WM8900LGEFK/RV Wolfson Microelectronics, WM8900LGEFK/RV Datasheet - Page 110

• 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
APPLICATIONS INFORMATION
RECOMMENDED PATHS
Figure 63 Stereo DAC to Headphone Device Internal Signal Path
w
INDEX
0x3A
0x1E
0x01
0x1E
0x03
0x1E
0x01
0x01
0x1E
0x01
0x03
0x0A
0x2C
0x2D
REG
0x0030
0x0082
0x0100
0x009A
0x0060
0x001A
0x0101
400ms
Delay
0x0109
0x0002
0x0009
0x00EF
0x0000
0x0150
0x0150
VALUE
DATA
WRITE
READ
Write
Write
Write
Write
Write
Write
Write
Write
Write
Write
Write
Write
Write
Write
OR
STEREO DAC TO HEADPHONE
The following section details the configuration for stereo DAC to headphone output with charge
pump enabled. Slave mode, 24-bit I2S digital audio interface.
Block Diagram:
Register Settings:
Set CLAMP_IP=1, CLAMP_OP=1 (HP amp)
Set OUT2_DIS=1 (Enable), OUT1_DIS=0 (Disable)
Set STARTUP_BIAS_ENA=1
Set BIAS_SRC=1, VMID_SOFTST=1
Set OUT2L_ENA=1, OUT2R_ENA=1
Reset OUT2_DIS=0, Leave BIAS_SRC=1, VMID_SOFTST=1
Set VMID_MODE=01 (2x50K Ohm Divider)
Delay (400ms) to allow VMID to initially
Set BIAS_ENA=1, VMID_MODE remains the same
Reset BIAS_SRC=0, VMID_SOFTST=0 (Disable)
CHIP_REV=0000, STARTUP_BIAS_ENA=0, FLL_ENA=0, MICB_ENA=0, BIAS_ENA=1,
VMID_BUF_ENA=0, VMID_MODE=01
CP_ENA=1, OUT2L_ENA=1, OUT2R_ENA=1, MIXOUTL_ENA=1, MIXOUTR_ENA=1,
DACL_ENA=1, DACR_ENA=1
DAC_MUTE=0
DACL_TO_MIXOUTL=1
DACR_TO_MIXOUTR=1
COMMENT
PD, August 2008, Rev 4.0
Production Data
110