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.
For internal use only.
7
6
5
4
3
2
1
0
7
x
0
0
1
1
0
1
0
1
1
W/R
W/R
x
VSETBB[5]
VSETBB[4]
VSETBB[3]
VSETBB[2]
VSETBB[1]
VSETBB[0]
ONBB
Voltage setting for back-up battery charger, default 2.7V.
This byte only could be written when the UNLOCBB is set to 1.
Refer to the table of VBBAT VOLTAGE SETTINGS for details.
0xC8
W/R
Set 1 enable, set 0 disable the back-up battery charger.
W/R
W/R
Set 1 enable the always-on LDO, which powers the RTC block.
Set 0 disable the always-on LDO for saving power when not used.
6
ONRTC
1
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
RFU
0
0
x
x
x
x
0
0
1
0
0
1
0
0
0
1
0
1
0
1
0
0
WE/R Reserved for future use.
UNLOCKBB
SCRATCH[3]
SCRATCH[2]
SCRATCH[1]
SCRATCH[0]
x
W/R Set 1 to allow change the back-up battery charger output voltage.
BBU
0xC9
4 bits register for the equipment system to use. Data in those bits
are kept until both the main battery and back-up battery loses.
W/R
For internal use only.
For internal use only.
W/R
W/R
x
Always-on LDO output voltage setting, default is 1.8V.
Refer to the STEP-DOWN DC/DC AND LDO OUTPUT VOLT-
AGE SETTING table for details.
VSETRTC[5]
VSETRTC[4]
VSETRTC[3]
VSETRTC[2]
VSETRTC[1]
VSETRTC[0]
VSET[3]
0xCA
W/R
Battery regulation voltage setting for the voltage output in the top-
off state. The ENVISET[ ] has to be set to 1 for changing these
bits.
VSET[2]
W/R
W/R
Refer to the table of CHARGER VOLTAGE SETTING for details.
VSET[1]
VSET[0]
CHG
0xD0
Fast charge current setting for the maximum current for fast
charge. The ENVISET[ ] has to be set to1 for changing these bits.
Refer to the table of FAST CHARGING CURRENT SETTING for
details.
ISET[3]
ISET[2]
ISET[1]
ISET[0]
Note:
W/R: Write and read accessible. WE/R: Write and read accessible, write exact what it is before to avoid unexpected
behavior. X is uncertain volume.
www.active-semi.com
Copyright © 2013 Active-Semi, Inc.
Active-Semi Confidential―Do Not Copy or Distribute
ActivePMUTM and ActivePathTM are trademarks of Active-Semi.
I2CTM is a trademark of NXP.
- 34 -
ACTIVE-SEMI [ ACTIVE-SEMI, INC ]
