WWordLINEAR11[V]Common6 UCD92xxDigitalPWMS ystemControllerPMBusCommandReferenceSLUU 337 (continued)TransactionDataFormatCodeComm andScopeCommentType[Units]56hVIN_OV_FAUL T_RESPONSER/WByteByteCommon57hVIN_OV_WAR N_LIMITR/WWordLINEAR11[V]Common58hVIN_UV _WARN_LIMITR/WWordLINEAR11[V]Common59hVI N_UV_FAULT_LIMITR/WWordLINEAR11[V]Common 5 AhVIN_UV_FAULT_RESPONSER/WByteByteCommon 5 BhIIN_OC_FAULT_LIMITNOTSUPPORTED5 ChIIN_OC_FAULT_RESPONSENOTSUPPORTED5 DhIIN_OC_WARN_LIMITNOTSUPPORTED5 EhPOWER_GOOD_ONR/WWordLINEAR16[V]PAGE5 FhPOWER_GOOD_OFFR/WWordLINEAR16[V]PAGE60 hTON_DELAYR/WWordLINEAR11[ms]PAGE61hTON_ RISER/WWordLINEAR11[ms]PAGE62hTON_MAX_FA ULT_LIMITR/WWordLINEAR11[ms]PAGE63hTON_M AX_FAULT_RESPONSER/WByteBytePAGE64hTOFF_ DELAYR/WWordLINEAR11[ms]PAGE65hTOFF_FALL R/WWordLINEAR11[ms]

8 PAGE66hTOFF_MAX_WARN_LIMITR/WWordLINEAR1 1[ms]PAGE67hReservedNOTSUPPORTED68hPOUT_ OP_FAULT_LIMITNOTSUPPORTED69hPOUT_OP_FAU LT_RESPONSENOTSUPPORTED6 AhPOUT_OP_WARN_LIMITNOTSUPPORTED6 BhPIN_OP_WARN_LIMITNOTSUPPORTED6Ch-77hRe served78hSTATUS_BYTER/WByteByteCommonREA DONLY79hSTATUS_WORDR/WWordWordCommonREAD ONLY7 AhSTATUS_VOUTR/WByteBytePAGEREADONLY7 BhSTATUS_IOUTR/WByteBytePAGEREADONLY7 ChSTATUS_INPUTR/WByteBytePAGEREADONLY7 DhSTATUS_TEMPERATURER/WByteBytePAGEREADO NLY7 EhSTATUS_CMLR/WByteByteCommonREADONLY7 FhSTATUS_OTHERR/WByteByteCommonREADONLY8 0hSTATUS_MFR_SPECIFICR/WByteBytePAGEREAD ONLY81hSTATUS_FANS_1_2R/WByteByteCommonR EADONLY82hSTATUS_FANS_3_4R/WByteByteComm onREADONLY Alwaysreturns0x0083h-87hReserved88hREAD_ VINR/WWordLINEAR11[V]CommonREADONLY89hRE AD_IINR/WWordLINEAR11[A]CommonREADONLY8 AhREAD_VCAPREADONLY NOTSUPPORTED8 BhREAD_VOUTR/WWordLINEAR16[V]PAGEREADONL YPAGE&8 ChREAD_IOUTR/WWordLINEAR11[A]READONLYPHA SE8 DhREAD_TEMPERATURE_1R/WWordLINEAR11[ C]CommonREADONLYPAGE&8 EhREAD_TEMPERATURE_2R/WWordLINEAR11[ C]READONLYPHASE8 FhREAD_TEMPERATURE_3R/WWordLINEAR11[ C]CommonREADONLY NOTSUPPORTED90hREAD_FAN_SPEED_1R/WWordLI NEAR11[RPM]CommonREADONLY91hREAD_FAN_SPE ED_2 READONLY NOTSUPPORTED92hREAD_FAN_SPEED_3 READONLY NOTSUPPORTED93hREAD_FAN_SPEED_4 READONLY NOTSUPPORTED94hREAD_DUTY_CYCLER/WWordLIN EAR11[0-100%]PAGEREADONLYSLUU337 (continued)

9 TransactionDataFormatCodeCommandScopeCom mentType[Units]95hREAD_FREQUENCYR/WWordL INEAR11[kHz]PAGEREADONLY NOTSUPPORTED96hREAD_POUTR/WWordLINEAR11[ W]PAGEREADONLY97hREAD_PINR/WWordLINEAR11 [W]CommonREADONLY98hPMBUS_REVISIONR/WByt eByteCommonREADONLYR/Wblock99hMFR_IDStri ngCommon18bytesR/Wblock9 AhMFR_MODELS tringCommon12bytesR/Wblock9 BhMFR_REVISIONS tringCommon12bytesR/Wblock9 ChMFR_LOCATIONS tringCommon12bytesR/Wblock9 DhMFR_DATES tringCommon6bytesR/Wblock9 EhMFR_SERIALS tringCommon12bytes9 FhReservedA0hMFR_VIN_MINR/WWordLINEAR11[ V]CommonNOTSUPPORTEDA1hMFR_VIN_MAXR/WWor dLINEAR11[V]CommonNOTSUPPORTEDA2hMFR_IIN _MAXR/WWordLINEAR11[A]CommonNOTSUPPORTED A3hMFR_PIN_MAXR/WWordLINEAR11[W]CommonNO TSUPPORTEDA4hMFR_VOUT_MINR/WWordLINEAR11 [V]CommonNOTSUPPORTEDA5hMFR_VOUT_MAXR/WW ordLINEAR11[V]CommonNOTSUPPORTEDA6hMFR_I OUT_MAXR/WWordLINEAR11[A]PAGENOTSUPPORTE DA7hMFR_POUT_MAXR/WWordLINEAR11[W]Common NOTSUPPORTEDA8hMFR_TAMBIENT_MAXR/WWordLI NEAR11[ C]CommonNOTSUPPORTEDA9hMFR_TAMBIENT_MINR /WWordLINEAR11[ C]CommonNOTSUPPORTEDAAh-AFhReservedB0h-B FhUSER_DATA_00 USER_DATA_15 NOTSUPPORTEDC0h-CFhReservedMustbeconfigu redinconjunctionwithD0hSEQ_TIMEOUT(MFR_S PECIFIC_00)R/WWordLINEAR11[ms]PAGEGPIO_S EQ_CONFIG whichselectstheexternalpintousefortheinp utsourceVOUT_CAL_MONITOR(MFR_SPECIFO ffsetcalibrationvalueforthesensorusedD1h R/WWordLINEAR16[V]PAGEIC_01) (MFR_SPECIFIC_02)

10 (MFR_SPECIR atiothatrepresentstheresistordividerD3hR /WWordLINEAR11[V/V]CommonFIC_03)betweenV inandtheVinsenseinput.<bank>ThiscommandsetsthebanknumberfortheD4hCLA _BANK(MFR_SPECIFIC_04) <gain> (MFR_SPECIFIC_05) :0=outputbridgedtoanothervoltagePAGE_ISO LATED source,D6hR/WByteBytePAGE(MFR_SPECIFIC_0 6)1= [ns]PAGE(MFR_SPECIFIC_07) (continued)TransactionDataFormatCodeComm andScopeCommentType[Units]<bank>Thiscommandactivates(loadsfromRAMtotheap propriateCLAregisters) (MFR_SPECIFIC_08)setto0xFF, (MFR_SPECIFIC_09) (MFR_SPECIFIC_10)R/WByteByteCommonvariab leandthenmonitoringitsvalue, (MFR_SPECIFIC_11) [V/A]CommonScalinggainforinputcurrentsen secircuit.(MFR_SPECIFIC_12)THERMAL_COEFT hermalcoefficientofthecurrentsenseDDhR/W WordLINEAR11[%/ C]PAGE(MFR_SPECIFIC_13) (MFR_SPECIFIC_14) [ns]PAGEM inimumpulsewidthfordriveroutput[ns].