NXP Semiconductors freescale K51 Series Reference Manual

14.4.3 Regulator Status and Control Register (PMC_REGSC)The power management controller contains an internal voltage regulator. The voltageregulator design uses a bandgap reference, that is also available through a buffer as inputto certain internal peripherals. The internal regulator provides a status bit (REGONS)indicating the regulator is in run regulation. This bit is used when the application movesfrom a low power or very low power mode where the frequency is limited to normal runmode. The frequency of the application can not be increased until the regulator is back inrun regulation (REGONS=1).Address: PMC_REGSC is 4007_D000h base + 2h offset = 4007_D002hBit 7 6 5 4 3 2 1 0Read 0 TRAMPO VLPRS REGONS BGBEWrite 0Reset 0 0 0 0 0 1 0 0PMC_REGSC field descriptionsField Description7–5ReservedThis read-only field is reserved and always has the value zero.4TRAMPOFor devices with FlexNVM: Traditional RAM Power OptionFor devices with program flash only: ReservedFor devices with FlexNVM: When the FlexRAM on the device is configured for traditional RAM, this bitenables powering of this RAM in VLLS2 mode.0 For devices with FlexNVM: Traditional RAM not powered in VLLS2For devices with program flash only: No effect1 For devices with FlexNVM: Traditional RAM powered in VLLS2For devices with program flash only: No effect3VLPRSVery Low Power Run StatusThis read only bit indicates the current run mode is VLPR.0 MCU is not in VLPR mode1 MCU is in VLPR mode2REGONSRegulator in Run Regulation StatusThis read-only bit provides the current status of the internal voltage regulator.0 Regulator is in stop regulation or in transition to/from it1 Regulator is in run regulation1ReservedThis field is reserved.Table continues on the next page...PMC Memory Map/Register DefinitionK51 Sub-Family Reference Manual, Rev. 6, Nov 2011318 Freescale Semiconductor, Inc.