FUNC_DVFS Registers
67
SLVUAH1C – June 2015 – Revised April 2017
Copyright © 2015–2017, Texas Instruments Incorporated
Register Descriptions
3.6.1 SMPS_DVFS_CTRL Register (Address = 180h) [reset = 4h]
SMPS_DVFS_CTRL is shown in
and described in
Return to
SMPS DVFS control register
RESET register domain: SWORST (excepted DVFS_SMPS_SELECT (bit 4) on POR)
Figure 3-54. SMPS_DVFS_CTRL Register
7
6
5
4
3
2
1
0
RESERVED
DVFS_SMPS_
SELECT
DVFS_RESTO
RE_VALUE
DVFS_ENABL
E_RST
DVFS_OFFSE
T_STEP
DVFS_ENABL
E
R-0h
R/W-0h
R/W-0h
R/W-1h
R/W-0h
R/W-0h
Table 3-60. SMPS_DVFS_CTRL Register Field Descriptions
Bit
Field
Type
Reset
Description
7-5
RESERVED
R
0h
4
DVFS_SMPS_SELECT
R/W
0h
DVFS (I2C2_SCL, I2C2_SDA) SMPS selection
0: DVFS will control SMPS1(if single phase selected
SMPS_CTRL.SMPS12_SMPS1_SMPS2_EN=0) or SMPS12 (dual-
phase selected SMPS_CTRL.SMPS12_SMPS1_SMPS2_EN=1)
1: DVFS will control SMPS2(if single phase selected
SMPS_CTRL.SMPS12_SMPS1_SMPS2_EN=0) or SMPS12 (dual-
phase selected SMPS_CTRL.SMPS12_SMPS1_SMPS2_EN=1)
Note: The reset of this bit is on POR
3
DVFS_RESTORE_VALU
E
R/W
0h
Control the SMPS12 output voltage upon OFF to ACTIVE transition
controlled with ENABLE2 pins
0: upon OFF to ACTIVE transition controlled with ENABLE2 pins,
SMPS12 output voltage is set by SMPS12_VOLTAGE.VSEL register
1: upon OFF to ACTIVE transition controlled with ENABLE2 pins,
SMPS12 output voltage is set with the latest voltage (sum result of
the Offset value computed on PWM_DAT signal plus
SMPS12_FORCE.VSEL register) before ACTIVE to OFF. This value
is restored only if DVFS feature was already enabled
(DVFS_ENABLE=1) before ACTIVE to OFF transition controlled with
ENABLE2 pin.
2
DVFS_ENABLE_RST
R/W
1h
Control the DVFS Enable feature upon OFF to ACTIVE transition
controlled with ENABLE2 pin.
0: DVFS feature is automatically re-enabled upon OFF to ACTIVE
transition controlled with ENABLE2 pin if the feature was already
enabled ((DVFS_ENABLE=1) before ACTIVE to OFF transition
controlled with ENABLE2 pin
1: DVFS feature is not automatically enable (DVFS_ENABLE=0)
upon OFF to ACTIVE transition controlled with ENABLE2 pin. To
select the DVFS feature, the DVFS_ENABLE must be written to one
by SW
1
DVFS_OFFSET_STEP
R/W
0h
Selection of the offset step for DVFS function:
0: offset step of 10mV (default)
1: offset step of 20mV
0
DVFS_ENABLE
R/W
0h
Selection of the DVFS function:
0: DVFS is not enabled (default)
1: DVFS is enabled (Control of SMPS12)
DVFS function in link to I2C2_SCL and I2C2_SDA.