WM8321
Production Data
REFER TO
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
111 = SLEEP voltage / operating mode transition in
Timeslot 1
If DC-DC4 is assigned to a Hardware Enable Input,
then codes 001-101 select in which timeslot the
converter enters its SLEEP condition.
9:8
6:0
DC4_SLP_MO
DE [1:0]
11
DC-DC4 SLEEP Operating Mode
00 = Forced Continuous Conduction Mode
01 = Continuous / Discontinuous Conduction with
Pulse-Skipping
10 = LDO Mode
11 = Hysteretic Mode
DC4_SLP_VSE
L [6:0]
DC-DC4 SLEEP Voltage select
0.85V to 3.4V in 25mV steps
000_0000
00h = 0.85V
01h = 0.875V
…
65h = 3.375V
66h to 7Fh = 3.4V
Register 4067h DC4 SLEEP Control
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
R16488
(4068h)
LDO1
LDO1_ERR_A
CT [1:0]
LDO1 Error Action (Undervoltage)
00 = Ignore
15:14
00
01 = Shut down regulator
Control
10 = Shut down system (Device Reset)
11 = Reserved
Note that an Interrupt is always raised.
LDO1 Hardware Control Source
00 = Disabled
LDO1_HWC_S
RC [1:0]
12:11
00
01 = Hardware Control 1
10 = Hardware Control 2
11 = Hardware Control 1 or 2
LDO1 Hardware Control Voltage select
0 = Set by LDO1_ON_VSEL
1 = Set by LDO1_SLP_VSEL
LDO1 Hardware Control Operating Mode
00 = Low Power mode
10
LDO1_HWC_V
SEL
0
LDO1_HWC_M
ODE [1:0]
9:8
10
01 = Turn converter off
10 = Low Power mode
11 = Set by LDO1_ON_MODE
LDO1 Output float
LDO1_FLT
LDO1_SWI
7
6
0
0
0
0
0 = LDO1 output discharged when disabled
1 = LDO1 output floating when disabled
LDO1 Switch Mode
0 = LDO mode
1 = Switch mode
LDO1_LP_MO
DE
LDO1 Low Power Mode Select
0 = 50mA (reduced quiescent current)
1 = 20mA (minimum quiescent current)
Selects which Low Power mode is used in ON, SLEEP,
PD, February 2012, Rev 4.0
200
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
