Address: 4007_D000h base + 2h offset = 4007_D002hBit 7 6 5 4 3 2 1 0Read 0 0 Reserved BGEN ACKISO REGONS Reserved BGBEWrite w1cReset 0 0 0 0 0 1 0 0PMC_REGSC field descriptionsField Description7ReservedThis field is reserved.This read-only field is reserved and always has the value 0.6ReservedThis field is reserved.This read-only field is reserved and always has the value 0.5ReservedThis field is reserved.4BGENBandgap Enable In VLPx OperationBGEN controls whether the bandgap is enabled in lower power modes of operation (VLPx, LLS, andVLLSx). When on-chip peripherals require the bandgap voltage reference in low power modes ofoperation, set BGEN to continue to enable the bandgap operation.NOTE: When the bandgap voltage reference is not needed in low power modes, clear BGEN to avoidexcess power consumption.0 Bandgap voltage reference is disabled in VLPx , LLS , and VLLSx modes.1 Bandgap voltage reference is enabled in VLPx , LLS , and VLLSx modes.3ACKISOAcknowledge IsolationReading this field indicates whether certain peripherals and the I/O pads are in a latched state as a resultof having been in a VLLS mode. Writing 1 to this field when it is set releases the I/O pads and certainperipherals to their normal run mode state.NOTE: After recovering from a VLLS mode, user should restore chip configuration before clearingACKISO. In particular, pin configuration for enabled LLWU wakeup pins should be restored toavoid any LLWU flag from being falsely set when ACKISO is cleared.0 Peripherals and I/O pads are in normal run state.1 Certain peripherals and I/O pads are in an isolated and latched state.2REGONSRegulator In Run Regulation StatusThis read-only field 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.NOTE: This reserved bit must remain cleared (set to 0).0BGBEBandgap Buffer EnableEnables the bandgap buffer.0 Bandgap buffer not enabled1 Bandgap buffer enabledChapter 15 Power Management Controller (PMC)KL27 Sub-Family Reference Manual , Rev. 5, 01/2016Freescale Semiconductor, Inc. 247
