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WM8903 Datasheet(PDF) 142 Page - Wolfson Microelectronics plc

Part # WM8903
Description  Ultra Low Power CODEC for Portable Audio Applications
PDF  178 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8903 Datasheet(HTML) 142 Page - Wolfson Microelectronics plc

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WM8903
Production Data
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PD, Rev 4.5, June 2012
142
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
10000 = Reserved
10001 = CLK_SYS / 30
10010 = CLK_SYS / 32
10011 = CLK_SYS / 44
10100 = CLK_SYS / 48
Register 1Ah Audio Interface 2
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R27 (1Bh)
Audio
Interface 3
10:0
LRCLK_RATE
[10:0]
000_0010_0010 LRC Rate (Master Mode)
LRC clock output = BCLK / LRCLK_RATE
Integer (LSB = 1)
Valid range: 8 to 2047
50:50 LRCLK duty cycle is only guaranteed with
even values (8, 10, … 2046).
Register 1Bh Audio Interface 3
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R30 (1Eh)
DAC Digital
Volume Left
8
DACVU
0
DAC Volume Update
Writing a 1 to this bit causes left and right DAC
volume to be updated simultaneously
(Write-Only Register)
7:0
DACL_VOL
[7:0]
1100_0000 Left DAC Digital Volume
00h = Mute
01h = -71.625dB
02h = -71.250dB
… (0.375dB steps)
C0h to FFh = 0dB
Register 1Eh DAC Digital Volume Left
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R31 (1Fh)
DAC Digital
Volume Right
8
DACVU
0
DAC Volume Update
Writing a 1 to this bit causes left and right DAC
volume to be updated simultaneously
(Write-Only Register)
7:0
DACR_VOL
[7:0]
1100_0000 Right DAC Digital Volume
00h = Mute
01h = -71.625dB
02h = -71.250dB
… (0.375dB steps)
C0h to FFh = 0dB
Register 1Fh DAC Digital Volume Right



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