wm8400 Wolfson Microelectronics plc, wm8400 Datasheet - Page 187

• Manufacturer Part Number: wm8400
• Description: Wolfson Audioplustm Hi-fi Audio Codec And Power Management Unit For Mobile Multimedia
• Manufacturer: Wolfson Microelectronics plc

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Pre-Production
R71 (47h)
DCDC1
Control 2
R72 (48h)
DCDC2
Control 1
REGISTER
ADDRESS
15:14
13
12:10
9:8
7
6:0
15
14
13
12
11
10
9:8
7
BIT
DC1_CAP
DC1_FRC_PWM
DC1_STBY_LIM
[1:0]
DC1_ACT_LIM
DC1_VIMG [6:0]
DC2_ENA
DC2_ACTIVE
DC2_SLEEP
DC2_ERRACT
DC2_HIB_MODE
DC2_SOFTST [1:0]
DC2_OV_PROT
LABEL
0b
000b
00b
0b
0000000b
0b
1b
0b
0b
0b
1b
00b
0b
DEFAULT
01
DC-DC1 Output Capacitor
00 = Reserved
01 = 10µF
10 = 22µF
11 = 47µF
DC1 Force PWM operation
0 = Not selected
1 = PWM operation forced
Reserved - Do Not Change
DC1 Standby Mode current limit
If DC1_ACT_LIM = 0:
00 = 70mA
01 = 150mA
10 = 300mA
11 = 600mA
If DC1_ACT_LIM = 1:
00 = 110mA
01 = 220mA
10 = 450mA
11 = 900mA
DC1 Active Mode current limit
0 = 600mA
1 = 1000mA
DC1 Hibernate Mode output voltage
0.85v to 4.025v in 0.025v steps
See Table 88 for details
DC2 Software enable
0 = Disabled
1 = Enabled
DC2 Active Mode select
0 = Standby/Hysteretic Mode selected
1 = Active Mode selected
DC2 Sleep Mode select
0 = Not selected
1 = Selected
Reserved - Do Not Change
DC2 Undervoltage Error Action
0 = Generate IRQ only
1 = Generate IRQ, Assert NRST, De-assert PWRGOOD,
Shutdown device
DC2 Hibernate Mode
0 = DC2 disabled in Hibernate
1 = DC2 enabled (LDO mode) in Hibernate
DC2 Soft Start
00 = No soft start
01 = 400us steps
10 = 4ms steps
11 = 40ms steps
DC2 Overvoltage Protection
0 = Disabled
1 = Enabled
DESCRIPTION
PP, April 2009, Rev 3.0
WM8400
187