ACT5880
Rev 2, 03-Sep-13
REGISTER AND BIT DESCRIPTIONS CONT’D
DEFAULT
and
ACCESS
ADDRESS
and BIT
BLOCK
NAME
DESCRIPTION
For internal use only.
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
x
0
0
0
1
1
0
0
0
0
0
0
1
1
0
0
0
W/R
W/R
W/R
W/R
x
Voltage Setting for the REG1 output when VSEL=0. Default set-
ting is 1.2V. Refer to the STEP-DOWN DC/DC AND LDO OUT-
PUT VOLTAGE SETTING table for details.
VSET0[5]
VSET0[4]
VSET0[3]
VSET0[2]
VSET0[1]
VSET0[0]
x
0x10
W/R
For internal use only.
W/R
W/R
W/R
W/R
x
Voltage Setting for the REG1 when VSEL=1. Default setting is
VSET1[5]
VSET1[4]
VSET1[3]
VSET1[2]
VSET1[1]
VSET1[0]
1.2V (This voltage setting is also known as "Standby Voltage").
Refer to the STEP-DOWN DC/DC AND LDO OUTPUT VOLT-
AGE SETTING table for details.
0x11
W/R
W/R
REG1
Regulator On/Off Bit. Set bit to 1 to turn on the regulator, set bit
to 0 to turn off the regulator.
7
6
ON
1
0
Regulator Phase Control. Set bit to 1 for the regulator to operate
W/R 180° out of phase with the oscillator, set bit to 0 for the regulator
to operate in phase with the oscillator.
PHASE
Regulator Mode Select. Set bit to 1 for fixed-frequency PWM
W/R mode under all load conditions, set bit to 0 to allow PFM mode
under light-load conditions.
5
MODE
0
Regulator Turn-on Delay Control. DELAY[2:0]=000 for no delay.
Other code to delay relationship: 001 for 2ms, 010 for 4ms, 011
W/R for 8ms, 100 for 16ms, 101 for 32ms, 110 for 64ms and 111 for
128ms. There is a propagation delay for about 100μs if selecting
no delay.
4
3
DELAY[2]
DELAY[1]
0
0
0x12
2
DELAY[0]
0
Regulator Fault Interrupt Mask. Set bit to 1 to enable fault-
interrupt when the output is out of regulation, set bit to 0 to dis-
able fault-interrupt.
1
nFLTMSK
0
W/R
R
Regulator Power-OK Status. Value is 0 when the output is out of
regulation, value is 1 when the output is in regulation.
0
OK
R
Note:
W/R: Write and read accessible. R: Read accessible, writing to the bit does not make change to the volume. WE/R: Write
and read accessible, write exact what it is before to avoid unexpected behavior. X is uncertain volume.
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