APW8855 Datasheet, PDF (26/43 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
14.4 VR3 Register Table
Addres s
Fie ld Na me
Data B it
Bit Na me
Read/Write
Po wer On De fa ult
Bit Name
1V 8_ALW _VS EL
0x05
1V8 _ALW DAC [7:0]
D7
D6
D5
D4
D3
D2
1 V8_ ALW_ VSE L
R/W
R/W
R/W
R/W
R/W
R/W
0
0
1
0
0
1
Bit Definition
0 0h : shutdown
0 1h : V R3 Voltage = 1 450mV.
0 2h : V R3 Voltage = 1 460mV.
0 3h : V R3 Voltage = 1 470mV.
…
2 4h : V R3 Voltage = 1 800mV (Default)
….
5 1h : V R3 Voltage = 2 250mV.
5 2h~ffh : Reserved
D1
R/W
0
D0
R/W
0
Addres s
Fie ld Na me
Data B it
Bit Na me
Read/Write
Po wer On De fa ult
Bit Name
1V 8_ALW __E N
1V 8_ALW __S EL
1V8_ALW_FSW_S EL
1V8ALW _SLEW
0x0 6
1V 8_ALW CONTROL [7:0 ]
D7
D6
D5
D4
D3
D2
D1
D0
Reserved
1V8_ ALW _SLEW
R/W
R/W
1V 8_A LW_FSW _SEL
1 V8_A LW_ 1V 8_A LW_
_ SEL
_ EN
R/W
R/W
R/W
R/W
0
0
0
1
0
0
Bit Definition
0: V R3 o ff (De fau lt)
1: V R3 on
0: V R3 o n/off i s controlle d by CTL (Defaul t)
1: V R3 o n/off i s controlle d by 1V 8_ALW_EN State
00 : FSW = 3.0MHz at PWM mod e.
01 : FSW = 2.0MHz at PWM mod e. (Defau lt)
10 : FSW = 1.0MHz at PWM mod e.
11 : FSW = 4.0MHz 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.
26
Rev. A.1 - Dec., 2015
www.anpec.com.tw