NXP Semiconductors KL25 Series - System Options Register 1 (SIM_SOPT1)

12.2.1 System Options Register 1 (SIM_SOPT1)
NOTE
The SOPT1 register is only reset on POR or LVD.
Address: 4004_7000h base + 0h offset = 4004_7000h
Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
R
USBREGEN
USBSSTBY USBVSTBY
0
OSC32KSEL
0
W
Reset
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Bit
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R
0
Reserved
W
Reset
0 0 0 0 0 0 0 0 0 0 * * * * * *
* Notes:
Reserved field: Device specific value.•
SIM_SOPT1 field descriptions
Field Description
31
USBREGEN
USB voltage regulator enable
Controls whether the USB voltage regulator is enabled.
0 USB voltage regulator is disabled.
1 USB voltage regulator is enabled.
30
USBSSTBY
USB 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 VLLS
modes.
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.
29
USBVSTBY
USB voltage regulator in standby mode during VLPR and VLPW modes
Controls 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.
28–20
Reserved
This 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)
KL25 Sub-Family Reference Manual, Rev. 3, September 2012
Freescale Semiconductor, Inc. 193