wm8351 Wolfson Microelectronics plc, wm8351 Datasheet - Page 290

• Manufacturer Part Number: wm8351
• Description: Wolfson Audioplus? Stereo Codec With Power Management
• Manufacturer: Wolfson Microelectronics plc

WM8351
Register B0h DCDC/LDO requested
w
REGISTER
REGISTER
ADDRESS
ADDRESS
R177 (B1h)
options
DCDC
Active
13:12
BIT
BIT
15
3
2
0
2
1
0
DCDC_DISCLKS
DC4_ACTIVE
DC3_ACTIVE
DC1_ACTIVE
DC3_ENA
DC2_ENA
DC1_ENA
LABEL
PUTO[1:0]
LABEL
DEFAULT
DEFAULT
0
0
0
00
0
1
1
1
from actually switching on - see DCDC/LDO Status
register for actual converter status.
Reset by state machine. Default held in metal mask.
DCDC3 converter enable
0 = disabled
1 = enabled
Note: internal conditions may prevent the converter
from actually switching on - see DCDC/LDO Status
register for actual converter status.
Reset by state machine. Default held in metal mask.
DCDC2 converter enable
0 = disabled
1 = enabled
Note: internal conditions may prevent the converter
from actually switching on - see DCDC/LDO Status
register for actual converter status.
Reset by state machine. Default held in metal mask.
DCDC1 converter enable
0 = disabled
1 = enabled
Note: internal conditions may prevent the converter
from actually switching on - see DCDC/LDO Status
register for actual converter status.
Reset by state machine. Default held in metal mask.
DCDC clock enable
0 = DCDC Clocks enabled
1 = DCDC1, 3 and 4 clocks disabled.
Note: This feature is useful in reducing the current
consumption if all 3 Step-Down DC-DCs are in LDO
mode. The requirement is to put them in LDO mode
and then at least 100us is required before clocks are
disabled. Again while coming out of LDO mode first
enable the clocks and then at least 100us wait and
then come out of LDO mode. This can only be used
if the processor is alive to set and unset this bit.
Reset by state machine.
Power up time out value for all converters
00 = 0.5ms
01 = 2ms
10 = 32ms
11 = 256ms
Reset by state machine.
DC-DC 4 Active mode
0 = Select Standby mode
1 = Select Active mode
Reset by state machine.
DC-DC 3 Active mode
0 = Select Standby mode
1 = Select Active mode
Reset by state machine.
DC-DC 1 Active mode
DESCRIPTION
DESCRIPTION
PD, June 2009, Rev 4.1
REFER TO
REFER TO
Production Data
290