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參數(shù)資料
| 型號： | LM4931 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Audio Subsystem with Mono High Efficiency Loudspeaker and Stereo Headphone Amplifiers |
| 中文描述： | 與單聲道音頻子系統(tǒng)高效揚聲器和立體聲耳機放大器 |
| 文件頁數(shù)： | 17/47頁 |
| 文件大小： | 1640K |
| 代理商： | LM4931 |
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Headphone Gain Registers
This register is used to control the gain of the headphone amplifier.
DEFAULT CHART FOR HP_GAIN (03h)
DATA BIT
DEFAULT
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
0
HP_GAIN (03h) (SET = LOGIC 1, CLEAR = LOGIC 0)
Address
4:0
Register
HP_GAIN
Description
Programs the gain of the headphone amplifier. Gain is set as follows:
4:0
Headphone Gain
00000
–46.5dB
00001
–45dB
00010
–43.5dB
00011
–42dB
00100
–40.5dB
00101
–39dB
00110
–37.5dB
00111
–36dB
01000
–34.5dB
01001
–33dB
01010
–31.5dB
01011
–30dB
01100
–28.5dB
01101
–27dB
01110
–25.5dB
01111
–23dB
If set the headphone amplifier is muted.
Defines if a high or low voltage at the HP_SENSE pin should indicate that a
headphone is plugged in.
HP_SENSE_TYPE
0
1
The HP_SENSE_OUTPUT signal can be configured to appear on the GPIO pin.
HP_SENSE_OUTPUT If set, the polarity of the HP_CONNECTED output from the GPIO pin is reversed, so if
the headphone is connected a 0 is reported on the GPIO rather than a 1. This does not
alter the operation of the loudspeaker auto-muting function (as defined in Loudspeaker
Gain Register)
4:0
10000
10001
10010
10011
10100
10101
10110
10111
11000
11001
11010
11011
11100
11101
11110
11111
Headphone Gain
–22.5dB
–21dB
–19.5dB
–18dB
–16.5dB
–15dB
–13.5dB
–12dB
–10.5dB
–9dB
–7.5dB
–6dB
–4.5dB
–3dB
–1.5dB
0dB
5
HP_MUTE
6
HP_SENSE_TYPE
HP_SENSE_IN
High = HP Plugged In
Low = HP Plugged In
7
L
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4931_06 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Audio Subsystem with Mono High Efficiency Loudsperker and Stereo Headphone Amplifiers |
| LM4931ITL/NOPB | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4931ITLBD | 功能描述:BOARD EVALUATION LM4931ITL RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 音頻放大器 系列:Boomer® 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- |
| LM49321 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Audio Sub-System with Stereo DAC, Mono Class AB Loudspeaker Amplifier, OCL/SE Stereo Headphone Output and RF Suppression |
| LM49321RL | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Audio Sub-System with Stereo DAC, Mono Class AB Loudspeaker Amplifier, OCL/SE Stereo Headphone Output and RF Suppression |
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