Pre-Production
WM8904
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
Left Input PGA Mute
0 = not muted
1 = muted
Input PGA Gain
Control
R44 (2Ch)
Analogue
Left Input 0
7
LINMUTE
1
Left Input PGA Volume
Input PGA Gain
Control
4:0
LIN_VOL [4:0]
0_0101
If L_MODE = 00 (Single ended)
OR L_MODE = 01 (Differential Line)
00000 = -1.5 dB
00001 = -1.3 dB
00010 = -1.0 dB
00011 = -0.7 dB
00100 = -0.3 dB
00101 = +0.0 dB (default)
00110 = +0.3 dB
00111 = +0.7 dB
01000 = +1.0 dB
01001 = +1.4 dB
01010 = +1.8 dB
01011 = +2.3 dB
01100 = +2.7 dB
01101 = +3.2 dB
01110 = +3.7 dB
01111 = +4.2 dB
10000 = +4.8 dB
10001 = +5.4 dB
10010 = +6.0 dB
10011 = +6.7 dB
10100 = +7.5 dB
10101 = +8.3 dB
10110 = +9.2 dB
10111 = +10.2 dB
11000 = +11.4 dB
11001 = +12.7 dB
11010 = +14.3 dB
11011 = +16.2 dB
11100 = +19.2 dB
11101 = +22.3 dB
11110 = +25.2 dB
11111 = +28.3 dB
If L_MODE = 10 (Differential MIC)
00000 = Reserved
00001 = +12 dB
00010 = +15 dB
00011 = +18 dB
00100 = +21 dB
00101 = +24 dB (default)
00110 = +27 dB
00111 to 11111 = +30 dB
Register 2Ch Analogue Left Input 0
PP, Rev 3.3, September 2012
155
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
