參數(shù)資料
型號(hào)： LM4930
廠商： National Semiconductor Corporation
英文描述： Audio Subsystem with Stereo Headphone & Mono Speaker Amplifiers
中文描述： 音頻子系統(tǒng)的立體聲耳機(jī)
文件頁數(shù)： 4/33頁
文件大?。?/td> 966K
代理商： LM4930
Pin Descriptions
(Continued)
Loudspeaker amplifier BTL positive out (+)
Analog V
DD
for loudspeaker amplifier
Digital ground
Digital V
DD
12.288MHz or 24.576MHz Master Clock from crystal (via XTAL OUT) or external source
F2
F3
F4
F5
F6
LS+
AVDD_LS
DGND_X
DVDD_X
MCLK/XTAL_IN
SYSTEM CONTROL REGISTERS
The LM4930 is controlled with a two-wire serial interface. This interface is used to configure the operating mode, digital interfaces,
and delta-sigma modulators. The LM4930 is controlled by writing information into a series of write-only registers, each with its own
unique 7 bit address. The following registers are programmable:
Basic Config Register
This register is used to configure the I
2
S and PCM interfaces as well as the 48kHz DAC module. The 7 bit address for the
BASICCONFIG register is XX10000.
(X = 0 if ADDR is set to logic 0)
BASIC CONFIGURATION (XX1000).
(Set = logic 1, Clear = logic 0)
(X = 1 if ADDR is set to logic 1)
BIT
RESET
15
0
14
0
13
0
12
0
11
0
10
0
9
0
8
0
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
0
Address
3:0
Register
MODE
Description
The LM4930 can be placed in one of several modes that dictate the basic operation. When a
new mode is selected the LM4930 will change operation silently and will reconfigure the
power management profile automatically. The modes are described as follows: (Note 14)
Mode
Mono Speaker
Amplifier Source
Source
0000
None
None
0001
None
None
0010
Voice
None
Headphone Left
Headphone Right
Source
None
None
None
Comment
Powerdown mode
Standby Mode
Mono speaker
mode
Headphone call
mode
Conference call
mode
L+R mixed to
mono speaker
Headphone
stereo audio
L+R mixed to
mono speaker +
stereo headphone
audio
Mixed Mode
Mixed mode
0011
None
Voice
Voice
0100
Voice
Voice
Voice
0101
Audio (L+R)
None
None
0110
None
Audio (Left)
Audio (Right)
0111
Audio (L+R)
Audio (Left)
Audio (Right)
1000
1001
Audio (Left)
Voice + Audio
(Left)
Voice
Voice
Voice
Voice
Voice
1010
Resets the LM4930, excluding the control registers
If set the PCM interface uses a long frame sync. (Note 12)
If set the 8 MSBs are presumed to be companded data and the 8 LSBs are ignored. (Note
12)
If set, the companded G711 data is set to be A-law, else m-law is assumed (Note 12)
Sets 1 (00h), 2 (01h) or 4(10h) 16 bit frames per sync. The PCM_SDO pin is tri-stated during
the latter frames. (Note 12)
Audio (Left)
Audio (Left)
Mixed Mode
4
5
6
SOFT_RESET
PCM_LONG
PCM_COMPANDED
7
8:9
PCM_LAW
PCM_SYNC_MODE
L
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM4930_04 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Audio Subsystem with Stereo Headphone & Mono Speaker Amplifiers
LM4930ITL 制造商:Texas Instruments 功能描述:Audio Amp Headphone/Microphone/Speaker 1-CH Mono/2-CH Stereo 1W Class-AB 36-Pin uSMD T/R
LM4930ITL/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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
LM4930ITLX 制造商:Texas Instruments 功能描述:Audio Amp Headphone/Microphone/Speaker 1-CH Mono/2-CH Stereo 1W Class-AB 36-Pin uSMD T/R
LM4930ITLX/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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
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