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參數(shù)資料
| 型號(hào)： | LM4545 |
| 廠商： | National Semiconductor Corporation |
| 元件分類(lèi)： | Codec |
| 英文描述： | AC ’97 Codec with Stereo Headphone Amplifier and National 3D Sound |
| 中文描述： | 交流\u0026#39;97編解碼器與立體聲耳機(jī)放大器和國(guó)家3D聲音 |
| 文件頁(yè)數(shù)： | 12/16頁(yè) |
| 文件大小： | 327K |
| 代理商： | LM4545 |
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Application Information
AC Link Serial Interface Protocol
AC Link Output Frame
The audio output frame (output from AC ’97 Controller and
input to theLM4545 ) contains control and PCM data tar-
geted for the LM4545 control register and stereo DAC. The
Tag slot, slot 0, contains 16 bits that tell theAC Link interface
circuitry on the LM4545 the validity of the following data
slots.
A new audio output frame is signaled with a low to high tran-
sition of SYNC. SYNC is synchronous to the rising edge of
BIT_CLK. On the next rising edge of BIT_CLK, the AC ’97
Controller drives SD_OUT with the first bit of slot 0. The
LM4545 samples SD_OUT on the falling edge of BIT_CLK.
The AC ’97 Controller will continue outputting the SD_OUT
stream on each successive rising edge of BIT_CLK.
SD_OUT Slot 0: Tag Phase
The first bit of slot 0 is designated the
″
Valid Frame
″
bit. If
this bit is 1, it indicates that the current data frame contains
at least one slot of valid data and the LM4545 will further
sample the next four bits to determine which frames do in
fact have valid data. Valid slots are signified by a 1 in their re-
spective slot bit position.
Bit
15
Description
Valid Frame
Control
register
address
Control
register data
Left Playback
PCM Data
Comment
1 = Valid Frame
14
1 = Valid slot
13
1 = Valid slot
12
1 = Valid slot
DS100069-4
FIGURE 3. AC 97 Bidirectional Audio Frame
DS100069-6
FIGURE 4. AC Link Audio Output Frame
DS100069-5
FIGURE 5. Start of Audio Output Frame
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| LM4545VH | 功能描述:IC AUDIO CODEC '97 18BIT 48LQFP RoHS:否 類(lèi)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(lèi)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(dòng)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(lèi)型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:48-TQFN-EP（7x7） 包裝:帶卷 (TR) |
| LM4545VHX | 功能描述:IC AUDIO CODEC '97 18BIT 48LQFP RoHS:否 類(lèi)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(lèi)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(dòng)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(lèi)型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:48-TQFN-EP（7x7） 包裝:帶卷 (TR) |
| LM4546 | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:AC 97 Rev 2 Codec with Sample Rate Conversion and National 3D Sound |
| LM4546_09 | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:AC 97 Rev 2 Codec with Sample Rate Conversion and National 3D Sound |
| LM4546A | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:AC 97 Rev 2 Multi-Channel Audio Codec with Sample Rate Conversion and National 3D Sound |
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