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參數(shù)資料
| 型號(hào)： | WM9712LEFL |
| 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： | WM9712LEFL |
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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 |
|---|---|
| WM9712LEFT | AC97 Audio and Touchpanel CODEC |
| WM9712LEFV | AC97 Audio and Touchpanel CODEC |
| WM9712LSEFL | AC97 Audio and Touchpanel CODEC |
| WM9712LSEFT | AC97 Audio and Touchpanel CODEC |
| WM9712LSEFV | AC97 Audio and Touchpanel CODEC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| WM9712LEFL/RV | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:AC97 Audio and Touchpanel CODEC |
| WM9712LEFL/V | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:AC97 Audio and Touchpanel CODEC |
| WM9712LEFT | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:AC97 Audio and Touchpanel CODEC |
| 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 |
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