WM8994 Datasheet, PDF (53/359 Pages) Wolfson Microelectronics plc – Multi-Channel Audio Hub CODEC for Smartphones

Production Data
WM8994
REGISTER BIT
ADDRESS
LABEL
DEFAULT
DESCRIPTION
R21
(0015h)
7 IN1LP_MIXINL_BOOST
0
IN1LP Pin (PGA Bypass) to
MIXINL Gain Boost.
Input Mixer
(1)
This bit selects the maximum gain
setting of the IN1LP_MIXINL_VOL
register.
0 = Maximum gain is +6dB
1 = Maximum gain is +15dB
R41
(0029h)
Input Mixer
(3)
8 IN2L_TO_MIXINL
7 IN2L_MIXINL_VOL
0
IN2L PGA Output to MIXINL Mute
0 = Mute
1 = Un-Mute
0
IN2L PGA Output to MIXINL Gain
0 = 0dB
1 = +30dB
5 IN1L_TO_MIXINL
0
IN1L PGA Output to MIXINL Mute
0 = Mute
1 = Un-Mute
4 IN1L_MIXINL_VOL
0
IN1L PGA Output to MIXINL Gain
0 = 0dB
1 = +30dB
2:0 MIXOUTL_MIXINL_VOL
[2:0]
000
(Mute)
Record Path MIXOUTL to MIXINL
Gain and Mute
000 = Mute
001 = -12dB
010 = -9dB
011 = -6dB
100 = -3dB
101 = 0dB
110 = +3dB
111 = +6dB
R43
(002Bh)
Input Mixer
(5)
8:6 IN1LP_MIXINL_VOL
[2:0]
000
(Mute)
IN1LP Pin (PGA Bypass) to
MIXINL Gain and Mute
000 = Mute
001 = -12dB
010 = -9dB
011 = -6dB
100 = -3dB
101 = 0dB
110 = +3dB
111 = +6dB (see note below).
When IN1LP_MIXINL_BOOST is
set, then the maximum gain
setting is increased to +15dB, ie.
111 = +15dB.
Note that VMID_BUF_ENA must
be set when using the IN1LP (PGA
Bypass) input to MIXINL.
w
PD, April 2012, Rev 4.4
53