wm8903 Wolfson Microelectronics plc, wm8903 Datasheet - Page 117

• Manufacturer Part Number: wm8903
• Description: Ultra Low Power Codec For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

Pre-Production
REGISTER BITS BY ADDRESS
R0 (00h)
SW Reset
and ID
Register 00h SW Reset and ID
R1 (01h)
Revision
Number
Register 01h Revision Number
R4 (04h)
Bias Control
0
Register 04h Bias Control 0
w
REGISTER
ADDRESS
REGISTER
REGISTER
ADDRESS
ADDRESS
15:0
BIT
BIT
3:2
BIT
3:0
4
1
0
SW_RST_DEV_ID1[15:0] 1000_1001_0000_0011 Writing to this register resets all
STARTUP_BIAS_ENA
CHIP_REV[3:0]
LABEL
BIAS_ENA
POBCTRL
ISEL[1:0]
LABEL
LABEL
DEFAULT
0010
DEFAULT
10
1
0
0
DEFAULT
Reading from this register will indicate the Revision
ID.
Selects the bias current source for output
amplifiers and VMID buffer
0 = Default bias
1 = Start-Up bias
Master Bias control
00 = Normal bias x 0.5
01 = Normal bias x 0.75
10 = Normal bias
11 = Normal bias x 1.5
Enables the Start-Up bias current generator
0 = Disabled
1 = Enabled
Enables the Normal bias current generator (for
all analogue functions)
0 = Disabled
1 = Enabled
registers to their default state.
Reading from this register will indicate
Device ID 8903h.
DESCRIPTION
DESCRIPTION
DESCRIPTION
PP, Rev 3.1, August 2009
WM8903
117