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參數(shù)資料
| 型號： | WM9712L |
| 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)： | 29/78頁 |
| 文件大小： | 689K |
| 代理商： | WM9712L |
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Production Data
WM9712L
w
PD Rev 4.0 December 2003
29
ANALOGUE AUDIO OUTPUTS
The following sections give an overview of the analogue audio output pins. For more information on
recommended external components, please refer to the “Applications Information” section.
HEADPHONE OUTPUTS – HPOUTL AND HPOUTR
The HPOUTL and HPOUTR (pins 39 and 41) are designed to drive a 16
or 32
headphone or a
line output. They can also be used as line-out pins. The output signal is produced by the headphone
mixer.
The signal volume on HPOUTL and HPOUTR can be independently adjusted under software control
by writing to register 04h. When HPOUTL and HPOUTR are not used, the output drivers can be
disabled to save power (see “Power Management” section). Both pins remain at the same DC level
(the reference voltage VREF) when they are disabled, so that no click noise is produced.
REGISTER
ADDRESS
04h
HPOUTL /
HPOUTR
Volume
BIT
LABEL
DEFAULT
DESCRIPTION
15
MUTE
1
Mute HPOUTL and HPOUTR
1: Mute (OFF)
0: No Mute (ON)
HPOUTL Volume
000000: 0dB (maximum)
000001: -1.5dB
… (1.5dB steps)
011111: -46.5dB
1xxxxx: -46.5dB
Zero Cross Enable
0: Change gain immediately
1: Change gain only on zero crossings,
or after time-out
HPOUTR Volume
Similar to HPOUTLVOL
13:8
HPOUTLVOL
000000
(0dB)
7
ZC
0
5:0
HPOUTRVOL
00000
(0dB)
Table 15 HPOUTL / HPOUTR Control
相關PDF資料 |
PDF描述 |
|---|---|
| WM9712LEFL | AC97 Audio and Touchpanel CODEC |
| WM9712LEFT | AC97 Audio and Touchpanel CODEC |
| WM9712LEFV | AC97 Audio and Touchpanel CODEC |
| WM9712LSEFL | AC97 Audio and Touchpanel CODEC |
| WM9712LSEFT | AC97 Audio and Touchpanel CODEC |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| WM9712L_11 | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:ACa??97 Audio and Touchpanel CODEC |
| WM9712LEFL | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:AC97 Audio and Touchpanel CODEC |
| 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 |
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