wm9081 Wolfson Microelectronics plc, wm9081 Datasheet - Page 84

• Manufacturer Part Number: wm9081
• Description: Mono Dac With 2.6w Class Ab/d Speaker Driver, Dynamic Range Controller And Retune Mobile Parametric Equalizer
• Manufacturer: Wolfson Microelectronics plc

WM9081
Register 04h VMID Control
Register 05h Bias Control 1
w
Bias Control
REGISTER
REGISTER
REGISTER
ADDRESS
ADDRESS
ADDRESS
Analogue
R5 (05h)
R7 (07h)
1
BIT
BIT
BIT
2:1
3:2
3
0
6
5
4
1
0
4
VMID_SEL[1:0]
VMID_FAST_S
STARTUP_BIA
STBY_BIAS_E
STBY_BIAS_L
BIAS_LVL[1:0]
VMID_RAMP
BIAS_SRC
BIAS_ENA
DAC_SEL
LABEL
LABEL
S_ENA
LABEL
NA
VL
T
DEFAULT
DEFAULT
DEFAULT
00
10
0
1
1
1
0
0
0
0
VMID Soft Start control
0 = Normal
1 = Soft Start
VMID Divider Enable and Select
00 = VMID disabled (for OFF mode)
01 = 2 x 40kΩ divider (for normal operation)
10 = 2 x 240kΩ divider (for low power standby)
11 = 2 x 5kΩ divider (for fast start-up)
VMID Slew Rate control
0 = Slow
1 = Fast
Selects the bias current source
0 = Normal bias
1 = Start-Up bias
Standby bias current select
0 = Normal bias x 0.5
1 = Normal bias x 0.25
Selects the Standby bias level
0 = Disabled (Bias set by BIAS_LVL)
1 = Enabled (Bias set by STBY_BIAS_LVL)
Master bias current select
00 = Normal bias x 0.5
01 = Normal bias x 0.75
10 = Normal bias
11 = Normal bias x 1.5
Enables the Normal bias current generator (for all
analogue functions)
0 = Disabled
1 = Enabled
Enables the Start-Up bias current generator
0 = Disabled
1 = Enabled
DAC Path Enable
0 = Disabled
DESCRIPTION
DESCRIPTION
DESCRIPTION
PP, Rev 3.0, April 2009
Reference
Voltages
and master
bias
Reference
Voltages
and master
bias
Power
Managemen
t
Reference
Voltages
and master
bias
Reference
Voltages
and master
bias
Reference
Voltages
and master
bias
Reference
Voltages
and master
bias
Reference
Voltages
and master
bias
Reference
Voltages
and master
bias
Power
Managemen
t
Reference
Voltages
and master
bias
Signal Path
Control
REFER TO
REFER TO
REFER TO
Pre-Production
84