參數(shù)資料
型號(hào)： LM4550VH
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類(lèi)： 消費(fèi)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(yè)數(shù)： 22/25頁(yè)
文件大?。?/td> 507K
代理商： LM4550VH
AC’97 2.1 Multiple Codec
(Continued)
10097223
Secondary Codec Register Access Definitions
By definition there can be one Primary Codec (ID00) and up to three Secondary Codecs (ID01, 10, and 11). The Codec ID
functions as a chip select. Secondary devices are individually accessible and they do not share registers.
SLOT0:
Bit 15
Valid
Frame
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Slot 1
Valid
Slot 2
Valid
Slot 3
Valid
Slot 4
Valid
Slot 5
Valid
Slot 6
Valid
Slot 7
Valid
Slot 8
Valid
Slot 9
Valid
ID 1
ID 0
For Secondary Codec access, the controller must invalidate the tag bits for Command Address and Data (Slot 0, bits 14 and 13)
and place a non-zero value (01, 10, or 11) into the Code ID field (Slot 0, bits 1 and 0). The value set in the Codec ID field
determines which of the three possible Secondary Codecs is accessed. Secondary Codecs disregard Command Address and
Data (Slot 0, bits 14 and 13) tag bits when they see a 2-bit Codec ID value (Slot 0, bits 1 and 0) that matches their configuration.
For a read operation, bits 1 and 0 are set when bit 14 (Slot 1) contains valid data. For a write operation, bits 1 and 0 are set when
bits 14 and 13 (Slots 1 and 2) contain valid data. The write operation requires the register address and the write data to be valid
within the same frame. Bits 1 and 0 must be cleared when accessing the primary Codec. They must also be cleared during the
idle period where no register read or write is pending. The physical address of a Codec is determined by the ID (0,1) input pins
(pin 45, and 46).
L
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相關(guān)PDF資料
PDF描述
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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(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)
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(chēng):HTC Korea TAEJIN Technology Co. 功能描述:DUAL OPERATIONAL AMPLIFIERS
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