WM8326 Datasheet, PDF (193/255 Pages) Wolfson Microelectronics plc – Processor Power Management Subsystem

Production Data
REGISTER
ADDRESS
R16474
(405Ah)
DC1 DVS
Control
BIT
LABEL
12:11 DC1_DVS_SR
C [1:0]
6:0 DC1_DVS_VS
EL [6:0]
DEFAULT
DESCRIPTION
00
000_0000
DC-DC1 DVS Control Source
00 = Disabled
01 = Enabled
10 = Controlled by Hardware DVS1
11 = Controlled by Hardware DVS2
DC-DC1 DVS Voltage select
0.6V to 1.8V in 12.5mV steps
00h to 08h = 0.6V
09h = 0.6125V
…
48h = 1.4V (see note)
…
67h = 1.7875V
68h to 7Fh = 1.8V
Register 405Ah DC1 DVS Control
Note - Maximum output voltage selection in 4MHz
switching mode is 48h (1.4V).
WM8326
REFER TO
REGISTER
ADDRESS
R16475
(405Bh)
DC2 Control
1
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
15:14 DC2_RATE
[1:0]
10
DC-DC2 Voltage Ramp rate
00 = 1 step every 32us
01 = 1 step every 16us
10 = 1 step every 8us
11 = Immediate voltage change
12 DC2_PHASE
1
DC-DC2 Clock Phase Control
0 = Normal
1 = Inverted
9:8 DC2_FREQ
[1:0]
00
DC-DC2 Switching Frequency
00 = Reserved
01 = 2.0MHz (2.2uH output inductor)
10 = 4.0MHz (1uH output inductor)
11 = Reserved
This field can only be written to by loading configuration
settings from OTP/ICE. In all other cases, this field is
Read Only.
7 DC2_FLT
0
DC-DC2 Output float
0 = DC-DC2 output discharged when disabled
1 = DC-DC2 output floating when disabled
5:4 DC2_SOFT_ST
00
DC-DC2 Soft-Start Control
ART [1:0]
(Duration in each of the 8 startup current limiting steps.)
00 = 32us steps
01 = 64us steps
10 = 128us steps
11 = 256us steps
1:0 DC2_CAP [1:0]
00
DC-DC2 Output Capacitor
00 = Reserved
01 = Reserved
10 = 22uF to 47uF
11 = Reserved
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PD, June 2012, Rev 4.0
193