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參數(shù)資料
| 型號： | LM4550VH |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 消費家電 |
| 英文描述： | AC ’97 Rev 2.1 Multi-Channel Audio Codec with Stereo Headphone Amplifier, Sample Rate Conversion and National 3D Sound |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| 封裝： | 7 X 7 X 1.40 MM, LQFP-48 |
| 文件頁數(shù)： | 23/25頁 |
| 文件大?。?/td> | 507K |
| 代理商： | LM4550VH |
Secondary Codec Register Access Definitions
(Continued)
Reg 28h & Multiple Codec Option:
Reg
28h
Name
Extended
Audio ID
D15 D14
ID1
D13
x
D12
x
D11
x
D10
x AMAP
D9
D8
D7
D6
D5
x
D4
x
D3
D2
x
D1
D0
VRA
Default
xxxxh
ID0
The AMAP bit, D9 in the Extended Audio ID Register (registers 28h), indicates whether or not the audio Codec supports Optional
AC’97 2.1 compliantAC-link slot to audio DAC mappings.AMAP = 1 in D9 indicates that the default (following cold or warm reset)
Codec slot to DAC mappings (configured via hardwirings, strap pin(s), or other methods) comform to the table below.
Codec Mode
Pin 46 (ID1)
Pin 45 (ID0)
Reg 28h ID1
Reg 28h ID0
PCM Left DAC
uses data from
slot #
PCM Right DAC
uses data from
slot #
4
4
8
9
Primary
Secondary 1
Secondary 2
Secondary 3
NC/DV
DD
NC/DV
DD
GND
GND
NC/DV
DD
GND
NC/DV
DD
GND
0
0
1
1
0
1
0
1
3
3
7
6
CHAIN_IN
Using National Semiconductor’s unique feature for chaining together codecs, a multiple codec system can be built. This chain
feature requires only a single stream back to the controller. By setting the two LSBs of register 74h to something other than the
codec ID, the codec stops sending its own SDATA_IN signal and instead passes the signal connected here out the SDATA_IN
pin. When the CHAIN_IN feature is used, another codec’s SDATA_IN pin should be connected here, or else this pin should be
grounded to prevent the possibility of floating the SDATA_IN signal at the controller. Reg 74h is updated at the rising edge of
SYNC.
L
www.national.com
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相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM4550 | AC ’97 Rev 2.1 Multi-Channel Audio Codec with Stereo Headphone Amplifier, Sample Rate Conversion and National 3D Sound |
| LM4809LD | Dual 105mW Headphone Amplifier with Active-Low Shutdown Mode |
| LM4809 | Dual 105mW Headphone Amplifier with Active-Low Shutdown Mode |
| LM4809MA | Dual 105mW Headphone Amplifier with Active-Low Shutdown Mode |
| LM4809MM | Dual 105mW Headphone Amplifier with Active-Low Shutdown Mode |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4550VH WAF | 制造商:Texas Instruments 功能描述: |
| LM4550VH/NOPB | 功能描述:IC AC '97 CODEC 48-LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 編解碼器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:立體聲音頻 數(shù)據(jù)接口:串行 分辨率（位）:18 b ADC / DAC 數(shù)量:2 / 2 三角積分調(diào)變:是 S/N 比，標(biāo)準(zhǔn) ADC / DAC (db):81.5 / 88 動態(tài)范圍，標(biāo)準(zhǔn) ADC / DAC (db):82 / 87.5 電壓 - 電源，模擬:2.6 V ~ 3.3 V 電壓 - 電源，數(shù)字:1.7 V ~ 3.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-TQFN-EP（7x7） 包裝:帶卷 (TR) |
| LM4550VHX | 制造商:Rochester Electronics LLC 功能描述:AC '97 REV 2.1 CODEC - Bulk |
| LM4550VHX/NOPB | 制造商:Texas Instruments 功能描述:Audio Codec 2ADC / 2DAC 18-Bit 48-Pin LQFP T/R |
| LM4558 | 制造商:HTC 制造商全稱:HTC Korea TAEJIN Technology Co. 功能描述:DUAL OPERATIONAL AMPLIFIERS |
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