參數(shù)資料
型號(hào)： AK4543VQ
廠商： Asahi Kasei Microsystems Co.,Ltd
元件分類(lèi)： Codec
英文描述： AC’97 Rev 2.1 Multimedia Audio CODEC
中文描述： AC\u0026#39;97音效活2.1多媒體音頻編解碼器
文件頁(yè)數(shù)： 15/31頁(yè)
文件大?。?/td> 385K
代理商： AK4543VQ
[ASAHI KASEI]
[AK4543]
<M0046-E-01>
1999/01
- 15 -
n
AC-link Input Frame(SDATA_IN)
Each AC-link frame consists of one 16bit tag phase and twelve 20bit slots used for data and control.
a)
Slot0
Slot0 is a special frame, and consists of 16bits. Slot0 is also called the Tag phase. The AK4543 supports bits
15-11 and bits1-0. Each bit indicates 1=valid(normal operation) or ready, 0=invalid(abnormal operation) or not
ready.
If the first bit in the slot 0 is valid, the AK4543 is ready for normal operation.
3
If the Codec Ready bit is invalid,
the following bits and remaining slots are all 0. The AC97 controller should ignore the following bits in the slot
0 and all other slots.
Bit 14 means that Slot 1(Status Address) output is valid or invalid. And Bit 13 means that Slot 2(Status Data ) is
valid or invalid.
The following table shows the relationship between Bit 14,13 and each Status of the AK4543.
Bit 15
(Codec Ready)
1
Bit 14
(Status Address)
1
Bit 13
(Status Data)
1
Status
There is a Read Command in the previous frame.
Then both Slot 1 and Slot 2 output normal data.
If the access to non-implemented register or odd register is requested, the AK4543
returns valid 7-bit register address in slot 1 and returns valid0000h data in slot
2 on the next AC-link frame.
Prohibited or non-existing
There is no Read Command in the previous frame. Both Slot 1 and Slot 2 output
All0.
Prohibited or non-existing
1
1
1
0
0
0
1
0
1
Note 1). The above Read sequence is done as response for previous frames read command. That is, if the previous
frame is a Write Command, AK4543 outputs bit14 =0, bit13 =0 and slot 1&2 = All0.
Bit12 means the output of Slot 3(PCM(ADC) Left) is valid or invalid. And Bit 11 means the output of Slot
4(PCM(ADC)Left) is valid or invalid. Bits10-0 are filled with 0.
A new audio input frame begins with a low to high transition of SYNC. SYNC is synchronous to the rising edge of BIT_CLK. On the
immediately following falling edge of BIT_CLK, the AK4543 samples the assertion of SYNC. This falling edge marks the time when
both sides of AC-link are aware of the start of a new audio frame. On the next rising of BIT_CLK, the AK4543 transitions SDATA_IN
into the first bit position of slot 0 (“Codec Ready” bit). Each new bit position is presented to AC-link on a rising edge of BIT_CLK, and
subsequently sampled by the AC ’97 controller on the following falling edge of BIT_CLK. This sequence ensures that data transitions,
and subsequent sample points for both incoming and outgoing data streams are time aligned.
0
Bit4
1/0
1/0
Slot6
Slot7
Slot5
Slot4
Slot3
Slot2
Slot1
Codec
Ready
1/0
Bit15Bit14 Bit13 Bit12 Bit11 Bit10 Bit9
SYNC
Slot 1
SDATA_IN
BIT_CLK
1/0 1/0
0
Bit8
0
0
Slot12
0
0
Bit1 Bit0
0
Bit2
0
Bit3
Slot8
Slot11
0
Bit7
b)
Slot1
Audio input frame slot1’s stream echoes the control register index, for historical reference, for the data to be returned in slot2.
(Assuming that slots1 valid bit and slot2 valid bit in the slot0 had been tagged “valid” by the AK4543)
Status Address Port
Bit15
1/0
1/0
Bit14
Bit16
Bit17
Bit18
Bit19
Status Address Port
Slot 2
Slot 0
Slot 1
SDATA_IN
BIT_CLK
1/0 1/0
0
0
0
0
0
Bit9
Bit9
Bit10
Bit12
Bit11
Bit13
1/0 1/0 1/0
0
Bit2
0
0
Bit16
Bit0
Bit1
Bit17
Bit18
Bit19
3
When the AC’97 is not ready for normal operation, output bits are not specified in this documents and should be considered as
invalid.
相關(guān)PDF資料
PDF描述
AK4544A AC97 MULTIMEDIA AUDIO CODEC WITH SRC
AK4544AVQ CABLE ASSEMBLY; BNC MALE TO N MALE; 50 OHM, RG223/U COAX, DOUBLE SHIELDED; 36" CABLE LENGTH
AK4544 AC97 MULTIMEDIA AUDIO CODEC WITH SRC
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AK4545VQ AC97 AUDIO CODEC WITH SRC AND DIT
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AK4544 制造商:AKM 制造商全稱:AKM 功能描述:AC97 MULTIMEDIA AUDIO CODEC WITH SRC
AK4544A 制造商:AKM 制造商全稱:AKM 功能描述:AC97 MULTIMEDIA AUDIO CODEC WITH SRC
AK4544AVQ 制造商:AKM 制造商全稱:AKM 功能描述:AC97 MULTIMEDIA AUDIO CODEC WITH SRC
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
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