APW8855 Datasheet, PDF (25/43 Pages) Anpec Electronics Coropration – High Current, High Frequency 7 Outputs Voltage Regulator and Power Management IC for High Performance Tablet and Ultra Notebook Applications

APW8855
14.3 VR2 Register Table
Addres s
Fie ld Na me
Data B it
Bit Na me
Read/Write
Po wer On De fa ult
Bit Name
3V 3_ALW _VS EL
0x03
3V3 _ALW DAC [7:0]
D7
D6
D5
D4
D3
3 V3_ ALW_ VSE L
R/W
R/W
R/W
R/W
R/W
0
0
0
1
0
Bit Definition
0 0h : shutdown
0 1h : V R2 &V3V3_ALW_LDO Vol tag e = 2 900mV.
0 2h : V R2 &V3V3_ALW_LDO Vol tag e = 2 920mV.
0 3h : V R2 &V3V3_ALW_LDO Vol tag e = 2 940mV.
…
1 5h : V R2 &V_{3V3_ALW_LDO} Vol tag e = 3 300mV (De fau lt)
….
3 8h : V R2 &V_{3V3_ALW_LDO} Vol tag e = 4 000mV.
D2
R/W
1
D1
R/W
0
D0
R/W
1
Addres s
Fie ld Na me
Data B it
Bit Na me
Read/Write
Po wer On De fa ult
Bit Name
3V 3_ALW __E N
3V 3_ALW __S EL
3V3_ALW_FSW_S EL
3V3_ALW_SL EW
0x0 4
3V 3_ALW CONTROL [7:0 ]
D7
D6
D5
D4
D3
D2
D1
D0
Reserved
3V3_ ALW _SLEW
R/W
R/W
3V 3_A LW_FSW _SEL
3 V3_A LW_ 3V 3_A LW_
_ SEL
_ EN
R/W
R/W
R/W
R/W
0
0
1
0
0
0
Bit Definition
0: V R2 o ff (De fau lt)
1: V R2 on
0: V R2 o n/off i s controlle d by CTL (Defaul t)
1: V R2 o n/off i s controlle d by 3V 3_ALW_EN State
00 : FSW = 1.0MHz at PWM mod e.
01 : FSW = 0.6MHz at PWM mod e.
10 : FSW = 0.8MHz at PWM mod e. (Defau lt)
11 : FSW = 1.2MHz a t PWM mode.
00 : Transition sl ew ra te = 1 0mV/us. (Default)
01 : Transition sl ew ra te = 1 5mV/us.
10 : Transition sl ew ra te = 2 0mV/us.
11 : Tra nsitio n sle w rate = 25mV /u s
Copyright © ANPEC Electronics Corp.
25
Rev. A.1 - Dec., 2015
www.anpec.com.tw