WM8903LGEFK/RV Wolfson Microelectronics, WM8903LGEFK/RV Datasheet - Page 118

• Manufacturer Part Number: WM8903LGEFK/RV
• Description: Audio CODECs ULTRA LOW PWR HI FI CODEC
• Manufacturer: Wolfson Microelectronics

Specifications of WM8903LGEFK/RV

• Audio Codec Type: Stereo Codec
• No. Of Adcs: 2
• No. Of Dacs: 2
• No. Of Input Channels: 6
• No. Of Output Channels: 8
• Adc / Dac Resolution: 24bit
• Sampling Rate: 96kHz
• Operating Temperature Range: -40°C To +85°C
• Rohs Compliant: Yes
• Adcs / Dacs Signal To Noise Ratio: 96dB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WM8903
R5 (05h)
VMID
Control 0
Register 05h VMID Control 0
R6 (06h) Mic
Bias Control
0
Register 06h Mic Bias Control 0
w
REGISTER
REGISTER
ADDRESS
ADDRESS
BIT
7:6
5:4
3:2
4:3
2:1
BIT
1
0
7
6
5
0
MICSHORT_THR[1:0]
VMID_SOFT[1:0]
VMID_BUF_ENA
VMID_TIE_ENA
VMID_RES[1:0]
MICDET_THR [1:0]
VMID_IO_ENA
BUFIO_ENA
MICBIAS_ENA
MICDET_ENA
LABEL
Reserved
LABEL
DEFAULT
00
00
0
0
0
0
DEFAULT
00
00
00
0
0
VMID buffer to Differential Lineouts
0 = Disabled
1 = Enabled
(only applies when relevant outputs are disabled, ie.
SPLK=0 or SPKR=0. Resistance is controlled by
VROI.)
VMID buffer to unused input and output pins.
0 = Disabled
1 = Enabled
Enables the Start-Up bias current generator
0 = Disabled
1 = Enabled
(same functionality as STARTUP_BIAS_ENA)
VMID soft start enable / slew rate control
00 = Disabled
01 = Fast soft start
10 = Nominal soft start
11 = Slow soft start
VMID Divider Enable and Select
00 = VMID disabled (for OFF mode)
01 = 2 x 50k divider (for normal operation)
10 = 2 x 250k divider (for low power standby)
11 = 2 x 5k divider (for fast start-up)
VMID Buffer Enable
0 = Disabled
1 = Enabled
Reserved. Writing ‘1’ to these register bits will
have no effect.
MICBIAS Current Detect Insertion Threshold
00 = 0.063mA
01 = 0.26mA
10 = 0.45mA
11 = 0.635mA
If AVDD
MICBIAS Short Circuit Button Push Threshold
00 = 0.52mA
01 = 0.77mA
10 = 1.2mA
11 = 1.43mA
If AVDD
MICBIAS Current and Short Circuit Detect
Enable
0 = disabled
1 = enabled
MICBIAS Enable
0 = disabled
1 = enabled
≠
≠
1.8, values are scaled
1.8, values are scaled
DESCRIPTION
DESCRIPTION
PP, Rev 3.1, August 2009
Pre-Production
118