12.3.1 System Options Register 1 (SIM_SOPT1)NOTEThe SOPT1 register is only reset on POR or LVD.Address: 4004_7000h base + 0h offset = 4004_7000hBit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16RUSBREGENUSBSSTBYUSBVSTBY0OSC32KSEL OSC32KOUTWReset 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0R 0ReservedWReset 0 0 0 0 0 0 0 0 0 0 * * * * * ** Notes:Reserved field: Device specific value.•SIM_SOPT1 field descriptionsField Description31USBREGENUSB voltage regulator enableControls whether the USB voltage regulator is enabled.0 USB voltage regulator is disabled.1 USB voltage regulator is enabled.30USBSSTBYUSB voltage regulator in standby mode during Stop, VLPS, LLS and VLLS modes.Controls whether the USB voltage regulator is placed in standby mode during Stop, VLPS, LLS and VLLSmodes.0 USB voltage regulator not in standby during Stop, VLPS, LLS and VLLS modes.1 USB voltage regulator in standby during Stop, VLPS, LLS and VLLS modes.29USBVSTBYUSB voltage regulator in standby mode during VLPR and VLPW modesControls whether the USB voltage regulator is placed in standby mode during VLPR and VLPW modes.0 USB voltage regulator not in standby during VLPR and VLPW modes.1 USB voltage regulator in standby during VLPR and VLPW modes.28–20ReservedThis field is reserved.This read-only field is reserved and always has the value 0.Table continues on the next page...Chapter 12 System Integration Module (SIM)KL27 Sub-Family Reference Manual , Rev. 5, 01/2016Freescale Semiconductor, Inc. 145
