參數(shù)資料
型號： WM9712LEFT
廠商： Wolfson Microelectronics
元件分類： Codec
英文描述： AC97 Audio and Touchpanel CODEC
中文描述： AC97音頻編解碼器和觸摸屏
文件頁數(shù)： 75/78頁
文件大小： 689K
代理商： WM9712LEFT
Production Data
WM9712L
w
PD Rev 4.0 December 2003
75
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 HPOUTL and
HPOUTR and disable OUT3.
L
R
switch closes
on insertion
+
-
+
-
HPOUTL
HPOUTR
GPIO
interrupt
logic
100k
DBVDD
Figure 30 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
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).
GPIO
interrupt
logic
MIC
L
R
HOOK
SWITCH
47
+
-
+
-
HPOUTL
AGND
HPOUTR
MICL/MICR
680
2.2k
MICBIAS
PHONE HEADSET
WM9712L
Figure 31 Hookswitch Detection Circuit
The circuit uses a GPIO pin as a sense input. The impedance of the microphone and the resistor in
the MICBIAS path must be such that the potential at the GPIO pin is above 0.7
×
DBVDD when the
hookswitch is open, and below 0.3
×
DBVDD when it is closed.
相關PDF資料
PDF描述
WM9712LEFV AC97 Audio and Touchpanel CODEC
WM9712LSEFL AC97 Audio and Touchpanel CODEC
WM9712LSEFT AC97 Audio and Touchpanel CODEC
WM9712LSEFV AC97 Audio and Touchpanel CODEC
WME128K8-XXX 128Kx8 CMOS MONOLITHIC EEPROM, SMD 5962-96796
相關代理商/技術參數(shù)
參數(shù)描述
WM9712LEFT/RV 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:AC97 Audio and Touchpanel CODEC
WM9712LEFV 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:AC97 Audio and Touchpanel CODEC
WM9712LGEFL/RV 功能描述:接口—CODEC STR AC’97 CODEC TP 48-pin TQFP RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
WM9712LGEFL/V 功能描述:接口—CODEC Stereo AC’97 CODEC T/P Interface RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
WM9712LSEFL 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:AC97 Audio and Touchpanel CODEC
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