- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄361881 > WM9712LEFL (Wolfson Microelectronics) AC97 Audio and Touchpanel CODEC PDF資料下載
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)： | 17/78頁 |
| 文件大小： | 689K |
| 代理商： | WM9712LEFL |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁當(dāng)前第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁
Production Data
WM9712L
w
PD Rev 4.0 December 2003
17
AGND
MICBIAS
= 1.8 x CAP2
= 0.9 X AVDD
CAP2
WM9712L
Figure 2 Microphone Bias Schematic
PHONE INPUT
Pin 20 (PHONE) is a mono, line level input designed to connect to the receive path of a telephony
device.
The pin connects directly to the record selector for phone call recording (Note: to record both sides of
a phone call, one ADC channel should record the PHONE signal while the other channel records the
MIC signal). The RECVOL PGA adjusts the recording volume, controlled by register 1Ch or by the
ALC function.
To listen to the PHONE signal, the signal passes through a separate PGA, controlled by register
0Ch. The signal can be routed into the headphone mixer (for normal phone call operation) and/or the
speaker mixer (for speakerphone operation), but not into the phone mixer (to prevent forming a
feedback loop). When the phone input is not used, the phone-in PGA can be switched off to save
power (see “Power Management” section).
PHONE is biased internally to the reference voltage VREF. Whenever the input is muted or the
device placed into standby mode, the input remains biased to VREF using special anti-thump
circuitry to suppress any audible clicks when changing inputs.
REGISTER
ADDRESS
0Ch
Phone Input
BIT
LABEL
DEFAULT
DESCRIPTION
15
P2H
1
Mute PHONE path to headphone mixer
1: Mute, 0: No mute (ON)
Mute PHONE path to speaker mixer
1: Mute, 0: No mute (ON)
PHONE input gain
00000: +12dB
… (1.5dB steps)
11111: -34.5dB
14
P2S
1
4:0
PHONE
VOL
01000
(0dB)
Table 4 Phone Input Control
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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。