參數(shù)資料
型號(hào)： AD1981BLJSTZ2
廠商： Analog Devices, Inc.
元件分類： Codec
英文描述： AC ’97 SoundMAX㈢ Codec
中文描述： ㈢交流\u0026#39;97 SoundMAX編解碼器
文件頁(yè)數(shù)： 21/28頁(yè)
文件大小： 215K
代理商： AD1981BLJSTZ2
REV. 0
AD1981BL
–21–
PRO
Professional. 1 indicates professional use of channel status.
0 indicates consumer.
AUD
Non-Audio. 1 indicates data is non-PCM format.
0 data is PCM.
COPY
Copyright. 1 indicates copyright is asserted.
0 copyright is not asserted.
Pre-Emphasis. 1 indicates filter pre-emphasis is 50
μ
s/15
μ
s.
0 pre-emphasis is none.
PRE
CC[6:0]
Category Code. Programmed according to IEC standards, or as appropriate.
L
Generation Level. Programmed according to IEC standards, or as appropriate.
SPSR[1:0]
SPDIF Transmit Sample Rate.
SPSR[1:0] = 00 Transmit sample rate = 44.1 kHz.
SPSR[1:0] = 01 Reserved.
SPSR[1:0] = 10 Transmit sample rate = 48 kHz (reset default).
SPSR[1:0] = 11 Not supported.
V
Validity. This bit affects the validity flag (Bit 28 transmitted in each SPDIF L/R subframe) and enables the
SPDIF transmitter to maintain connection during error or mute conditions.
V = 1 Each SPDIF subframe (L + R) has Bit 28 set to 1. This tags both samples as invalid.
V = 0 Each SPDIF subframe (L + R) has Bit 28 set to 0 for valid data and 1 for invalid data (error condition).
Note that when V = 0, asserting the VFORCE bit (D15) in Register 2Ah (Ext’d Audio Stat/Ctrl) will force the
Validity flag low, marking both samples as valid.
SPDIF Control Register (Index 3Ah)
Reg
No.
Name
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
3Ah SPDIF
Control
V
X
SPSR1
SPSR0
L
CC6
CC5
CC4
CC3
CC2
CC1
CC0
PRE
COPY
AUD
PRO
2000h
Register 3Ah is a read/write register that controls SPDIF functionality and manages bit fields propagated as channel status (or subframe in the V case). With the
exception of V, this register should be written to only when the SPDIF transmitter is disabled (SPDIF bit in Register 2Ah is 0). This ensures that control and status
information start up correctly at the beginning of SPDIF transmission.
相關(guān)PDF資料
PDF描述
AD1981BLJSTZ-REEL2 AC ’97 SoundMAX㈢ Codec
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AD1981HDJSTZ HD Audio SoundMAX Codec
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD1981BLJSTZ-REEL 制造商:Analog Devices 功能描述:Audio Codec 4ADC / 2DAC 20-Bit 48-Pin LQFP T/R
AD1981BLJSTZ-REEL2 制造商:AD 制造商全稱:Analog Devices 功能描述:AC ’97 SoundMAX㈢ Codec
AD1981BWBSTZ 制造商:Analog Devices 功能描述:
AD1981BWBSTZ-REEL 制造商:Analog Devices 功能描述:ANAAD1981BWBSTZ-REEL AC'97 SOUNDMAX CODE
AD1981HD 制造商:AD 制造商全稱:Analog Devices 功能描述:HD Audio SoundMAX Codec
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