wm8351 Wolfson Microelectronics plc, wm8351 Datasheet - Page 298
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wm8351
Manufacturer Part Number
wm8351
Description
Wolfson Audioplus? Stereo Codec With Power Management
Manufacturer
Wolfson Microelectronics plc
Datasheet
1.WM8351.pdf
(328 pages)
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WM8351
Register BEh DCDC4 Timeouts
REGISTER
w
REGISTER
ADDRESS
DCDC4 Low
ADDRESS
R190 (BEh)
R191 (BFh)
Timeouts
DCDC4
Power
14:12
15:14
13:10
BIT
BIT
9:8
6:0
9:6
DC4_HIB_MODE[2:0]
DC4_ERRACT[1:0]
DC4_ENSLOT[3:0]
DC4_SDSLOT[3:0]
DC4_HIB_TRIG[1:0]
DC4_VIMG[6:0]
LABEL
LABEL
DEFAULT
DEFAULT
000_0110
0000
0010
0011
0101
0000
00
000
00
Time slot for DC-DC4 start-up
0000 = Disabled (do not start up)
0001 = Start-up in time slot 1
… (total 14 slots available)
1110 = Start-up in time slot 14
1111 = Start-up on entering ACTIVE
Reset by state machine. Default held in metal
mask.
Action to take on DC-DC4 fault (as well as
generating an interrupt):
00 = ignore
01 = shut down converter
10 = shut down system
11 = reserved (shut down system)
Reset by state machine. Default held in metal
mask.
Time slot for DC-DC4 shutdown.
0000 = Shut down on entering OFF
0001 = Shutdown in time slot 1
…. (total 14 slots available)
1110 = Shutdown in time slot 14
1111 = Shut down on entering OFF
DC-DC4 Hibernate behaviour:
000 = Use current settings (no change)
001 = Select voltage image settings
010 = Force standby mode
011 = Force standby mode and voltage image
settings.
100 = Force LDO mode
101 = Force LDO mode and voltage image
settings.
110 = Reserved.
111 = Disable output
Reset by state machine. Default held in metal
mask.
DC-DC4 Hibernate signal select
00 = HIBERNATE register bit
01 = L_PWR1
10 = L_PWR2
11 = L_PWR3
Note that Hibernate is also selected when a
GPIO Hibernate input is asserted.
Reset by state machine. Default held in metal
mask.
DC-DC4 Converter output image voltage settings
in 25mv steps.
Maximum output = 3.4V.
110 0110 = 3.4V
110 0010 = 3.3V
DESCRIPTION
DESCRIPTION
PD, June 2009, Rev 4.1
REFER TO
REFER TO
Production Data
298
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