WM9713 datasheet(105/111 Pages) WOLFSON

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Giải thích chi tiết về linh kiện	AC 97 AUDIO TOUCHPANEL CODEC

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Preliminary Technical Data

WM9713L

PTD, March 2004, Rev 2.2

105

COMBINED HEADSET / SINGLE-ENDED EAR SPEAKER

Instead of a BTL ear speaker, a single-ended ear speaker can also be used, as shown below.

Figure 39 Combined Headset / Single-ended Ear Speaker

JACK INSERT DETECTION

The circuit diagram below shows how to detect when a headphone or headset has been plugged into

the headphone socket. It generates an interrupt, instructing the controller to enable HPL and HPR

and disable OUT3.

Figure 40 Jack Insert Detection Circuit

The circuit requires a headphone socket with a switch that closes on insertion. It detects both

headphones and phone headsets. Any GPIO pin can be used, provided that it is configured as an

input.

HOOKSWITCH DETECTION

Alternatively a headphone socket with a switch that opens on insertion can be used. For this mode

of operation the GPIO input must be inverted.

The circuit diagram below shows how to detect when the “hookswitch” of a phone headset is pressed

(pressing the hookswitch is equivalent to lifting the receiver in a stationary telephone).

WM9713 bảng dữ liệu(PDF) 105 Page - Wolfson Microelectronics plc