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WM8959 Datasheet(PDF) 123 Page - Wolfson Microelectronics plc

Part # WM8959
Description  Mobile Multimedia DAC with Dual-Mode Class AB/D Speaker Driver
PDF  155 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8959 Datasheet(HTML) 123 Page - Wolfson Microelectronics plc

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Pre-Production
WM8959
w
PP, May 2008, Rev 3.1
123
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.
STEP
DESCRIPTION
REGISTER SETTING
1
Enable soft start control and
start-up bias source. Select
start-up bias.
SOFTST = 1
BUFCOPEN = 1
POBCTRL = 1
2
Disable VMID
VMID_MODE = 00
3
Time delay for soft-shutdown to
execute
4
Disable Output drivers.
LOUT_ENA = 0
ROUT_ENA = 0
5
Discharge output drivers.
DIS_LOUT = 1
DIS_ROUT = 1
6
Select default bias source.
POBCTRL = 0
7
Disable soft start control and
soft start voltage.
SOFTST = 0
BUFCOPEN = 0
Table 81 Example Shut-down and Discharge Control Sequence



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