AK4544A datasheet(3/35 Pages) AKM

Part #	AK4544A

Description	AC97 MULTIMEDIA AUDIO CODEC WITH SRC

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Manufacturer	AKM [Asahi Kasei Microsystems]

Direct Link	http://www.akm.com

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[ASAHI KASEI]

[AK4544A]

<MS0026-E-00>

2000/04

- 3 -

Pin/Function

No.

Signal Name

I/O

Description

1

DVdd1

-

Digital power supply; 3.3V or 5.0V(DVdd1 = DVdd2)

0.1uF + 4.7uF capacitors should be connected to digital ground.

2

XTL_IN

(MCLKI)

I

24.576MHz(512fs) Crystal is normally connected.

If crystal is not connected, external clock can be used.

3

XTL_OUT(open)

O

24.576MHz(512fs) Crystal. If external clock is used, this pin should be open.

4

DVss1

-

Digital Ground; 0V.

This pin should be directly connected to DVss2 on board.

5

SDATA_OUT

I

Serial 256-bit AC’97 data stream from digital controller

6

BIT_CLK

I/O

12.288MHz(256fs) serial data clock

Output at Primary codec. Input at Secondary codec.

7

DVss2

-

Digital Ground; 0V.

This pin should be directly connected to DVss1 on board.

8

SDATA_IN

O

Serial 256-bit AC’97 data stream to digital controller

9

DVdd2

-

Digital power supply; 3.3V or 5.0V(DVdd1 = DVdd2)

0.1uF + 4.7uF capacitors should be connected to digital ground.

10

SYNC

I

AC’97 Sync Clock, 48kHz(1fs) fixed rate sampling rate

11

RESET#

I

AC’97 Master Hardware Reset

12

PC_BEEP

I

PC Speaker beep pass through

13

PHONE

I

From telephony subsystem speakerphone

14

AUX_L

I

Aux Left Channel

15

AUX_R

I

Aux Right Channel

16

VIDEO_L

I

Video Audio Left Channel

17

VIDEO_R

I

Video Audio Right Channel

18

CD_L

I

CD Audio Left Channel

19

CD_GND

I

CD Audio analog ground

CD_GND or analog ground should be connected through capacitor.

20

CD_R

I

CD Audio Right Channel

21

MIC1

I

Desktop Microphone Input

22

MIC2

I

Second Microphone Input

23

LINE_IN_L

I

Line In Left Channel

24

LINE_IN_R

I

Line In Right Channel

25

AVdd1

-

Power supply; 5.0V(AVdd1=AVdd2)

0.1uF + 4.7uF capacitors should be connected to AVss1(analog ground).

26

AVss1

-

Analog Ground; 0V

27

Vref

O

Reference Voltage Output;

0.1

µF +4.7µF capacitors should be connected to Avss1(analog ground).

28

VrefOut

O

Reference Voltage Output (2.5V,1.25mA)

29

AFILTL

O

Anti-Aliasing Filter Cap; Connected to analog ground with 1nF capacitor.

30

AFILTR

O

Anti-Aliasing Filter Cap; Connected to analog ground with 1nF capacitor.

31

VRAD

O

Vref for ADC ; 0.1

µF capacitor should be connected to analog ground.

32

PLLfilter

O

Loop filter for PLL is connected; 36k resistor and 33nF capacitor in series and

390pF capacitor.

33

VRDA

O

Vref for DAC; 0.1

µF capacitor should be connected to analog ground.

34

3Dcap

O

3D Enhancement Cap; 27nF capacitor should be connected to analog ground.

35

LINE_OUT_L

O

Line Out Left Channel

36

LINE_OUT_R

O

Line Out Right Channel

37

MONO_OUT

O

To telephony subsystem speakerphone

38

AVdd2

-

Power supply; 5.0V(AVdd1=AVdd2)

0.1uF capacitor should be connected to AVss2(analog ground).

39

LNLVL_OUT_L

O

True Line Level Out Left Channel

40

NC

-

No Connection

41

LNLVL_OUT_R

O

True Line Level Out Right Channel

42

AVss2

-

Analog Ground

43

TEST2

I

Test pin (This pin should be open for normal operation):With internal pull-down.

44

TEST3

I

Test pin (This pin should be open for normal operation):With internal pull-down.

45

Codec ID0#

I

Codec ID configuration(ID select input for multiple codec extension) See Page21.

Negative logic input. With internal pull-up.

46

Codec ID1#

I

Codec ID configuration(ID select input for multiple codec extension) See Page21.

Negative logic input. With internal pull-up.

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