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參數(shù)資料
| 型號： | AD1981BLJSTZ-REEL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 消費家電 |
| 英文描述： | AC 97 SoundMAX Codec |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| 封裝： | LEAD FREE, MS-026BBC, LQFP-48 |
| 文件頁數(shù)： | 21/32頁 |
| 文件大小： | 326K |
| 代理商： | AD1981BLJSTZ-REEL |
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AD1981BL
POWER-DOWN CONTROL/STATUS REGISTER
Index 0x26
Rev. A | Page 21 of 32
Reg No.
0x26
The ready bits are read-only; writing to REF, ANL, DAC, ADC has no effect. These bits indicate the status for the AD1981BL subsections. If the bit is a 1, that subsection
is ready. Ready is defined as the subsection able to perform in its nominal state.
All registers are not shown, and bits containing an X are assumed to be reserved.
Table 28.
Bit
Mnemonic
Function
ADC
ADC Sections Ready to Transmit Data.
DAC
DAC Sections Ready to Accept Data.
ANL
Analog Amplifiers, Attenuators, and Mixers Ready.
REF
Voltage References, V
REF
and V
REFOUT
, Up to Nominal Level.
PR [6:0]
Codec Power-
Down Modes
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 powered up. PR5 has no effect unless all ADCs,
DACs, and the ac-link are powered down. The reference and the mixer can be either powered up or
powered 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
Power-Down
Control
EAPD = 1 sets the EAPD pin high, shutting the external power amplifier off.
Name
Power-Down Ctrl/Stat
D15
EAPD
D14
PR6
D13
PR5
D12
PR4
D11
PR3
D10
PR2
D9
PR1
D8
PR0
D7
X
D6
X
D5
X
D4
X
D3
REF
D2
ANL
D1
DAC
D0
ADC
Default
0x000X
The first three bits are to be used individually rather than in combination with each other. PR3 can be
Controls the state of the EAPD pin.
EAPD = 0 sets the EAPD pin low, enabling an external power amplifier (reset default).
Table 29.
Power-Down State
ADCs and Input MUX Power-Down
DACs Power-Down
Analog Mixer Power-Down (V
REF
and V
REFOUT
On)
Analog Mixer Power-Down (V
REF
and V
REFOUT
Off)
AC-Link Interface Power-Down
Internal Clocks Disabled
ADC and DAC Power-Down
V
REF
Standby Mode
Total Power-Down
Headphone Amp Power-In Standby
Set Bits
PR0
PR1
PR1, PR2
PR0, PR1, PR3
PR4
PR0, PR1, PR4, PR5
PR0, PR1
PR0, PR1, PR2, PR4, PR5
PR0, PR1, PR2, PR3, PR4, PR5, PR6
PR6
PR [6:0]
[000 0001]
[000 0010]
[000 0101]
[000 1011]
[001 0000]
[011 0011]
[000 0011]
[011 0111]
[111 1111]
[100 0000]
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADSP-1981BL | AC 97 SoundMAX Codec |
| AD1981BL | AC ’97 SoundMAX㈢ Codec |
| AD1981BLJSTZ2 | AC ’97 SoundMAX㈢ Codec |
| AD1981BLJSTZ-REEL2 | AC ’97 SoundMAX㈢ Codec |
| AD1981HD | HD Audio SoundMAX Codec |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| AD1981HDJSTZ | 制造商:Analog Devices 功能描述:Audio Codec 2ADC / 2DAC 20-Bit/24-Bit 48-Pin LQFP |
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