WM9090ECS/R Wolfson Microelectronics, WM9090ECS/R Datasheet - Page 42

• 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
Table 25 Headphone Output Disable Sequence
The register bits relating to pop suppression control are defined in Table 26.
R1 (01h)
Power
Management
(1)
R96 (60h)
Analogue HP
0
Step 1
Step 2
REGISTER
ADDRESS
SEQUENCE
BIT
9
8
7
6
5
3
HPOUT1L_ENA
HPOUT1R_ENA
HPOUT1L_RMV_
SHORT
HPOUT1L_OUTP
HPOUT1L_DLY
HPOUT1R_RMV_
SHORT
HPOUT1L_RMV_SHORT = 0
HPOUT1L_DLY = 0
HPOUT1L_OUTP = 0
HPOUT1R_RMV_SHORT = 0
HPOUT1R_DLY = 0
HPOUT1R_OUTP = 0
HPOUT1L_ENA = 0
HPOUT1R_ENA = 0
LABEL
HEADPHONE DISABLE
DEFAULT
0
0
0
0
0
0
Headphone Output (HPOUTL) input
stage enable
0 = Disabled
1 = Enabled
For pop-free operation, this bit should
be set as the first stage of the
HPOUTL Enable sequence.
Headphone Output (HPOUTR) input
stage enable
0 = Disabled
1 = Enabled
For pop-free operation, this bit should
be set as the first stage of the
HPOUTR Enable sequence.
Removes HPOUT1L short
0 = HPOUT1L short enabled
1 = HPOUT1L short removed
For pop-free operation, this bit should
be set to 1 as the final step in the
HPOUTL Enable sequence.
Enables HPOUT1L 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 HPOUT1L 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.
Removes HPOUT1R short
0 = HPOUT1R short enabled
1 = HPOUT1R short removed
For pop-free operation, this bit should
be set to 1 as the final step in the
HPOUTR Enable sequence.
PP, January 2010, Rev 3.0
DESCRIPTION
Pre-Production
42