Voltage Regulator System (VREG) Control
Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
VSPER[7:0] | |||||||||
Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
VSVSTEP[3:0] | |||||||||
Access | R/W | R/W | R/W | R/W | |||||
Reset | 0 | 0 | 0 | 0 |
Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
VREFSEL | LPEFF | ||||||||
Access | R/W | R/W | |||||||
Reset | 0 | 0 |
Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
RUNSTDBY | STDBYPL0 | SEL[1:0] | ENABLE | ||||||
Access | R/W | R/W | R/W | R/W | R/W | ||||
Reset | 0 | 1 | 0 | 0 | 1 |
Voltage Scaling Period
This bitfield sets the period between the voltage steps when the VDDCORE voltage is changing in µs.
If VSPER=0, the period between two voltage steps is 1µs.
Voltage Scaling Voltage Step
This field sets the voltage step height when the VDDCORE voltage is changing to reach the target VDDCORE voltage.
The voltage step is equal to 2VSVSTEP* min_step.
See the Electrical Characteristics chapters for the min_step voltage level.
Voltage Regulator Voltage Reference Selection
Value | Description |
---|---|
0 | Selects VREF for the voltage regulator. |
1 | Selects ULPVREF for the voltage regulator. |
Low power Mode Efficiency
Value | Description |
---|---|
0 | The voltage regulator in Low power mode has the default efficiency and supports the whole VDD range (1.62V to 3.63V). |
1 | The voltage regulator in Low power mode has the highest efficiency and supports a limited VDD range (2.5V to 3.63V). |
Run in Standby
Value | Description |
---|---|
0 | The voltage regulator is in low power mode in Standby sleep mode. |
1 | The voltage regulator is in normal mode in Standby sleep mode. |
Standby in PL0
Value | Description |
---|---|
0 | In Standby sleep mode, the voltage regulator remains in the current performance level. |
1 | In Standby sleep mode, the voltage regulator is used in PL0. |
Voltage Regulator Selection
Value | Description |
---|---|
0 | The voltage regulator in active mode is a LDO voltage regulator. |
1 | The voltage regulator in active mode is a buck converter. |
2-3 | Reserved |
Must Be Set to 1.