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參數(shù)資料
| 型號： | LM4550BVHX/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | LM4550B AC '97 Rev 2.1 Multi-Channel Audio Codec with Stereo Headphone Amplifier, Sample Rate Conversion and National 3D Sound; Package: LQFP; No of Pins: 48; Qty per Container: 1000/Reel |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| 封裝： | 7 X 7 MM, 1.40 MM HEIGHT, LQFP-48 |
| 文件頁數(shù)： | 21/31頁 |
| 文件大小： | 998K |
| 代理商： | LM4550BVHX/NOPB |
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Multiple Codecs (Continued)
The Codec Identity is determined by the inverting input pins
ID1#, ID0# (pins 46 and 45) and can be read as the value of
the ID1, ID0 bits (D15, D14) in the Extended Audio ID
register, 28h of the target codec.
In addition to the Codec Identity bits (ID1, ID0), the read-only
Extended Audio ID register (28h) contains the AMAP bit
(D9). The AMAP bit indicates support for the (optional) AC
’97 Rev. 2.1 compliant mappings from slots in AC Link Out-
put Frames to the audio DACs for each of the four Codec
Identity modes. AMAP = 1 indicates that the default mapping
(as realized after reset) of Slots-to-DACs conforms to Table
1. Slots in AC Link Input Frames are always mapped such
that PCM data from the left ADC channel is carried by slot 3
and PCM data from the right ADC channel by slot 4. Output
Frames are those carried by the SDATA_OUT signal from
the controller to the codec while Input Frames are those
carried by the SDATA_IN signal from the codec to the
controller.
SLOT 0: TAG bits in Output Frames (controller to codec)
Bit 15
14
13
12
11
10
987654321
0
Valid
Frame
Slot 1
Valid
Slot 2
Valid
Slot 3
Valid
Slot 4
Valid
X
Slot 6
Valid
Slot 7
Valid
Slot 8
Valid
Slot 9
Valid
XXXX
ID1
ID0
Extended Audio ID register (28h): Support for Multiple Codecs
Reg
Name
D15 D14 D13 D12 D11 D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
28h
Extended
Audio ID
ID1
ID0
XXXX
AMAP
XXXXXXXX
VRA
X201h
TABLE 1. AMAP Slot-to-DAC Audio MAPping
Codec Identity
Mode
ID1
(D15, 28h)
ID0
(D14, 28h)
Left DAC data
Right DAC data
From Slot #
5.1 Audio channel
From Slot #
5.1 Audio channel
Primary
0
3
Left
4
Right
Secondary 1
0
1
3
Left
4
Right
Secondary 2
1
0
7
Left Surround
8
Right Surround
Secondary 3
1
6
Center
9
LFE
Note 11: AC ’97 Rev 2.1 specifies this allocation of 5.1 Audio channels to these slots in the AC Link Output Frame
LM4550B
www.national.com
28
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4550C-46 WAF | 制造商:Texas Instruments 功能描述: |
| LM4550VH | 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) |
| 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 |
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