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WM8753LEB/V Fiches technique(PDF) 49 Page - Wolfson Microelectronics plc

No de pièce WM8753LEB/V
Description  HI FI AND TELEPHONY DUAL CODEC
PDF  87 Pages
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Fabricant  WOLFSON [Wolfson Microelectronics plc]
Site Internet  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8753LEB/V Fiches technique(HTML) 49 Page - Wolfson Microelectronics plc

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WM8753L
Advanced Information
w
AI Rev 3.1 June 2004
49
Write R27/R28 to
configure GPIO
INT pin
Set HPSWIEN in
register R26
Set HPSWIPOL in
register R25
WM8753 will
interrupt when
headphones
connected
INT virtual pin
activated
user connects headphones or
headphones already connected
Host enters
interrupt mode
Read device
status [SR4]
(optional)
Clear HPSWIEN
Invert HPSWIPOL
Set HPSWIEN
INT pin
deactivated if no
other interrupts
HOST
WM8753
Will now interrupt
when headphones
disconnected
Read interrupt
status [SR5]
(when multiple
source enabled)
SR_IHPDET will be set if
interrupt caused by
headphones.
SR_HPDET will indicate
the current status of the
headphones.
The interupt controller in the WM8753 is level
sensitive, ensuring that interupts are always
detected even without a clock.
This flowchart illustrates headphone detection,
but the same principle applies to the other
interrupt sources.
user disconnects headphones or
headphones already disconnected
Figure 14 Interrupt Control Flowchart



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