SPMU407 November   2025 LMK3H2108

 

  1.   1
  2.   Read This First
    1.     About This Manual
    2.     Notational Conventions
    3.     Glossary
    4.     Related Documentation
    5.     Support Resources
    6.     Trademarks
  3. 1Configuration Overview
    1. 1.1 LMK3H2108A03 Configuration Information
  4. 2Device Register Map
  5. 3Device Registers
  6. 4Revision History

2 Device Register Map

Table 2-1 lists the memory-mapped registers for the Device registers. All register offset addresses not listed in Table 2-1 should be considered as reserved locations and the register contents should not be modified.

Table 2-1 Register Map
Offset
(Hex)		Register
Acronym		Bit
76543210
0x0R0VENDOR_ID[7:0]
0x1R1VENDOR_ID[15:8]
0x2R2FLOAT_VDDO_6FLOAT_VDDO_5FLOAT_VDDO_3_4FLOAT_VDDO_1_2FLOAT_VDDO_0FLOAT_VDDRFLOAT_VDDXOTP_BURNT
0x3R3RESGPIO1_PU_RBGPIO0_PU_RBRESFLOAT_VDDO_7
0x4R4RESGPIO2_PU_RB
0x5R5RESOTP_PAGE_SEL_DYN_DEBOUNCERES
0x6R6I2C_REG_ADDR_FMTI2C_TRGT_ADDR
0x8R8PWRGD_SAMPLE_TMR
0x9R9RESSUP_LVL_RAMP_TMRPWRGD_SAMPLE_TMR_EN
0xAR10GLOBAL_SUP_DET_TMR
0xBR11FOD0_PDBAW_PDAUTO_FOD_PD_ENCRC_IGNOREPIN_RESAMPLE_DISOTP_AUTOLOAD_DISPDNGLOBAL_SUP_DET_TMR_EN
0xCR12RESIN2_PDIN1_PDIN0_PDFOD1_PD
0xDR13PWRGD_PWRDN_PIN_SELRES
0xER14RESGPI0_FUNC
0xFR15RESGPI1_FUNC
0x10R16RESGPI2_FUNC
0x11R17RESOE_GLOBALRES
0x12R18RESGPI3_FUNC
0x13R19RESGPI4_FUNC
0x14R20RESGPI5_FUNC
0x15R21RESGPIO0_FUNC
0x16R22RESGPIO1_FUNC
0x17R23RESGPIO2_FUNC
0x18R24RESGPIO3_FUNC
0x19R25RESGPIO4_FUNC
0x1AR26GPIO1_OUT_SRC_SELGPIO0_OUT_SRC_SEL
0x1BR27GPIO3_OUT_SRC_SELGPIO2_OUT_SRC_SEL
0x1CR28GPI3_POLARITYGPI2_POLARITYGPI1_POLARITYGPI0_POLARITYGPIO4_OUT_SRC_SEL
0x1DR29GPI0_PULL_DN_ENGPIO4_POLARITYGPIO3_POLARITYGPIO2_POLARITYGPIO1_POLARITYGPIO0_POLARITYGPI5_POLARITYGPI4_POLARITY
0x1ER30GPI3_PULL_DN_ENRESGPI2_PULL_UP_ENGPI2_PULL_DN_ENGPI1_PULL_UP_ENGPI1_PULL_DN_ENGPI0_PULL_UP_EN
0x1FR31GPIO1_PULL_DN_ENGPIO0_PULL_UP_ENGPIO0_PULL_DN_ENGPI5_PULL_UP_ENGPI5_PULL_DN_ENGPI4_PULL_UP_ENGPI4_PULL_DN_ENGPI3_PULL_UP_EN
0x20R32GPIO0_NUM_IN_LVLGPIO4_PULL_UP_ENGPIO4_PULL_DN_ENGPIO3_PULL_UP_ENGPIO3_PULL_DN_ENGPIO2_PULL_UP_ENGPIO2_PULL_DN_ENGPIO1_PULL_UP_EN
0x21R33GPI3_LIVE_RBGPI2_LIVE_RBGPI1_LIVE_RBGPI0_LIVE_RBRESGPIO2_NUM_IN_LVLGPIO1_NUM_IN_LVL
0x22R34GPIO2_LIVE_RBGPIO1_LIVE_RBGPIO0_LIVE_RBGPI5_LIVE_RBGPI4_LIVE_RB
0x23R35RESGPIO4_GPO_VALGPIO3_GPO_VALGPIO2_GPO_VALGPIO1_GPO_VALGPIO0_GPO_VALGPIO4_LIVE_RBGPIO3_LIVE_RB
0x24R36RESGPI1_OE_GRP_SELGPI0_OE_GRP_SEL
0x25R37RESGPI3_OE_GRP_SELGPI2_OE_GRP_SEL
0x26R38RESGPI5_OE_GRP_SELGPI4_OE_GRP_SEL
0x27R39RESGPIO1_OE_GRP_SELGPIO0_OE_GRP_SEL
0x28R40RESGPIO3_OE_GRP_SELGPIO2_OE_GRP_SEL
0x29R41GPIO4_OUT_SIG_TYPEGPIO3_OUT_SIG_TYPEGPIO2_OUT_SIG_TYPEGPIO1_OUT_SIG_TYPEGPIO0_OUT_SIG_TYPEGPIO4_OE_GRP_SEL
0x2AR42RESIN2_RCVR_FMTIN1_RCVR_FMTIN0_RCVR_FMT
0x2BR43RESIN1_TERMINATION_SELIN0_TERMINATION_SEL
0x2CR44IN1_LOS_THRESHIN0_LOS_THRESHIN2_LOS_ENIN1_LOS_ENIN0_LOS_ENIN2_TERMINATION_SEL
0x2DR45PERST_BUF_IN0_STSPERST_BUF_IN2PERST_BUF_IN1PERST_BUF_IN0IN2_LOS_THRESH
0x2ER46RESPERST_BUF_IN2_LOS_ENPERST_BUF_IN1_LOS_ENPERST_BUF_IN0_LOS_ENPERST_BUF_IN2_STSPERST_BUF_IN1_STS
0x2FR47RESFOD0_N_DIV
0x30R48RESFOD1_N_DIV
0x31R49FOD0_NUM[7:0]
0x32R50FOD0_NUM[15:8]
0x33R51FOD0_NUM[23:16]
0x34R52FOD1_NUM[7:0]
0x35R53FOD1_NUM[15:8]
0x36R54FOD1_NUM[23:16]
0x37R55FOD1_CFG_UPDATEFOD0_CFG_UPDATEPATH1_DIVPATH0_DIV
0x39R57RESFOD_PH_OFFSET_N_DIV
0x3AR58FOD_PH_OFFSET_NUM[7:0]
0x3BR59FOD_PH_OFFSET_NUM[15:8]
0x3CR60RESFOD0_SSC_CONFIG_SELFOD0_SSC_MOD_TYPEFOD0_SSC_ENFOD_PH_OFFSET_FOD_SELFOD_PH_OFFSET_SHIFT_NOW
0x3DR61FOD0_SSC_STEPS[7:0]
0x3ER62RESFOD0_SSC_STEPS[12:8]
0x3FR63FOD0_DCO_STEP_SIZE[7:0]
0x40R64FOD0_DCO_STEP_SIZE[15:8]
0x41R65RESFOD1_SSC_CONFIG_SELFOD1_SSC_MOD_TYPEFOD1_SSC_EN
0x42R66FOD1_SSC_STEPS[7:0]
0x43R67RESFOD1_SSC_STEPS[12:8]
0x44R68FOD1_DCO_STEP_SIZE[7:0]
0x45R69FOD1_DCO_STEP_SIZE[15:8]
0x46R70RESFOD1_DCO_DECFOD1_DCO_INCFOD1_DCO_ENFOD0_DCO_DECFOD0_DCO_INCFOD0_DCO_EN
0x47R71FOD0_DCO_STEPS_STAT[7:0]
0x48R72FOD0_DCO_STEPS_STAT[15:8]
0x49R73FOD1_DCO_STEPS_STAT[7:0]
0x4AR74FOD1_DCO_STEPS_STAT[15:8]
0x4BR75RESFOD0_DCO_N_DIV_STAT
0x4CR76FOD0_DCO_NUM_STAT[7:0]
0x4DR77FOD0_DCO_NUM_STAT[15:8]
0x4ER78FOD0_DCO_NUM_STAT[23:16]
0x4FR79RESFOD1_DCO_N_DIV_STAT
0x50R80FOD1_DCO_NUM_STAT[7:0]
0x51R81FOD1_DCO_NUM_STAT[15:8]
0x52R82FOD1_DCO_NUM_STAT[23:16]
0x53R83BANK1_CLK_SELBANK0_CLK_SELPATH1_EDGE_COMB_ENPATH0_EDGE_COMB_EN
0x54R84RESBANK3_CLK_SELBANK2_CLK_SEL
0x55R85RESBANK5_CLK_SELBANK4_CLK_SEL
0x56R86BANK0_CH_DIV[7:0]
0x57R87BANK0_CH_DIV[15:8]
0x58R88BANK2_CH_DIVBANK1_CH_DIV
0x59R89RESIN0_LOS
0x5AR90BANK4_CH_DIVBANK3_CH_DIV
0x5BR91PERST_BUF_BANK1PERST_BUF_BANK0BANK5_CH_DIV
0x5CR92PERST_BUF_BANK5PERST_BUF_BANK4PERST_BUF_BANK3PERST_BUF_BANK2
0x5DR93BANK1_AUTO_CLK_SWITCHBACK_ENBANK0_AUTO_CLK_SWITCHBACK_ENBANK5_AUTO_CLK_SWITCHOVER_ENBANK4_AUTO_CLK_SWITCHOVER_ENBANK3_AUTO_CLK_SWITCHOVER_ENBANK2_AUTO_CLK_SWITCHOVER_ENBANK1_AUTO_CLK_SWITCHOVER_ENBANK0_AUTO_CLK_SWITCHOVER_EN
0x5ER94BANK3_AUTO_CLK_SWITCHOVER_CLK_SELBANK2_AUTO_CLK_SWITCHOVER_CLK_SELBANK1_AUTO_CLK_SWITCHOVER_CLK_SELBANK0_AUTO_CLK_SWITCHOVER_CLK_SELBANK5_AUTO_CLK_SWITCHBACK_ENBANK4_AUTO_CLK_SWITCHBACK_ENBANK3_AUTO_CLK_SWITCHBACK_ENBANK2_AUTO_CLK_SWITCHBACK_EN
0x5FR95BANK5_CLK_SWITCHOVER_TYPEBANK4_CLK_SWITCHOVER_TYPEBANK3_CLK_SWITCHOVER_TYPEBANK2_CLK_SWITCHOVER_TYPEBANK1_CLK_SWITCHOVER_TYPEBANK0_CLK_SWITCHOVER_TYPEBANK5_AUTO_CLK_SWITCHOVER_CLK_SELBANK4_AUTO_CLK_SWITCHOVER_CLK_SEL
0x60R96BANK1_SWITCHOVER_FRC_CLK_ENBANK0_SWITCHOVER_FRC_CLK_ENBANK5_CLK_DIS_ON_LOSBANK4_CLK_DIS_ON_LOSBANK3_CLK_DIS_ON_LOSBANK2_CLK_DIS_ON_LOSBANK1_CLK_DIS_ON_LOSBANK0_CLK_DIS_ON_LOS
0x61R97OUT1_SLEW_RATEOUT0_SLEW_RATEBANK5_SWITCHOVER_FRC_CLK_ENBANK4_SWITCHOVER_FRC_CLK_ENBANK3_SWITCHOVER_FRC_CLK_ENBANK2_SWITCHOVER_FRC_CLK_EN
0x62R98OUT5_SLEW_RATEOUT4_SLEW_RATEOUT3_SLEW_RATEOUT2_SLEW_RATE
0x63R99OUT1_CMOS_SLEW_RATEOUT0_CMOS_SLEW_RATEOUT7_SLEW_RATEOUT6_SLEW_RATE
0x64R100OUT5_CMOS_SLEW_RATEOUT4_CMOS_SLEW_RATEOUT3_CMOS_SLEW_RATEOUT2_CMOS_SLEW_RATE
0x65R101OUT1_DIS_STATEOUT0_DIS_STATEOUT7_CMOS_SLEW_RATEOUT6_CMOS_SLEW_RATE
0x66R102OUT5_DIS_STATEOUT4_DIS_STATEOUT3_DIS_STATEOUT2_DIS_STATE
0x67R103OUT0_FMTRESOUT7_DIS_STATEOUT6_DIS_STATE
0x68R104OUT4_FMTOUT3_FMTOUT2_FMTOUT1_FMT
0x69R105RESIN1_LOS
0x6AR106OUT1_CMOS_1P2V_ENOUT0_CMOS_1P2V_ENOUT7_FMTOUT6_FMTOUT5_FMT
0x6BR107RESOUT7_CMOS_1P2V_ENOUT6_CMOS_1P2V_ENOUT5_CMOS_1P2V_ENOUT4_CMOS_1P2V_ENOUT3_CMOS_1P2V_ENOUT2_CMOS_1P2V_EN
0x6CR108OUT1_OE_GRPOUT0_OE_GRP
0x6DR109OUT3_OE_GRPOUT2_OE_GRP
0x6ER110OUT5_OE_GRPOUT4_OE_GRP
0x6FR111OUT7_OE_GRPOUT6_OE_GRP
0x70R112OUT1_LPHCSL_VOD_SELOUT0_LPHCSL_VOD_SEL
0x71R113OUT3_LPHCSL_VOD_SELOUT2_LPHCSL_VOD_SEL
0x72R114OUT5_LPHCSL_VOD_SELOUT4_LPHCSL_VOD_SEL
0x73R115OUT7_LPHCSL_VOD_SELOUT6_LPHCSL_VOD_SEL
0x74R116OUT3_SYNC_MODEOUT2_SYNC_MODEOUT1_SYNC_MODEOUT0_SYNC_MODE
0x75R117OUT7_SYNC_MODEOUT6_SYNC_MODEOUT5_SYNC_MODEOUT4_SYNC_MODE
0x76R118OUT3P_OE_CMOSOUT2N_OE_CMOSOUT2P_OE_CMOSOUT1N_OE_CMOSOUT1P_OE_CMOSOUT0N_OE_CMOSOUT0P_OE_CMOSSINGLE_CMOS_EN_SYNC
0x77R119OUT7P_OE_CMOSOUT6N_OE_CMOSOUT6P_OE_CMOSOUT5N_OE_CMOSOUT5P_OE_CMOSOUT4N_OE_CMOSOUT4P_OE_CMOSOUT3N_OE_CMOS
0x78R120OUT6_FREQ_DET_ENOUT5_FREQ_DET_ENOUT4_FREQ_DET_ENOUT3_FREQ_DET_ENOUT2_FREQ_DET_ENOUT1_FREQ_DET_ENOUT0_FREQ_DET_ENOUT7N_OE_CMOS
0x79R121RESIN2_LOS
0x7AR122OUT4_FREQ_DET_THRESHOUT3_FREQ_DET_THRESHOUT2_FREQ_DET_THRESHOUT1_FREQ_DET_THRESHOUT0_FREQ_DET_THRESHRESOUT7_FREQ_DET_EN
0x7BR123OUT2_AMP_DET_ENOUT1_AMP_DET_ENOUT0_AMP_DET_ENRESOUT7_FREQ_DET_THRESHOUT6_FREQ_DET_THRESHOUT5_FREQ_DET_THRESH
0x7CR124OUT_AMP_DET_THRESHRESOUT7_AMP_DET_ENOUT6_AMP_DET_ENOUT5_AMP_DET_ENOUT4_AMP_DET_ENOUT3_AMP_DET_EN
0x7DR125CRC_ERROR_EVT_INTR_ENIN2_LOS_LMT_EVT_INTR_ENIN1_LOS_LMT_EVT_INTR_ENIN0_LOS_LMT_EVT_INTR_ENIN2_LOS_EVT_INTR_ENIN1_LOS_EVT_INTR_ENIN0_LOS_EVT_INTR_ENDEV_INTR
0x7ER126OUT3N_FREQ_ERR_EVT_INTR_ENOUT3P_FREQ_ERR_EVT_INTR_ENOUT2N_FREQ_ERR_EVT_INTR_ENOUT2P_FREQ_ERR_EVT_INTR_ENOUT1N_FREQ_ERR_EVT_INTR_ENOUT1P_FREQ_ERR_EVT_INTR_ENOUT0N_FREQ_ERR_EVT_INTR_ENOUT0P_FREQ_ERR_EVT_INTR_EN
0x7FR127OUT7N_FREQ_ERR_EVT_INTR_ENOUT7P_FREQ_ERR_EVT_INTR_ENOUT6N_FREQ_ERR_EVT_INTR_ENOUT6P_FREQ_ERR_EVT_INTR_ENOUT5N_FREQ_ERR_EVT_INTR_ENOUT5P_FREQ_ERR_EVT_INTR_ENOUT4N_FREQ_ERR_EVT_INTR_ENOUT4P_FREQ_ERR_EVT_INTR_EN
0x80R128OUT2N_AMP_ERR_EVT_INTR_ENOUT2P_AMP_ERR_EVT_INTR_ENOUT1N_AMP_ERR_EVT_INTR_ENOUT1P_AMP_ERR_EVT_INTR_ENOUT0N_AMP_ERR_EVT_INTR_ENOUT0P_AMP_ERR_EVT_INTR_ENRES
0x81R129OUT6N_AMP_ERR_EVT_INTR_ENOUT6P_AMP_ERR_EVT_INTR_ENOUT5N_AMP_ERR_EVT_INTR_ENOUT5P_AMP_ERR_EVT_INTR_ENOUT4N_AMP_ERR_EVT_INTR_ENOUT4P_AMP_ERR_EVT_INTR_ENOUT3N_AMP_ERR_EVT_INTR_ENOUT3P_AMP_ERR_EVT_INTR_EN
0x82R130RESIN2_LOS_EVTIN1_LOS_EVTIN0_LOS_EVTRESOUT7N_AMP_ERR_EVT_INTR_ENOUT7P_AMP_ERR_EVT_INTR_EN
0x83R131IN1_LOS_CNTRIN0_LOS_CNTR
0x84R132LOS_LMTIN2_LOS_CNTR
0x85R133OUT0N_FREQ_GOODOUT0P_FREQ_GOODCRC_ERROR_EVTCRC_ERRORCRC_DONEIN2_LOS_LMT_EVTIN1_LOS_LMT_EVTIN0_LOS_LMT_EVT
0x86R134OUT4N_FREQ_GOODOUT4P_FREQ_GOODOUT3N_FREQ_GOODOUT3P_FREQ_GOODOUT2N_FREQ_GOODOUT2P_FREQ_GOODOUT1N_FREQ_GOODOUT1P_FREQ_GOOD
0x87R135RESOUT7N_FREQ_GOODOUT7P_FREQ_GOODOUT6N_FREQ_GOODOUT6P_FREQ_GOODOUT5N_FREQ_GOODOUT5P_FREQ_GOOD
0x88R136OUT3N_FREQ_ERR_EVTOUT3P_FREQ_ERR_EVTOUT2N_FREQ_ERR_EVTOUT2P_FREQ_ERR_EVTOUT1N_FREQ_ERR_EVTOUT1P_FREQ_ERR_EVTOUT0N_FREQ_ERR_EVTOUT0P_FREQ_ERR_EVT
0x89R137OUT7N_FREQ_ERR_EVTOUT7P_FREQ_ERR_EVTOUT6N_FREQ_ERR_EVTOUT6P_FREQ_ERR_EVTOUT5N_FREQ_ERR_EVTOUT5P_FREQ_ERR_EVTOUT4N_FREQ_ERR_EVTOUT4P_FREQ_ERR_EVT
0x8AR138OUT2N_AMP_GOODOUT2P_AMP_GOODOUT1N_AMP_GOODOUT1P_AMP_GOODOUT0N_AMP_GOODOUT0P_AMP_GOODRES
0x8BR139OUT6N_AMP_GOODOUT6P_AMP_GOODOUT5N_AMP_GOODOUT5P_AMP_GOODOUT4N_AMP_GOODOUT4P_AMP_GOODOUT3N_AMP_GOODOUT3P_AMP_GOOD
0x8CR140OUT1N_AMP_ERR_EVTOUT1P_AMP_ERR_EVTOUT0N_AMP_ERR_EVTOUT0P_AMP_ERR_EVTRESOUT7N_AMP_GOODOUT7P_AMP_GOOD
0x8DR141OUT5N_AMP_ERR_EVTOUT5P_AMP_ERR_EVTOUT4N_AMP_ERR_EVTOUT4P_AMP_ERR_EVTOUT3N_AMP_ERR_EVTOUT3P_AMP_ERR_EVTOUT2N_AMP_ERR_EVTOUT2P_AMP_ERR_EVT
0x8ER142RESOUT7N_AMP_ERR_EVTOUT7P_AMP_ERR_EVTOUT6N_AMP_ERR_EVTOUT6P_AMP_ERR_EVT
0x8FR143RESPROD_REV_ID
0x90R144OTP_ID
0x93R147UNLOCK_PROTECTED_REG
0x94R148VDDR_SUP_LVL_DET_RBVDDX_SUP_LVL_DET_RBVDDD_SUP_LVL_DET_RBVDDA_SUP_LVL_DET_RB
0x95R149VDDO_5_SUP_LVL_DET_RBVDDO_3_4_SUP_LVL_DET_RBVDDO_1_2_SUP_LVL_DET_RBVDDO_0_SUP_LVL_DET_RB
0x96R150RESVDDO_7_SUP_LVL_DET_RBVDDO_6_SUP_LVL_DET_RB
0x99R153RESOTP_PAGE0_SEL_CODE
0x9AR154RESOTP_PAGE1_SEL_CODE
0x9BR155RESOTP_PAGE2_SEL_CODE
0x9CR156RESOTP_PAGE3_SEL_CODE
0x9DR157OTP_PAGE_RBOTP_PAGE_SEL_CODE_RB
0xBBR187CRC_COMPUTED
0xBCR188RESBOOTOSC_CLK_DISRES
0xFDR253RESPAGE_SEL_0
0x13FR319RESCLK_READY
0x240R576RESOUT0_DIS
0x244R580RESOUT1_DIS
0x248R584RESOUT2_DIS
0x24CR588RESOUT3_DIS
0x250R592RESOUT4_DIS
0x254R596RESOUT5_DIS
0x258R600RESOUT6_DIS
0x25CR604RESOUT7_DIS
0x270R624RESPATH1_FOD_SELRES
0x2E9R745OUT2P_INV_POLOUT1P_INV_POLOUT0P_INV_POLRES
0x2EAR746OUT2N_INV_POLOUT1N_INV_POLOUT0N_INV_POLOUT7P_INV_POLOUT6P_INV_POLOUT5P_INV_POLOUT4P_INV_POLOUT3P_INV_POL
0x2EBR747RESOUT7N_INV_POLOUT6N_INV_POLOUT5N_INV_POLOUT4N_INV_POLOUT3N_INV_POL
0x2FAR762DIE_ID_1[7:0]
0x2FBR763RESDIE_ID_1[14:8]
0x2FCR764DIE_ID_2[7:0]
0x2FER766DIE_ID_2[15:8]
0x2FFR767DIE_ID_3[7:0]
0x300R768DIE_ID_3[15:8]
0x302R770STORED_CRC