Pre-Production
WM8959
REGISTER
ADDRESS
BIT
LABEL
OUT3ATTN
DEFAULT
DESCRIPTION
4
0b
OUT3 Attenuation
0 = 0dB
1 = -6dB
3:2
1
00b
1b
Reserved
OUT4MUTE
OUT4ATTN
OUT4 Mute
0 = Un-mute
1 = Mute
0
0b
OUT4 Attenuation
0 = 0dB
1 = -6dB
R32 (20h)
15:9
8
00h
N/A
Reserved - Do Not Change
Output PGA Volume Update
LOPGA
Volume
OPVU[2]
Writing a 1 to this bit will update LOPGA, ROPGA, LOUTVOL
and ROUTVOL volumes simultaneously.
7
LOPGAZC
0b
LOPGA Zero Cross Enable
0 = Zero cross disabled
1 = Zero cross enabled
6:0
LOPGAVOL
[6:0]
79h
LOPGA Volume
(0dB)
00h
(See Table 28 for output PGA volume control range)
Reserved - Do Not Change
Output PGA Volume Update
R33 (21h)
15:9
8
ROPGA
Volume
OPVU[3]
N/A
Writing a 1 to this bit will update LOPGA, ROPGA, LOUTVOL
and ROUTVOL volumes simultaneously.
7
ROPGAZC
0b
ROPGA Zero Cross Enable
0 = Zero cross disabled
1 = Zero cross enabled
ROPGA Volume
6:0
ROPGAVOL
[6:0]
79h
(0dB)
0000h
11b
(See Table 28 for output PGA volume control range)
Reserved - Do Not Change
Speaker Output Attenuation (SPKN and SPKP)
00 = 0dB
R34 (22h)
15:2
1:0
Speaker
Volume
SPKATTN
[1:0]
01 = -6dB
10 = -12dB
11 = mute
R35 (23h)
15:9
8
00h
0b
Reserved - Do Not Change
Speaker Class D Mode Enable
0 = Class D mode
Class D (1)
CDMODE
1 = Class AB mode
7:0
00000011
b
Reserved - Do Not Change
R36 (24h)
Class D (2)
R37 (25h)
Class D (3)
15:0
0055h
Reserved - Do Not Change
Reserved - Do Not Change
15:6
5:3
00000001
00b
DCGAIN
[2:0]
000b
DC Speaker Boost
000 = 1.00x boost (+0dB)
001 = 1.27x boost (+2.1dB)
010 = 1.40x boost (+2.9dB)
011 = 1.52x boost (+3.6dB)
100 = 1.67x boost (+4.5dB)
101 = 1.8x boost (+5.1dB)
110 to 111 = Reserved
PP, May 2008, Rev 3.1
139
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
