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參數(shù)資料
| 型號： | 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)： | 74/78頁 |
| 文件大?。?/td> | 689K |
| 代理商： | WM9712LEFL |
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WM9712L
BTL LOUDSPEAKER OUTPUT
Production Data
w
PD Rev 4.0 December 2003
74
LOUT2 and ROUT2 can differentially drive a mono 8
loudspeaker as shown below.
LOUT2
ROUT2
WM9712L
INV = 1
Stereo: V
SPKR
= R-(-L) = L+R
Mono: V
SPKR
= M-(-M) = 2M
ROUT2VOL
LOUT2VOL
-1
Figure 27 Speaker Output Connection (INV = 1)
The right channel is inverted by setting the INV bit, so that the signal across the loudspeaker is the
sum of left and right channels.
COMBINED HEADSET / BTL EAR SPEAKER
In smartphone applications with a loudspeaker and separate ear speaker (receiver), a BTL ear
speaker can be connected at the OUT3 pin, as shown below.
HPOUTL
HPOUTR
HPGND = 0V
WM9712L
OUT3
BTL ear
speaker
Figure 28 Combined Headset / BTL Ear Speaker (OUT3SRC = 00)
The ear speaker and the headset play the same signal. Whenever the headset is plugged in, the
headphone outputs are enabled and OUT3 disabled. When the headset is not plugged in, OUT3 is
enabled (see “Jack Insertion and Auto-Switching”)
COMBINED HEADSET / SINGLE-ENDED EAR SPEAKER
Instead of a BTL ear speaker, a single-ended ear speaker can also be used, as shown below.
HPOUTL
HPOUTR
HPGND = 0V
WM9712L
OUT3
ear speaker
(single-ended)
Figure 29 Combined Headset / Single-ended Ear Speaker (OUT3SRC = 01)
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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