AD1980 查看數據表（PDF） - Analog Devices

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AD1980

AC ’97 SoundMAX®Codec

Analog Devices 

AD1980

PIN FUNCTION DESCRIPTIONS

Pin Number

Mnemonic

I/O Function

DIGITAL INPUT/OUTPUT

2

XTL_IN

I Crystal Input (24.576 MHz) or External Clock In (24.576 MHz,

14.31818 MHz or 48000 MHz)

3

XTL_OUT

O Crystal Output

5

SDATA_OUT

I AC-Link Serial Data Output. AD1980 Input Stream.

6

BIT_ CLK

O/I AC-Link Bit Clock. 12.288 MHz serial data clock. (Input pin, for

Secondary mode only.)

8

SDATA_IN

O AC-Link Serial Data Input. AD1980 Output Stream.

10

SYNC

11

RESET

I AC-Link Frame Sync

I AC-Link Reset. AD1980 Master H/W Reset.

48

SPDIF

O SPDIF Output

CHIP SELECTS/CLOCK STRAPPING

45

ID0

46

ID1

I Chip Select Input 0 (Active Low). This pin can also be used as the

chain input from a secondary Codec.

I Chip Select Input 1 (Active Low)

JACK SENSE AND EAPD

47

EAPD

17

JS0

16

JS1

ANALOG INPUT/OUTPUT

O EAPD Output

I Jack Sense 0 Input

I Jack Sense 1 Input

13

PHONE_IN

I Monaural Line-Level Input

14

AUX_L

I Auxiliary Input, Left Channel

15

AUX_R

I Auxiliary Input, Right Channel

18

CD_L

I CD Audio Left Channel

19

CD_GND_REF

I CD Audio Analog Ground Reference for Differential CD Input

20

CD_ R

I CD Audio Right Channel

21

MIC1

I Microphone #1 Input (Left Channel when 2-Channel Mode Selected)

22

MIC2

I Microphone #2 Input (Right Channel when 2-Channel Mode Selected)

23

LINE_IN_L

I Line-In Left Channel

24

LINE_IN_R

I Line-In Right Channel

31

CENTER_OUT

O Center Channel Output

32

LFE_OUT

O Low Frequency Enhanced Output

35

LINE_OUT_L

O Line-Out (Front) Left Channel

36

LINE_OUT_R

O Line-Out (Front) Right Channel

37

MONO_OUT

O Monaural Output to Telephone Subsystem Speakerphone

39

SURR_OUT_L/HP_OUT_L O Surround or Front Headphone Left Channel Output

41

SURR_OUT_R/HP_OUT_R O Surround or Front Headphone Right Channel Output

FILTER/REFERENCE

27

VREF

O Voltage Reference Filter

28

VREFOUT

O Voltage Reference Output 5 mA Drive (intended for MIC bias)

29

AFILT1

O Antialiasing Filter Capacitor—ADC Right Channel

30

AFILT2

O Antialiasing Filter Capacitor—ADC Left Channel

REV. 0

–7–

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