Production Data
WM8321
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
DC-DC2 DVS Control Source
REFER TO
R16479
(405Fh)
DC2 DVS
Control
DC2_DVS_SR
C [1:0]
12:11
00
00 = Disabled
01 = Enabled
10 = Controlled by Hardware DVS1
11 = Controlled by Hardware DVS2
DC-DC2 DVS Voltage select
0.6V to 1.8V in 12.5mV steps
DC2_DVS_VS
EL [6:0]
6:0
000_0000
00h to 08h = 0.6V
09h = 0.6125V
…
48h = 1.4V (see note)
…
67h = 1.7875V
68h to 7Fh = 1.8V
Note - Maximum output voltage selection in 4MHz
switching mode is 48h (1.4V).
Register 405Fh DC2 DVS Control
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
R16480
(4060h) DC3
Control 1
DC3_PHASE
DC-DC3 Clock Phase Control
0 = Normal
12
0
1 = Inverted
DC3_FLT
DC-DC3 Output float
7
0
0 = DC-DC3 output discharged when disabled
1 = DC-DC3 output floating when disabled
DC-DC3 Soft-Start Control
DC3_SOFT_ST
ART [1:0]
5:4
01
(Duration in each of the 3 intermediate startup current
limiting steps.)
00 = Immediate start-up
01 = 512us steps
10 = 4.096ms steps
11 = 32.768ms steps
DC-DC3 Current Limit
3:2
DC3_STNBY_L
IM [1:0]
01
Sets the maximum DC output current in Hysteretic
Mode.
00 = 50mA
01 = 100mA
10 = 200mA
11 = 400mA
Protected by security key.
DC-DC3 Output Capacitor
00 = 10uF to 20uF
01 = 10uF to 20uF
10 = 22uF to 45uF
11 = 47uF to 100uF
DC3_CAP [1:0]
1:0
00
This field can only be written to by loading configuration
settings from OTP/ICE. In all other cases, this field is
Read Only.
Register 4060h DC3 Control 1
PD, February 2012, Rev 4.0
195
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
