WM9090ECS/R Wolfson Microelectronics, WM9090ECS/R Datasheet - Page 22

• Manufacturer Part Number: WM9090ECS/R
• Description: Audio CODECs Audio Subsystem w/ capless headphones
• Manufacturer: Wolfson Microelectronics

Specifications of WM9090ECS/R

• Interface Type: 2-Wire, l2C
• Thd Plus Noise: 80 dB
• Ic Function: Ultra Low Power Audio Subsystem
• Brief Features: Mono Class D Speaker Driver, Automatic Gain Control (AGC)
• Supply Voltage Range: 2.7V To 5.5V
• Operating Temperature Range: -40°C To +85°C
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WM9090
w
HEADPHONE MIXER CONTROL
The Headphone Mixer configuration registers are described in Table 8 for the Left Channel
(MIXOUTL) and Table 9 for the Right Channel (MIXOUTR). A subset of the available input PGAs
IN1A, IN1B, IN2A and IN2B is selectable as an input to each of the Headphone Mixers, as illustrated
in Figure 4.
Care should be taken when enabling more than one path to a Headphone Mixer in order to avoid
clipping. The gain of each input path is adjustable using a selectable volume control in each path to
facilitate this.
The Headphone Mixer outputs can be muted or enabled using the MIXOUTL_MUTE and
MIXOUTR_MUTE register bits. The Headphone Mixer volume is also controlled by the Headphone
Output PGAs, as defined in Table 10.
Table 8 Left Output Mixer (MIXOUTL) Control
R45 (2Dh)
Output Mixer1
R47 (2Fh)
Output Mixer3
R46 (2Eh)
Output Mixer2
R48 (30h)
Output Mixer4
REGISTER
ADDRESS
REGISTER
ADDRESS
BIT
7:6
3:2
BIT
6
2
8
6
4
2
0
8
IN1A_TO_MIXOUTL
IN2A_TO_MIXOUTL
MIXOUTL_MUTE
IN1A_MIXOUTL_VOL
[1:0]
IN2A_MIXOUTL_VOL
[1:0]
IN1A_TO_MIXOUTR
IN1B_TO_MIXOUTR
IN2A_TO_MIXOUTR
IN2B_TO_MIXOUTR
MIXOUTR_MUTE
LABEL
LABEL
DEFAULT
DEFAULT
00
00
0
0
1
0
0
0
0
1
IN1A to MIXOUTL enable
0 = Disabled
1 = Enabled
IN2A to MIXOUTL enable
0 = Disabled
1 = Enabled
MIXOUTL Output mute
0 = Un-Mute
1 = Mute
IN1A to MIXOUTL volume control
00 = 0dB
01 = -6dB
10 = -9dB
11 = -12dB
IN2A to MIXOUTL volume control
00 = 0dB
01 = -6dB
10 = -9dB
11 = -12dB
IN1A to MIXOUTR enable
0 = Disabled
1 = Enabled
IN1B to MIXOUTR enable
0 = Disabled
1 = Enabled
IN2A to MIXOUTR enable
0 = Disabled
1 = Enabled
IN2B to MIXOUTR enable
0 = Disabled
1 = Enabled
MIXOUTR Output mute
0 = Un-Mute
1 = Mute
PP, January 2010, Rev 3.0
DESCRIPTION
DESCRIPTION
Pre-Production
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