wm8941 Wolfson Microelectronics plc, wm8941 Datasheet - Page 50

• Manufacturer Part Number: wm8941
• Description: Mono Codec With Speaker Driver And Video Buffer
• Manufacturer: Wolfson Microelectronics plc

WM8941
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Table 41 Output Switch Operation (GPIOSEL=001)
THERMAL SHUTDOWN
Table 42 Thermal Shutdown
SPEAKER OUTPUT
Figure 22 Speaker Output Connection
The speaker outputs can drive very large currents. To protect the WM8941 from overheating a
thermal shutdown circuit is included. The thermal shutdown can be configured to produce an interrupt
when the device reaches approximately 125
SPKOUTP/N can differentially drive a mono 8Ω Bridge Tied Load (BTL) speaker as shown below.
0
0
0
0
1
1
1
1
R49
Output control
GPIOPOL
REGISTER
ADDRESS
0
0
1
1
0
0
1
1
CSB/GPIO
1
BIT
TSDEN
LABEL
0
1
X
X
X
X
0
1
SPKNEN/
SPKPEN
1
o
C. See General Purpose Input/Output section.
DEFAULT
X
X
0
1
0
1
X
X
MONOEN
Thermal Shutdown Enable
0 : thermal shutdown disabled
1 : thermal shutdown enabled
No
Yes
No
No
No
No
No
Yes
SPEAKER
ENABLED
DESCRIPTION
PD, Rev 4.0, August 2008
No
No
No
Yes
No
Yes
No
No
ENABLED
OUTPUT
MONO
Production Data
50