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WM8952ECS/RV Datenblatt(PDF) 55 Page - Wolfson Microelectronics plc

Teilenummer WM8952ECS/RV
Bauteilbeschribung  Mono ADC with Microphone Pre-amplifier
PDF  72 Pages
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Hersteller  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8952ECS/RV Datenblatt(HTML) 55 Page - Wolfson Microelectronics plc

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Pre Production
WM8952
w
PP, Rev 3.1, June 2011
55
POP MINIMISATION
Register SOFT_START is the enable bit for the VMID soft-start function. Setting the bit to 1 causes
charging of the VMID decoupling cap to follow a soft-start profile which minimises pops. This soft-
start profile has minimal impact on VMID charge time.
Fast VMID discharge is enabled using TOGGLE. Setting to 1 opens a low impedance discharge path
from VMID to GND. This function can be used during power down to reduce the discharge time of
the VMID decoupling cap. Must be set to 0 for normal operation.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R7
Additional Control
5
SOFT_ST
ART
0
VMID Soft Start
0=disabled
1=enabled
4
TOGGLE
0
Fast VMID Discharge
0=normal
1=enable (used during power-down)
Table 46 POP Minimisation Control
THERMAL SHUTDOWN
To protect the WM8952 from overheating a thermal shutdown circuit is included. The thermal
shutdown can be configured to produce an interrupt when the device reaches approximately 125oC.
See General Purpose Input/Output section.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R49
Output control
1
TSDEN
1
Thermal Shutdown Enable
0 : thermal shutdown disabled
1 : thermal shutdown enabled
Table 47 Thermal Shutdown



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