WM8959
Pre-Production
REGISTER
ADDRESS
BIT
LABEL
DIS_OUT3
DEFAULT
DESCRIPTION
3
2
1
0
0b
Discharges OUT3 output via approx 500Ω resistor
0 = Not active
1 = Actively discharging OUT3
Discharges OUT4 output via approx 500Ω resistor
0 = Not active
DIS_OUT4
DIS_LOUT
DIS_ROUT
0b
0b
0b
1 = Actively discharging OUT4
Discharges LOUT output via approx 500Ω resistor
0 = Not active
1 = Actively discharging LOUT
Discharges ROUT output via approx 500Ω resistor
0 = Not active
1 = Actively discharging ROUT
Reserved - Do Not Change
R57 (39h)
15:7
6
0000_000
0_0b
Anti-Pop (2)
SOFTST
0b
Enables VMID soft start
0 = Disabled
1 = Enabled
5:4
3
00b
0b
Reserved - Do Not Change
BUFIOEN
Enables the VGS / R current generator and the analogue input
and output bias
0 = Disabled
1 = Enabled
2
1
BUFDCOPEN
POBCTRL
0b
0b
Enables the VGS / R current generator
0 = Disabled
1 = Enabled
Selects the bias current source for output amplifiers and VMID
buffer
0 = VMID / R bias
1 = VGS / R bias
0
VMIDTOG
0b
Connects VMID to ground
0 = Disabled
1 = Enabled
R58 (3Ah)
15:8
7:6
00h
00b
Reserved - Do Not Change
MICBIAS Short Circuit Current Detect Threshold
00 = 600uA
Microphone
Bias
MCDSCTH
[1:0]
01 = 120uA
10 = 1800uA
11 = 2400uA
These values are for AVDD=3.3V and scale proportionally with
AVDD.
5:3
MDCTHR
[2:0]
000b
MICBIAS Current Detect Threshold
000 = 200uA
001 = 350uA
010 = 500uA
011 = 650uA
100 = 800uA
101 = 950uA
110 = 1100uA
111 = 1200uA
These values are for AVDD=3.3V and scale proportionally with
AVDD.
2
1
MCD
0b
0b
MICBIAS Current and Short Circuit Detect Enable
0 = disabled
1 = enabled
Reserved - Do Not Change
PP, May 2008, Rev 3.1
146
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
