WM8900LGEFK/RV Wolfson Microelectronics, WM8900LGEFK/RV Datasheet - Page 112

• Manufacturer Part Number: WM8900LGEFK/RV
• Description: Audio CODECs Ultra Low Power Hi-Fi CODEC
• Manufacturer: Wolfson Microelectronics

Specifications of WM8900LGEFK/RV

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WM8900
Table 76 Stereo DAC to Line Output 1 - Recommended Power up Sequence and Device Register Settings
Note:
These sequences are optimised for best audio performance and minimal pops; however a faster power up sequence can be
gained by reducing the delay time at the expense of reducing the pop suppression capability of the device
w
0x1E
0x01
0x1E
0x02
0x1E
0x01
0x01
0x1E
0x01
0x03
0x0A
0x2C
0x2D
0x33
0x34
INDEX
REG
DATA VALUE READ
0x0102
100ms
Delay
0x0100
0x011A
0xC180
0x001A
0x0101
200 ms
Delay
0x0109
0x0002
0x0009
0x008F
0x0000
0x0150
0x0150
0x01B9
0x01B9
WRITE
OR
Register Settings:
SINGLE ENDED MIC INPUT (L/RINPUT1) TO STEREO ADC
The following section details the configuration for single-ended stereo microphone input
(L/RINPUT1) to stereo ADC. Slave mode, 24-bit I2S digital audio interface.
Set OUT1_DIS=1 (Enable), OUT2_DIS=0
Delay (100ms) to remove any residual charge on LINEOUT_1
Set STARTUP_BIAS_ENA=1, BIAS_ENA=0
Set BIAS_SRC=1, VMID_SOFTST=1
Set OUT1L_ENA=1, OUT1R_ENA=1
Reset OUT1_DIS=0, Leave BIAS_SRC=1, VMID_SOFTST=1
Set VMID_MODE=01 (2x50K Ohm Divider)
Delay (200ms) to allow VMID to initially charge
Set BIAS_ENA=1, VMID_MODE remains the same
Reset BIAS_SRC=0, VMID_SOFTST=0 (Disable)
Set BIAS_ENA=0
Set CP_ENA=1, OUT2L_ENA=0, OUT2R_ENA=0, MIXOUTL_ENA=1,
MIXOUTR_ENA=1, DACL_ENA=1, DACR_ENA=1
AIF_LRCLKRATE=0, DAC_MONO=0, DAC_SB_FILT=0, DAC_MUTERATE=0,
DAC_MUTEMODE=0, DEEMP=00, DAC_MUTE=0, DACL_DATINV=0,
DACR_DATINV=0
DACL_TO_MIXOUTL=1, IN3L_TO_MIXOUTL=0, IN3L_MIXOUTL_VOL=101, DAC_LP=0,
DAC_LP_VOL=0
DACR_TO_MIXOUTR=1, IN3R_TO_MIXOUTR=0, IN3R_MIXOUTR_VOL=101
OUT1_VU=1, OUT1R_ZC=1, OUT1R_MUTE=0, OUT1R_VOL=0dB
OUT1_VU=1, OUT1L_ZC=1, OUT1L_MUTE=0, OUT1L_VOL=0dB
COMMENT
PD, August 2008, Rev 4.0
Production Data
112