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參數(shù)資料
| 型號： | WM9712LEFV |
| 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)： | 33/78頁 |
| 文件大小： | 689K |
| 代理商： | WM9712LEFV |
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Production Data
WM9712L
w
PD Rev 4.0 December 2003
33
JACK INSERTION AND AUTO-SWITCHING
In a phone application, a BTL ear speaker may be connected across OUT3 and HPOUTL, and a
stereo headphone on HPOUTL and HPOUTR. Typically, only one of these two output devices is
used at any given time: when no headphone is plugged in, the BTL ear speaker is active, otherwise
the headphone is used.
The presence of a headphone can be detected using GPIO1 (pin 44) and an external pull-up resistor
(see “Applications Information” section for a circuit diagram). When the jack is inserted GPIO1 is
pulled low by a switch on the socket. When the jack is removed GPIO1 is pulled high by a resistor. If
the JIEN bit is set, the WM9712L automatically switches between headphone and ear speaker, as
shown below.
REGISTER
ADDRESS
58h
Additional
Functional
Control
BIT
LABEL
DEFAULT
DESCRIPTION
12
11
JIEN
0
Jack Insert Enable – Takes output of GPIO1
logic
FRC
0
Force Ear Speaker Mode
See table below
Table 20 Jack Insertion / Auto-Switching (1)
JIEN FRC GPIO1
MODE DESCRIPTION
O
S
H
V
H
V
O
V
H
H
S
0
0
X
Jack insert detection disabled
(headphone and ear speaker
can be used at the same
time)
Set by
reg.
24h
and
26h
D
Set by
reg.
24h
and
26h
1
0
0
Jack insert detection
enabled, headphone plugged
in
S
1
X
1
Jack insert detection
enabled, headphone not
plugged in
Force Ear Speaker Mode
0
1
X
Set by
reg.
16h
S
S
S
1
1
X
Invalid; do not use this setting
Table 21 Jack Insertion / Auto-Switching (2)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 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 |
| WME128K8 | 128Kx8 CMOS Monolithic EEPROM(128Kx8 CMOS單片EEPROM) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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(zhuǎn)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(fēng)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(zhuǎn)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(fēng)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 |
| WM9712LSEFL/RV | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:AC97 Audio and Touchpanel CODEC |
| WM9712LSEFL/V | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:AC97 Audio and Touchpanel CODEC |
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