參數(shù)資料
型號： AD1981BJST-REEL
廠商： Analog Devices Inc
文件頁數(shù)： 15/32頁
文件大?。?/td> 0K
描述： IC CODEC STEREO MICPREAMP 48LQFP
標(biāo)準(zhǔn)包裝： 1
系列： SoundMAX®
類型： 音頻編解碼器 '97
數(shù)據(jù)接口： 串行
分辨率（位）： 16，20 b
ADC / DAC 數(shù)量： 4 / 2
三角積分調(diào)變： 無
動態(tài)范圍，標(biāo)準(zhǔn) ADC / DAC (db)： 85 / 90
電壓 - 電源，模擬： 4.5 V ~ 5.5 V
電壓 - 電源，數(shù)字： 3 V ~ 3.47 V
工作溫度： 0°C ~ 70°C
安裝類型： 表面貼裝
封裝/外殼： 48-LQFP
供應(yīng)商設(shè)備封裝： 48-LQFP（7x7）
包裝： 標(biāo)準(zhǔn)包裝
其它名稱： AD1981BJSTREELDKR
AD1981B
Rev. C | Page 22 of 32
EXTENDED AUDIO ID REGISTER
Index 0x28
Reg No.
Name
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
0x28
Ext’d Audio ID
IDC1
IDC0
X
REVC1
REVC0
AMAP
X
DSA1
DSA0
X
SPDIF
X
VRAS
0xX605
The extended audio ID register identifies which extended audio features are supported. A nonzero extended audio ID value indicates that one or more of the
extended audio features are supported.
All registers are not shown, and bits containing an X are assumed to be reserved.
Table 30.
Bit
Mnemonic
Function
VRAS
Variable Rate PCM Audio
Support (Read-Only)
This bit returns a 1 when Read To indicates that the variable rate PCM audio is supported.
SPDIF
SPDIF Support (Read-Only)
This bit returns a 1 when Read To indicates that the SPDIF transmitter is supported (IEC958).
This bit is also used to validate that the SPDIF transmitter output is enabled. The SPDIF bit can
be set high only if the SPDIF pin (Pin 48) is pulled down at power-up, enabling the codec
transmitter logic. If the SPDIF pin is floating or pulled high at power-up, the transmitter logic
is disabled; therefore, this bit returns a low, indicating that the SPDIF transmitter is not
available. This bit must always be read back to verify that the SPDIF transmitter is actually
enabled.
DSA [1:0]
DAC Slot Assignments
(Read/Write)
Reset default = 00.
00 DACs 1, 2 = 3 and 4.
01 DACs 1, 2 = 7 and 8.
10 DACs 1, 2 = 6 and 9.
11 Reserved.
AMAP
Slot DAC Mappings Based
on Codec ID (Read-Only)
This bit returns a 1 when read to indicate that slot/DAC mappings based on the codec ID are
supported.
REVC [1:0]
AC ’97 Revision Compliance
REVC [1:0] = 01 indicates that the codec is AC ’97 revision 2.2 compliant (read-only).
IDC [1:0]
Indicates Codec
Configuration (Read-Only)
00 = Primary.
01, 10, 11 = Secondary.
EXTENDED AUDIO STATUS AND CONTROL REGISTER
Index 0x2A
Reg
No.
Name
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
0x2A
Ext’d Audio
Stat/Ctrl
VFORCE
X
SPCV
X
SPSA1
SPSA0
X
SPDIF
X
VRA
0x0000
All registers are not shown, and bits containing an X are assumed to be reserved.
The extended audio status and control register is a read/write register that provides status and control of the extended audio features.
Table 31.
Bit
Mnemonic
Function
VRA
Variable Rate Audio
(Read/Write)
VRA = 0 sets the fixed sample rate audio to 48 kHz (reset default).
VRA = 1 enables variable rate audio mode (enables sample rate registers and SLOTREQ
signaling).
SPDIF
SPDIF Transmitter
Subsystem Enable/Disable
Bit (Read/Write)
SPDIF = 1 enables the SPDIF transmitter.
SPDIF = 0 disables the SPDIF transmitter (default).
This bit is also used to validate that the SPDIF transmitter output is enabled. The SPDIF bit can
be set high only if the SPDIF pin (Pin 48) is pulled down at power-up, enabling the codec
transmitter logic. If the SPDIF pin is floating or pulled high at power-up, the transmitter logic is
disabled and this bit returns a low, indicating that the SPDIF transmitter is not available. This bit
must always be read back to verify that the SPDIF transmitter is enabled.
SPSA [1:0]
SPDIF Slot Assignment Bits
(Read/Write)
These bits control the SPDIF slot assignment and respective defaults, depending on the codec
ID configuration.
OBSOLETE
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD1981BJSTZ 制造商:Analog Devices 功能描述:IC AUDIO CODEC
AD1981BJSTZ1 制造商:AD 制造商全稱:Analog Devices 功能描述:AC 97 SoundMAX Codec
AD1981BJSTZ2 制造商:AD 制造商全稱:Analog Devices 功能描述:AC ’97 SoundMAX Codec
AD1981BJSTZ-REEL 制造商:Analog Devices 功能描述:Audio Codec 4ADC / 2DAC 20-Bit 48-Pin LQFP T/R 制造商:Rochester Electronics LLC 功能描述:AC'97 SOUNDMAX CODEC W/STEREO MIC PREAMP - Tape and Reel 制造商:Analog Devices 功能描述:IC AUDIO CODEC
AD1981BJSTZ-REEL2 制造商:AD 制造商全稱:Analog Devices 功能描述:AC ’97 SoundMAX Codec
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