SPMU387 December   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 LMK3H2108A18 Configuration Information
  4. 2Device Register Map
  5. 3Device Registers
  6. 4Revision History

1.1 LMK3H2108A18 Configuration Information

Table 1-1 LMK3H2108A18 Frequency Configuration
OTP PageOUT0 (MHz)OUT1 (MHz)OUT2 (MHz)OUT3 (MHz)OUT4 (MHz)OUT5 (MHz)OUT6 (MHz)OUT7 (MHz)
OTP Page 0100100100100100100100100
OTP Page 1100100100100100100100100
OTP Page 2100100100100100100100100
OTP Page 3100100100100100100100100
Table 1-2 LMK3H2108A18 I2C Configuration
OTP PageI2C Configuration
OTP Page 0

I2C Address: 0x68

1 Byte Register Addressing

OTP Page 1

I2C Address: 0x68

1 Byte Register Addressing

OTP Page 2

I2C Address: 0x68

1 Byte Register Addressing

OTP Page 3

I2C Address: 0x68

1 Byte Register Addressing

OTP Page 0

Table 1-3 LMK3H2108A18 GPI Settings, OTP Page 0
GPI PinPin BehaviorPolarityInternal Pull-DownInternal Pull-Up
GPI0GPINormalEnabledDisabled
GPI1GPINormalEnabledDisabled
GPI2GPINormalEnabledDisabled
GPI3GPINormalEnabledDisabled
GPI4GPINormalEnabledDisabled
GPI5GPINormalEnabledDisabled
Table 1-4 LMK3H2108A18 GPIO Settings, OTP Page 0
GPIO PinPin BehaviorPolarityInternal Pull-DownInternal Pull-Up
GPIO0Dynamic OTPNormalEnabledDisabled
GPIO1Dynamic OTPNormalEnabledDisabled
GPIO2GPINormalEnabledDisabled
GPIO3Status Output, CLK_READYNormalEnabledDisabled
GPIO4Global OEInvertedEnabledDisabled
Table 1-5 LMK3H2108A18 Input Settings, OTP Page 0
InputPowered Up/DownInput FormatInput Termination
IN_0Powered DownN/A (IN0 Unused)None, DC
IN_1Powered DownN/A (IN1 Unused)None, DC
IN_2Powered DownN/A (IN2 Unused)None, DC
Table 1-6 LMK3H2108A18 Output Settings, OTP Page 0
OutputFrequency (MHz)FormatClock SourceOutput StateOE GroupSSC Behavior
OUT010085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyDisabled
OUT110085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyDisabled
OUT210085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyDisabled
OUT310085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyDisabled
OUT410085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyDisabled
OUT510085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyDisabled
OUT610085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyDisabled
OUT710085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyDisabled

OTP Page 1

Table 1-7 LMK3H2108A18 GPI Settings, OTP Page 1
GPI PinPin BehaviorPolarityInternal Pull-DownInternal Pull-Up
GPI0GPINormalEnabledDisabled
GPI1GPINormalEnabledDisabled
GPI2GPINormalEnabledDisabled
GPI3GPINormalEnabledDisabled
GPI4GPINormalEnabledDisabled
GPI5GPINormalEnabledDisabled
Table 1-8 LMK3H2108A18 GPIO Settings, OTP Page 1
GPIO PinPin BehaviorPolarityInternal Pull-DownInternal Pull-Up
GPIO0Dynamic OTPNormalEnabledDisabled
GPIO1Dynamic OTPNormalEnabledDisabled
GPIO2GPINormalEnabledDisabled
GPIO3Status Output, CLK_READYNormalEnabledDisabled
GPIO4Global OEInvertedEnabledDisabled
Table 1-9 LMK3H2108A18 Input Settings, OTP Page 1
InputPowered Up/DownInput FormatInput Termination
IN_0Powered DownN/A (IN0 Unused)None, DC
IN_1Powered DownN/A (IN1 Unused)None, DC
IN_2Powered DownN/A (IN2 Unused)None, DC
Table 1-10 LMK3H2108A18 Output Settings, OTP Page 1
OutputFrequency (MHz)FormatClock SourceOutput StateOE GroupSSC Behavior
OUT010085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyEnabled, -0.25% Down-spread
OUT110085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyEnabled, -0.25% Down-spread
OUT210085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyEnabled, -0.25% Down-spread
OUT310085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyEnabled, -0.25% Down-spread
OUT410085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyEnabled, -0.25% Down-spread
OUT510085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyEnabled, -0.25% Down-spread
OUT610085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyEnabled, -0.25% Down-spread
OUT710085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyEnabled, -0.25% Down-spread

OTP Page 2

Table 1-11 LMK3H2108A18 GPI Settings, OTP Page 2
GPI PinPin BehaviorPolarityInternal Pull-DownInternal Pull-Up
GPI0GPINormalEnabledDisabled
GPI1GPINormalEnabledDisabled
GPI2GPINormalEnabledDisabled
GPI3GPINormalEnabledDisabled
GPI4GPINormalEnabledDisabled
GPI5GPINormalEnabledDisabled
Table 1-12 LMK3H2108A18 GPIO Settings, OTP Page 2
GPIO PinPin BehaviorPolarityInternal Pull-DownInternal Pull-Up
GPIO0Dynamic OTPNormalEnabledDisabled
GPIO1Dynamic OTPNormalEnabledDisabled
GPIO2GPINormalEnabledDisabled
GPIO3Status Output, CLK_READYNormalEnabledDisabled
GPIO4Global OEInvertedEnabledDisabled
Table 1-13 LMK3H2108A18 Input Settings, OTP Page 2
InputPowered Up/DownInput FormatInput Termination
IN_0Powered DownN/A (IN0 Unused)None, DC
IN_1Powered DownN/A (IN1 Unused)None, DC
IN_2Powered DownN/A (IN2 Unused)None, DC
Table 1-14 LMK3H2108A18 Output Settings, OTP Page 2
OutputFrequency (MHz)FormatClock SourceOutput StateOE GroupSSC Behavior
OUT010085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyEnabled, -0.3% Down-spread
OUT110085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyEnabled, -0.3% Down-spread
OUT210085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyEnabled, -0.3% Down-spread
OUT310085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyEnabled, -0.3% Down-spread
OUT410085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyEnabled, -0.3% Down-spread
OUT510085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyEnabled, -0.3% Down-spread
OUT610085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyEnabled, -0.3% Down-spread
OUT710085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyEnabled, -0.3% Down-spread

OTP Page 3

Table 1-15 LMK3H2108A18 GPI Settings, OTP Page 3
GPI PinPin BehaviorPolarityInternal Pull-DownInternal Pull-Up
GPI0GPINormalEnabledDisabled
GPI1GPINormalEnabledDisabled
GPI2GPINormalEnabledDisabled
GPI3GPINormalEnabledDisabled
GPI4GPINormalEnabledDisabled
GPI5GPINormalEnabledDisabled
Table 1-16 LMK3H2108A18 GPIO Settings, OTP Page 3
GPIO PinPin BehaviorPolarityInternal Pull-DownInternal Pull-Up
GPIO0Dynamic OTPNormalEnabledDisabled
GPIO1Dynamic OTPNormalEnabledDisabled
GPIO2GPINormalEnabledDisabled
GPIO3Status Output, CLK_READYNormalEnabledDisabled
GPIO4Global OEInvertedEnabledDisabled
Table 1-17 LMK3H2108A18 Input Settings, OTP Page 3
InputPowered Up/DownInput FormatInput Termination
IN_0Powered DownN/A (IN0 Unused)None, DC
IN_1Powered DownN/A (IN1 Unused)None, DC
IN_2Powered DownN/A (IN2 Unused)None, DC
Table 1-18 LMK3H2108A18 Output Settings, OTP Page 3
OutputFrequency (MHz)FormatClock SourceOutput StateOE GroupSSC Behavior
OUT010085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyEnabled, -0.5% Down-spread
OUT110085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyEnabled, -0.5% Down-spread
OUT210085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyEnabled, -0.5% Down-spread
OUT310085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyEnabled, -0.5% Down-spread
OUT410085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyEnabled, -0.5% Down-spread
OUT510085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyEnabled, -0.5% Down-spread
OUT610085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyEnabled, -0.5% Down-spread
OUT710085 Ω LP-HCSLPATH1EnabledGlobal OE OnlyEnabled, -0.5% Down-spread