APW8855 Datasheet, PDF (27/43 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
14.5 VR4 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 5_ALW _VS EL
0x07
1V5 _ALW DAC [7:0]
D7
D6
D5
D4
D3
D2
1 V5_ ALW_ VSE L
R/W
R/W
R/W
R/W
R/W
R/W
0
1
0
0
0
1
Bit Definition
0 0h : shutdown
0 1h : V R4 Voltage = 8 00mV.
0 2h : V R4 Voltage = 8 10mV.
0 3h : V R4 Voltage = 8 20mV.
…
4 7h : V R4 Voltage = 1 500mV (Default)
….
7 9h : V R4 Voltage = 2 000mV.
8 0h~ffh : Reserved
D1
R/W
1
D0
R/W
1
Address
Field Nam e
Da ta B it
Bit Name
Re ad/Write
Power On Defaul t
Bit Na me
1V5 _ALW __EN
1V5 _ALW __SE L
1V5 _ALW _FSW_SEL
1V5 _ALW _SLEW
0 x08
V1V5 _ALW CO NTROL [7:0]
D7
D6
D5
D4
D3
D2
D1
D0
Reser ved
1V5_A LW_S LEW
R/W
R/W
1V 5_ALW_FSW _SE L
1V 5_A LW_
_S EL
1V5 _ALW _
_E N
R/W
R/W
R/W
R/W
0
0
0
1
0
0
Bit De finition
0 : VR4 off (Default)
1 : VR4 on
0 : VR4 on/off is con tro lled by CTL (Defa ult)
1 : VR4 on/off is con tro lled by 1V5_ALW_ EN State
0 0 : FSW = 3.0 MHz at PW M mode.
0 1 : FSW = 2.0 MHz at PW M mode. (Default)
1 0 : FSW = 1.0 MHz at PW M mode.
11 : FSW = 4.0MHz at PWM mod e.
0 0 : Tran si tio n slew rate = 10mV/us. ( De fa ult)
0 1 : Tran si tio n slew rate = 15mV/us.
1 0 : Tran si tio n slew rate = 20mV/us.
11: Transition slew r ate = 25mV/us
Copyright © ANPEC Electronics Corp.
27
Rev. A.1 - Dec., 2015
www.anpec.com.tw