WM8990ECS/RV Wolfson Microelectronics, WM8990ECS/RV Datasheet - Page 137

• Manufacturer Part Number: WM8990ECS/RV
• Description: Audio CODECs Stereo CODEC w.Class AB/D speaker driver
• Manufacturer: Wolfson Microelectronics

Specifications of WM8990ECS/RV

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

w
Production Data
Shut-down and discharge sequence
The following sequence describes the register settings required to mute, disable and discharge the
headphone outputs LOUT and ROUT. It assumes that the soft start control and voltage source is
already disabled.
Table 90 Example Shut-down and Discharge Control Sequence
6
7
1
2
3
4
5
STEP
Enable soft start control and
start-up bias source. Select
start-up bias.
Disable VMID
Time delay for soft-shutdown to
execute
Disable Output drivers.
Discharge output drivers.
Select default bias source.
Disable soft start control and
soft start voltage.
DESCRIPTION
SOFTST = 1
BUFDCOPEN = 1
POBCTRL = 1
VMID_MODE = 00
ROUT_ENA = 0
DIS_LOUT = 1
DIS_ROUT = 1
POBCTRL = 0
SOFTST = 0
BUFDCOPEN = 0
LOUT_ENA = 0
REGISTER SETTING
PD, March 2009, Rev 4.0
WM8990
137