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參數(shù)資料
| 型號： | AK4544AVQ |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | CABLE ASSEMBLY; BNC MALE TO N MALE; 50 OHM, RG223/U COAX, DOUBLE SHIELDED; 36" CABLE LENGTH |
| 中文描述： | AC97多媒體音頻編解碼器與SRC |
| 文件頁數(shù)： | 27/35頁 |
| 文件大?。?/td> | 381K |
| 代理商： | AK4544AVQ |
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[ASAHI KASEI] [AK4544A]
<MS0026-E-00> - 27 -
Normal
ADCs off
PR0
DACs off
PR1
Digital
I/ F
off
PR4
PR0=1
PR1=1
PR4=1
Shut off
AC-Link
Warm Reset
PR1=0
&
DAC=1
PR0=0
&
ADC=1
AK4544A Powerdown/Powerup flow with analog still alive
n
Powerdown/Powerup sequence of Multiple codec configuration
Under the multiple codec circumstances, there is no restriction on setting PR0(ADC), PR1(DAC), PR2(Mixer),
PR6(L NL VL _OUT) and PR7(E APD) to “1” or “0”.
As suggested in AC’97 Specification Rev2.1, AC-L ink Powerdown(PR”4”) and Vref Powerdown(PR5=”1”) under
the Multiple codec configuration are NOT recommended in order to continue supplying BIT_CL K to Secondary
codecs.
Below table shows the relationship for AC-Link Powerdown/Powerup procedure.
AC-Link Powerdown Procedure
RESET#=L
Subsequent Procedure for Powerup
Cold Reset
Comments
Cold Reset wakes up all of codecs with default register
setting concurrently.
Cold Reset wakes up all of codecs with default register
setting concurrently.
Shutdown(Complete Powerdown)
Cold Reset
Note:
1) The AC-Link Powerdown of Primary AC’97 will stop supplying the BIT_CLK to the Secondary AC’97.
2) When the AC-Link Powerdown is issued to the Secondary of AC’97, the Secondary of AC’97 will go to the AC-
Link Powerdown and Warm Reset will be followed by Syn signal at the next time frame.
n
Testability
Activating the Test Modes
AC ‘97 has two test modes. One is for ATE in circuit test and the other is for vendor specific tests. AC ‘97 enters the ATE in circuit
test mode regardless of SYNC signal (high or low) if SDATA_OUT is sampled high at the trailing edge of RESET#. AC ‘97 enters
AKM test mode in the case of condition below. These cases will never occur during standard operating conditions.
Regardless of the test mode, the AC ‘97 controller must issue a “Cold” reset to resume normal operation of the AC ‘97 Codec.
Test Mode Functions
ATE in circuit test mode
When AC ‘97 is placed in the ATE test mode, its digital AC-link outputs (i.e. BIT_CLK and SDATA_IN) are driven to a high
impedance state. This allows ATE in circuit testing of the AC ‘97 controller.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AK4544 | AC97 MULTIMEDIA AUDIO CODEC WITH SRC |
| AK4545 | AC97 AUDIO CODEC WITH SRC AND DIT |
| AK4545VQ | AC97 AUDIO CODEC WITH SRC AND DIT |
| AK4551 | LOW POWER & SMALL PACKAGE 20BIT CODEC |
| AK4551VT | LOW POWER & SMALL PACKAGE 20BIT CODEC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AK4545 | 制造商:AKM 制造商全稱:AKM 功能描述:AC97 AUDIO CODEC WITH SRC AND DIT |
| AK4545VQ | 制造商:AKM 制造商全稱:AKM 功能描述:AC97 AUDIO CODEC WITH SRC AND DIT |
| AK4550 | 制造商:AKM 制造商全稱:AKM 功能描述:EVALUATION BOARD REV.C FOR AK4550 |
| AK4550VT | 制造商:AKM 制造商全稱:AKM 功能描述:LOW POWER & SMALL PACKAGE 16BIT CODEC |
| AK4550VT-E2 | 制造商:Asahi Kasei Microsystems Co Ltd 功能描述: |
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