wm8400 Wolfson Microelectronics plc, wm8400 Datasheet - Page 66

• Manufacturer Part Number: wm8400
• Description: Wolfson Audioplustm Hi-fi Audio Codec And Power Management Unit For Mobile Multimedia
• Manufacturer: Wolfson Microelectronics plc

WM8400
w
In Rx Voice Mode (AINLMODE=01, AINRMODE=01), adjustable gain control is available for the
RXVOICE output by use of the LR4BVOL[2:0] and LL4BVOL[2:0] register fields on the left channel
and by RL4BVOL[2:0] and RR4BVOL[2:0] on the right channel. Both Volume fields for the desired
channel(s) must be set to the same value for true Differential input characteristics. This configuration
is illustrated in Figure 29. The applicable register settings are shown in Table 28.
Table 28 RxVoice Mode Register Settings
Figure 29 RxVoice Mode Signal Paths
RIN3/GPI8
RIN4/RXP
LIN3/GPI7
LIN4/RXN
Left Channel Rx Voice
Mode
(RXVOICE to AINLMUX)
Right Channel Rx Voice
Mode
(RXVOICE to AINRMUX)
CONFIGURATION
RIN1
RIN2
LIN2
LIN1
-
+
-
+
-
+
-
+
RIN12
LIN12
LIN34
1. Select Rx Voice Mode
2. Enable Rx Voice input as required
Important: These two register fields
must be set to the same value. See
Table 30 for full definitions of these
fields.
1. Select Rx Voice Mode
2. Enable Rx Voice input as required
Important: These two register fields
must be set to the same value. See
Table 31 for full definitions of these
fields.
RIN34
en
-
+
+
-
RXVOICE
RXVOICE
DIFFINR
DIFFINL
+
-
+
-
REGISTER SETTINGS
INMIXR
Record R
INMIXL
Record L
+
+
en
AINRMUX
AINLMUX
AINLMODE = 01
LL4BVOL
LR4BVOL
AINRMODE = 01
RL4BVOL
RR4BVOL
PP, April 2009, Rev 3.0
ADC
ADC
en
en
Pre-Production
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