WM8903LGEFK/RV Wolfson Microelectronics, WM8903LGEFK/RV Datasheet - Page 64

• 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
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OUTPUT SIGNAL PATHS ENABLE
The output mixers and drivers can be independently enabled and disabled using the register bits
described in Table 38.
Note that the Headphone Outputs and Line Outputs are also controlled by fields located within
Register R90 and R94, which provide suppression of pops & clicks when enabling and disabling
these signal paths. These registers are described in the following “Headphone / Line Output Signal
Paths Enable” section.
Under recommended usage conditions, the pop suppression control bits will be configured by
scheduling the default Start-Up and Shut-Down sequences as described in the “Control Write
Sequencer” section. In these cases, the user does not need to set the register fields in R13, R14,
R15, R90 and R94 directly.
Table 38 Output Signal Paths Enable
To enable the output PGAs and mixers, the reference voltage VMID and the bias current must also
be enabled. See “Reference Voltages and Master Bias” for details of the associated controls
VMID_RES and BIAS_ENA.
R13 (0Dh)
Power
Management 1
R14 (0Eh)
Power
Management 2
R15 (0Fh)
Power
Management 3
R16 (10h)
Power
Management 4
R17 (11h)
Power
Management 5
REGISTER
ADDRESS
BIT
1
0
1
0
1
0
1
0
1
0
MIXOUTL_ENA
MIXOUTR_ENA
HPL_PGA_ENA
HPR_PGA_ENA
LINEOUTL_PGA_
ENA
LINEOUTR_PGA
_ENA
MIXSPKL_ENA
MIXSPKR_ENA
SPKL_ENA
SPKR_ENA
LABEL
DEFAULT
0
0
0
0
0
0
0
0
0
0
Left Output Mixer Enable
0 = disabled
1 = enabled
Right Output Mixer Enable
0 = disabled
1 = enabled
Left Headphone Output Enable
0 = disabled
1 = enabled
Right Headphone Output Enable
0 = disabled
1 = enabled
Left Line Output Enable
0 = disabled
1 = enabled
Right Line Output Enable
0 = disabled
1 = enabled
Left Speaker Mixer Enable
0 = disabled
1 = enabled
Right Speaker Mixer Enable
0 = disabled
1 = enabled
Left Speaker Output Enable
0 = disabled
1 = enabled
Right Speaker Output Enable
0 = disabled
1 = enabled
PD, Rev 4.0, September 2010
DESCRIPTION
Production Data
64