WM8321
Production Data
REFER TO
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
DC-DC4 Clock Phase Control
DC4_PHASE
12
0
0 = Normal
1 = Inverted
DC4_FLT
DC-DC4 Output float
7
0
0 = DC-DC4 output discharged when disabled
1 = DC-DC4 output floating when disabled
DC-DC4 Soft-Start Control
DC4_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-DC4 Current Limit
DC4_STNBY_L
IM [1:0]
3:2
01
Sets the maximum DC output current in Hysteretic
Mode.
00 = 50mA
01 = 100mA
10 = 200mA
11 = 400mA
Protected by security key.
DC-DC4 Output Capacitor
00 = 10uF to 20uF
01 = 10uF to 20uF
10 = 22uF to 45uF
11 = 47uF to 100uF
1:0
DC4_CAP [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 4064h DC4 Control 1
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
R16485
(4065h) DC4
Control 2
DC4_ERR_AC
T [1:0]
DC-DC4 Error Action (Undervoltage)
00 = Ignore
15:14
00
01 = Shut down converter
10 = Shut down system (Device Reset)
11 = Reserved
Note that an Interrupt is always raised.
DC-DC4 Hardware Control Source
00 = Disabled
DC4_HWC_SR
C [1:0]
12:11
00
01 = Hardware Control 1
10 = Hardware Control 2
11 = Hardware Control 1 or 2
DC-DC4 Hardware Control Voltage select
0 = Set by DC4_ON_VSEL
1 = Set by DC4_SLP_VSEL
DC-DC4 Hardware Control Operating Mode
00 = Forced Continuous Conduction Mode
01 = Disabled
DC4_HWC_VS
EL
10
0
DC4_HWC_M
ODE [1:0]
9:8
11
10 = LDO Mode
11 = Hysteretic Mode
PD, February 2012, Rev 4.0
198
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
