AD1981B Analog Devices, AD1981B Datasheet - Page 8

• Manufacturer Part Number: AD1981B
• Description: AD1981B AC'97 SoundMAX® Codec
• Manufacturer: Analog Devices

AD1981B
Pin No.
DIGITAL I/O
2
3
5
6
8
10
11
48
CHIP SELECTS (These pins can also be used to select an external clock. See Table IX.)
45
46
JACK SENSE AND EAPD
17
16
47
ANALOG I/O
13
14
15
18
19
20
21
22
23
24
35
36
37
39
41
FILTER/REFERENCE (These signals are connected to resistors, capacitors, or specific voltages.)
27
28
29
30
31
32
POWER AND GROUND SIGNALS
1
4
7
9
25
26
38
40
43
44
34
33
NO CONNECTS
12
42
Mnemonic
XTL_IN
XTL_OUT
SDATA_OUT
BIT_CLK
SDATA_IN
SYNC
RESET
SPDIF
ID0
ID1
JS0
JS1
EAPD
PHONE_IN
AUX_L
AUX_R
CD_L
CD_GND_REF
CD_ R
MIC1
MIC2
LINE_IN_L
LINE_IN_R
LINE_OUT_L
LINE_OUT_R
MONO_OUT
HP_OUT_L
HP_OUT_R
V
V
AFILT1
AFILT2
AFILT3
AFILT4
DV
DV
DV
DV
AV
AV
AV
AV
AV
AV
AV
AV
NC
NC
REF
REFOUT
DD
SS
DD
SS
DD
SS
DD
SS
DD
SS
SS
DD
1
2
3
4
1
2
1
2
3
4
1
2
I/O
I
O
I
O/I
O
I
I
O
I
I
I
I
O
I
I
I
I
I
I
I
I
I
I
O
O
O
O
O
O
O
O
O
O
O
I
I
I
I
I
I
I
I
I
I
I
I
PIN FUNCTION DESCRIPTIONS
Function
Crystal Input (24.576 MHz) or External Clock Input
Crystal Output
AC-Link Serial Data Output, AD1981B Data Input Stream
AC-Link Bit Clock Output (12.288 MHz) or Bit Clock Input if Secondary Mode
Selected
AC-Link Serial Data Input, AD1981B Data Output Stream
AC-Link Frame Sync
AC-Link Reset, AD1981B Master Hardware Reset
S/PDIF Output
Chip Select Input 0 (Active Low). This pin can also be used as the chain input from
a secondary codec.
Chip Select Input 1 (Active Low)
Jack Sense 0 Input
Jack Sense 1 Input
External Amp Power-Down Control
Phone Input. Mono input from telephony subsystem speaker phone or handset.
Auxiliary Input Left Channel
Auxiliary Input Right Channel
CD Audio Left Channel
CD Audio Analog Ground Reference for Differential CD Input
CD Audio Right Channel
Microphone 1 Input (Mono) or Left Channel when 2-Channel Mode
Selected (Stereo MIC)
Microphone 2 Input (Mono) or Right Channel when 2-Channel Mode
Selected (Stereo MIC)
Line In Left Channel
Line In Right Channel
Line Out (Front) Left Channel
Line Out (Front) Right Channel
Monaural Output to Telephony Subsystem Speakerphone
Headphone Left Channel Output
Headphone Right Channel Output
Voltage Reference Filter
Voltage Reference Output 5 mA Drive (Intended for MIC Bias and Power Amp Bias)
Antialiasing Filter Capacitor—ADC Right Channel
Antialiasing Filter Capacitor—ADC Left Channel
Antialiasing Filter Capacitor—Mixer ADC Right Channel
Antialiasing Filter Capacitor—Mixer ADC Left Channel
Digital V
Digital GND
Digital GND
Digital V
Analog V
Analog GND
Analog V
Analog GND
Analog V
Analog GND
Analog V
Analog GND
No Connect
No Connect
DD
DD
DD
DD
DD
DD
3.3 V
3.3 V
5.0 V
5.0 V
5.0 V
5.0 V
–8–
REV. A