WM8321
Production Data
DESCRIPTION
ADDRESS
R16470 (4056h)
DC1 Control 1
BIT
LABEL
DEFAULT
DC1_RATE
[1:0]
DC-DC1 Voltage Ramp rate
00 = 1 step every 32us
15:14
10
01 = 1 step every 16us
10 = 1 step every 8us
11 = Immediate voltage change
DC-DC1 Clock Phase Control
0 = Normal
DC1_PHASE
12
0
1 = Inverted
DC1_FREQ
[1:0]
DC-DC1 Switching Frequency
00 = Reserved
9:8
00
01 = 2.0MHz (2.2uH output inductor)
10 = 4.0MHz (1uH output inductor)
11 = 4.0MHz (0.5uH output inductor)
This field can only be written to by
loading configuration settings from
OTP/ICE. In all other cases, this field
is Read Only.
DC1_FLT
DC-DC1 Output float
7
0
0 = DC-DC1 output discharged when
disabled
1 = DC-DC1 output floating when
disabled
DC1_SOFT_
START [1:0]
DC-DC1 Soft-Start Control
5:4
00
(Duration in each of the 8 startup
current limiting steps.)
00 = 32us steps
01 = 64us steps
10 = 128us steps
11 = 256us steps
DC1_CAP
[1:0]
DC-DC1 Output Capacitor
00 = 4.7uF to 20uF
01 = Reserved
1:0
00
10 = 22uF to 47uF
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.
R16471 (4057h)
DC1 Control 2
DC1_ERR_A
CT [1:0]
DC-DC1 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.
DC1_HWC_
SRC [1:0]
DC-DC1 Hardware Control Source
00 = Disabled
12:11
00
01 = Hardware Control 1
10 = Hardware Control 2
11 = Hardware Control 1 or 2
DC1_HWC_
VSEL
DC-DC1 Hardware Control Voltage
select
10
0
0 = Set by DC1_ON_VSEL
1 = Set by DC1_SLP_VSEL
PD, February 2012, Rev 4.0
70
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
