WM8753LEBSLASHV datasheet(49/87 Pages) WOLFSON

49 / 87 page

WM8753L

Advanced Information

AI Rev 3.1 June 2004

Write R27/R28 to

configure GPIO

INT pin

Set HPSWIEN in

Set HPSWIPOL in

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

WM8753LEB/V 数据表(PDF) 49 Page - Wolfson Microelectronics plc

WM8753LEB/V 数据表(HTML) 49 Page - Wolfson Microelectronics plc

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