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參數(shù)資料
| 型號： | AD1881 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | SNAPAKMAGNETICCIRCUITBREAKER |
| 中文描述： | AC\u0026#39;97聲卡SoundMAX編解碼器 |
| 文件頁數(shù)： | 17/26頁 |
| 文件大?。?/td> | 261K |
| 代理商： | AD1881 |
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AD1881A
–17–
REV. 0
Subsection Ready Register (Index 26h)
u
u
u
u
N m
u
e
R g
e
m
a
N
1
D 5
1
D 4
1
D 3
1
D 2
D 1
1
D 0
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
t
u
a
f
D
26
2 h
t
a
t
S
/
n
C
n
w
o
D
-
r
e
w
o
P
D
P
A
E
X
PR
P 5
PR
P 4
PR
P 3
PR
P 2
PR
P 1
PR
P 0
X
X
X
X
E
R F
AN
A L
DA
D C
AD
A C
/
N/
N A
Note: The ready bits are read only, writing to REF, ANL, DAC, ADC will have no effect. These bits indicate the status for the
AD1881A subsections. If the bit is a one, then that subsection is “
ready
.” Ready is defined as the subsection able to perform in its
nominal state.
ADC
ADC section ready to transmit data.
DAC
DAC section ready to accept data.
ANL
Analog gain, attenuators and mute blocks, and mixers ready.
REF
Voltage References, VREF and VREFOUT up to nominal level.
PR[5:0]
AD1881A Power-Down Modes. The first three bits are to be used individually rather than in combination with each
other. The last bit PR3 can be used in combination with PR2 or by itself. The mixer and reference cannot be
powered down via PR3 unless the ADCs and DACs are also powered down. Nothing else can be powered up until
the reference is up.
PR5 has no effect unless all ADCs, DACs, and the AC-Link are powered down. The reference and the mixer can
either be up or down, but all power-up sequences must be allowed to run to completion before PR5 and PR4 are
both set.
In multiple-codec systems, the master codec’s PR5 and PR4 bits control the slave codec. PR5 is also effective in
the slave codec if the master’s PR5 bit is clear, but the PR4 bit has no effect except to enable or disable PR5.
EAPD
External Audio Amp Power Down. Available when programmed as an AC’97 codec.
0 = Pin 47 set to LO state (default).
1 = Pin 47 set to HI state.
Power-Down State
PR5
PR4
PR3
PR2
PR1
PR0
ADC Power-Down
DAC Power-Down
ADC and DAC Power-Down
Mixer Power-Down
ADC + Mixer Power-Down
DAC + Mixer Power-Down
ADC + DAC + Mixer Power-Down
Standby
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
1
0
0
0
1
1
1
1
1
0
1
1
0
0
1
1
1
1
0
1
0
1
0
1
1
Extended Audio ID Register (Index 28h)
u
u
u
u
N m
u
e
R g
e
m
a
N
1
D 5
1
D 4
1
D 3
1
D 2
D 1
1
D 0
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
t
u
a
f
D
8
2 h
D
I
o
o
i
d
u
A
d
e
d
n
x
e
E
D
D
D
D
I 1
D
D
D
D
D
I 0
D
X
X
X
X
X
X
X
X
X
X
X
X
X
R
V A
h
0
0
0
0
Note: The Extended Audio ID is a read only register.
VRA
Variable Rate Audio. VRA = 1 enables Variable Rate Audio.
ID[1:0]
ID1, ID0 is a 2-bit field that indicates the codec configuration: Primary is 00; Secondary is 01, 10, or 11.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD1881A | AC’97 SoundMAX Codec |
| AD1881AJST | AC’97 SoundMAX Codec |
| AD1885 | AC’97 SoundMAX Codec |
| AD1885JST | AC’97 SoundMAX Codec |
| AD1886 | AC’97 SoundMAX Codec |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD1881A | 制造商:AD 制造商全稱:Analog Devices 功能描述:AC’97 SoundMAX Codec |
| AD1881AJST | 制造商:Rochester Electronics LLC 功能描述:AC97 VERSION 2.1 CODEC - Bulk 制造商:Analog Devices 功能描述: 制造商:Analog Devices 功能描述:IC CODEC AC'97 VERSION 2.1 |
| AD1881AJSTZ | 制造商:Analog Devices 功能描述:IC AUDIO CODEC |
| AD1881AJSTZ-REEL | 制造商:Analog Devices 功能描述:Audio Codec 2ADC / 2DAC 16-Bit 48-Pin LQFP T/R |
| AD1881JST | 制造商:Analog Devices 功能描述:AC'97 SOUNDMAX CODEC 制造商:Analog Devices 功能描述:SOUNDCARD CIRCUITS, 48 Pin, Plastic, QFP |
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