Cmu_Lock - Configuration Lock Register - Silicon Laboratories EFR32xG14 Wireless Gecko Reference Manual

11.5.48 CMU_LOCK - Configuration Lock Register

Offset
0x180
Reset
Access
Name
Bit Name
31:16 Reserved
15:0 LOCKKEY
Write any other value than the unlock code to lock CMU_CTRL, CMU_ROUTEPEN, CMU_ROUTELOC0, CMU_ROUTE-
LOC1, CMU_HFRCOCTRL, CMU_AUXHFRCOCTRL, CMU_LFRCOCTRL, CMU_ULFRCOCTRL, CMU_HFXOCTRL,
CMU_HFXOCTRL1,
CMU_LFXOCTRL,
CMU_LFBCLKSEL,
CMU_HFPERCLKEN0, CMU_HFRADIOCLKEN0, CMU_HFRADIOALTCLKEN0, CMU_HFPRESC, CMU_HFCORE-
PRESC, CMU_HFPERPRESC,
CMU_LFACLKEN0, CMU_LFBCLKEN0, CMU_LFECLKEN0, CMU_LFRCLKEN0, CMU_LFAPRESC0, CMU_LFBPRESC0,
CMU_LFEPRESC0, CMU_LFRPRESC0, CMU_ADCCTRL CMU_LVDSCTRL, and CMU_PCNTCTRL from editing. Write
the unlock code to unlock. When reading the register, bit 0 is set when the lock is enabled.
Mode
Read Operation
UNLOCKED
LOCKED
Write Operation
LOCK
UNLOCK
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Reset Access Description
To ensure compatibility with future devices, always write bits to 0. More information in
tions
0x0000 RWH Configuration Lock Key
CMU_HFXOSTARTUPCTRL,
CMU_OSCENCMD, CMU_CMD,
CMU_LFECLKSEL, CMU_LFRCLKSEL,
CMU_HFRADIOPRESC,
Value Description
0 CMU registers are unlocked
1 CMU registers are locked
0 Lock CMU registers
0x580E Unlock CMU registers
Bit Position
CMU_HFXOSTEADYSTATECTRL,
CMU_DBGCLKSEL, CMU_HFCLKSEL,
CMU_HFBUSCLKEN0,
CMU_HFRADIOALTPRESC,
Reference Manual
CMU - Clock Management Unit
1.2 Conven-
CMU_HFXOTIMEOUTCTRL,
CMU_LFACLKSEL,
CMU_HFUNDIVCLKEN0,
CMU_HFEXPPRESC,
Rev. 1.1 | 363