ACT8935
Rev 4, 17-Sep-13
REGISTER AND BIT DESCRIPTIONS CONT’D
OUTPUT ADDRESS BIT
NAME
ACCESS
DESCRIPTION
REG2
REG2
REG2
REG2
0x30
0x30
0x31
0x32
[7:6]
[5:0]
[7:0]
[7]
-
R
Reserved.
Output Voltage Selection. See the Output Voltage
Programming section for more information.
VSET
-
R/W
R
Reserved.
Regulator Enable Bit. Set bit to 1 to enable the regulator, clear
bit to 0 to disable the regulator.
ON
R/W
Regulator Phase Control. Set bit to 1 for the regulator to
operate 180° out of phase with the oscillator, clear bit to 0 for
the regulator to operate in phase with the oscillator.
REG2
REG2
0x32
0x32
[6]
[5]
PHASE
MODE
R/W
R/W
Regulator Mode Select. Set bit to 1 for fixed-frequency PWM
under all load conditions, clear bit to 0 to transit to power-
savings mode under light-load conditions.
Regulator Turn-On Delay Control. See the REG1, REG2,
REG3 Turn-on Delay section for more information.
REG2
REG2
0x32
0x32
[4:2]
[1]
DELAY
R/W
R/W
Regulator Fault Mask Control. Set bit to 1 enable fault-
interrupts, clear bit to 0 to disable fault-interrupts.
nFLTMSK
Regulator Power-OK Status. Value is 1 when output voltage
exceeds the power-OK threshold, value is 0 otherwise.
REG2
REG3
REG3
REG3
REG3
0x32
0x40
0x40
0x41
0x42
[0]
OK
R
R
[7:6]
[5:0]
[7:0]
[7]
-
VSET
-
Reserved.
Output Voltage Selection. See the Output Voltage
Programming section for more information.
R/W
R
Reserved.
Regulator Enable Bit. Set bit to 1 to enable the regulator, clear
bit to 0 to disable the regulator.
ON
R/W
Configures regulator behavior with respect to the PBIN input.
Set bit to 0 to enable regulator when PBIN is asserted
REG3
REG3
0x42
0x42
[6]
[5]
PWRSTAT
MODE
R/W
R/W
Regulator Mode Select. Set bit to 1 for fixed-frequency PWM
under all load conditions, clear bit to 0 to transit to power-
savings mode under light-load conditions.
Regulator Turn-On Delay Control. See the REG1, REG2,
REG3 Turn-on Delay section for more information.
REG3
REG3
0x42
0x42
[4:2]
[1]
DELAY
R/W
R/W
Regulator Fault Mask Control. Set bit to 1 enable fault-
interrupts, clear bit to 0 to disable fault-interrupts.
nFLTMSK
Regulator Power-OK Status. Value is 1 when output voltage
exceeds the power-OK threshold, value is 0 otherwise.
REG3
REG4
REG4
0x42
0x50
0x50
[0]
OK
-
R
R
[7:6]
[5:0]
Reserved.
Output Voltage Selection. See the Output Voltage
Programming section for more information.
VSET
R/W
Regulator Enable Bit. Set bit to 1 to enable the regulator, clear
bit to 0 to disable the regulator.
REG4
REG4
0x51
0x51
[7]
[6]
ON
R/W
R/W
Output Discharge Control. When activated, LDO output is
discharged to GA through 1.5kꢀ resistor when in shutdown.
Set bit to 1 to enable output voltage discharge in shutdown,
clear bit to 0 to disable this function.
DIS
LDO Low-IQ Mode Control. Set bit to 1 for low-power
operating mode, clear bit to 0 for normal mode.
REG4
REG4
REG4
0x51
0x51
0x51
[5]
[4:2]
[1]
LOWIQ
DELAY
R/W
R/W
R/W
Regulator Turn-On Delay Control. See the REG4, REG5,
REG6, REG7 Turn-on Delay section for more information.
Regulator Fault Mask Control. Set bit to 1 enable fault-
interrupts, clear bit to 0 to disable fault-interrupts.
nFLTMSK
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