WM9090ECS/R Wolfson Microelectronics, WM9090ECS/R Datasheet - Page 45

• 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

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Production Data
Table 26 Pop Suppression Control
RECOMMENDED HEADPHONE START UP SEQUENCE
Below is a recommended headphone start up sequence for suppressing pops.
Firstly program the following sequence into the Control Write Sequencer. For further details refer to
the ‘Programming a Sequence’ section.
WSEQ
INDEX
(0Ch)
(0Ah)
(0Bh)
(00h)
(01h)
(02h)
(03h)
(04h)
(05h)
(06h)
(07h)
(08h)
REGISTER
ADDRESS
10
11
0
1
2
3
4
5
6
7
8
9
REGISTER
R96 (60h)
ADDRESS
R76 (4Ch)
R3 (03h)
R46 (2Dh)
R47 (2Eh)
R48 (2Fh)
R49 (30h)
R28 (1Ch)
R29 (1Dh)
R1 (01h)
R84 (54h)
R96 (60h)
BIT
2
1
WIDTH
1 bits
2 bits
1 bits
1 bits
1 bits
1 bits
1 bits
1 bits
2 bits
6 bits
6 bits
8 bits
HPOUT1R_OUTP
HPOUT1R_DLY
LABEL
START
Bit 15
Bit 4
Bit 6
Bit 4
Bit 8
Bit 8
Bit 8
Bit 8
Bit 8
Bit 0
Bit 0
Bit 0
DATA
EEh
01h
03h
01h
01h
00h
00h
01h
01h
03h
22h
33h
DEFAULT
0
0
(32.5ms)
DELAY
0h
0h
0h
0h
0h
0h
0h
0h
0h
0h
9h
0h
Enables HPOUT1R output stage
0 = Disabled
1 = Enabled
For pop-free operation, this bit should
be set to 1 after the DC offset
cancellation has been performed.
Enables HPOUT1R intermediate
stage
0 = Disabled
1 = Enabled
For pop-free operation, this bit should
be set to 1 after the output signal path
has been configured, and before the
DC Offset cancellation is scheduled
This bit should be set with at least
20us delay after HPOUT1L_ENA.
EOS
0b
0b
0b
0b
0b
0b
0b
0b
0b
1b
0b
0b
PD, November 2010, Rev 4.1
DESCRIPTION
Enable Charge Pump
Enable Output Mixers
Enable path from IN1A
TO MIXOUTL
Enable path from IN1B
TO MIXOUTR
Un-mute MIXOUTL
Un-mute MIXOUTR
HPOUT1L_VOL=-12dB
and update
HPOUT1R_VOL=-12dB
and update
Enable HPOUTL/R
Enable HP DLY
Enable DC Servo and
Start Calibration
Enable Headphone
Output
DESCRIPTION
WM9090
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