ad1881a Analog Devices, Inc., ad1881a Datasheet - Page 8

• Manufacturer Part Number: ad1881a
• Description: Ac?97 Soundmax Codec
• Manufacturer: Analog Devices, Inc.

AD1881A
Digital I/O
Pin Name
XTL_IN
XTL_OUT
SDATA_OUT
BIT_CLK
SDATA_IN
SYNC
RESET
Miscellaneous Connections
Pin Name
CS0
CS1
EAPD
MODE
Analog I/O
These signals connect the AD1881A component to analog sources and sinks, including microphones and speakers.
Pin Name
PC_BEEP
PHONE_IN
AUX_L
AUX_R
VIDEO_L
VIDEO_R
CD_L
CD_GND_REF
CD_ R
MIC1
MIC2
LINE_IN_L
LINE_IN_R
LINE_OUT_L
LINE_OUT_R
MONO_OUT
LNLVL_OUT_L
LNLVL_OUT_R
Filter/Reference
These signals are connected to resistors, capacitors, or specific voltages.
Pin Name
VREF
VREFOUT
AFILT1
AFILT2
FILT_R
FILT_L
RX3D
CX3D
LQFP
2
3
5
6
8
10
11
LQFP
45
46
47
48
LQFP
12
13
14
15
16
17
18
19
20
21
22
23
24
35
36
37
39
41
LQFP
27
28
29
30
31
32
33
34
I/O
I
O
I
O
O
I
I
I/O
I
I
O
I
I/O
I
I
I
I
I
I
I
I
I
I
I
I
I
O
O
O
O
O
I/O
O
O
O
O
O
O
O
I
PIN FUNCTION DESCRIPTIONS
Description
Crystal (or Clock) Input, 24.576 MHz.
Crystal Output.
AC-Link Serial Data Output, AD1881A Input Stream.
AC-Link Bit Clock. 12.288 MHz Serial Data Clock. Daisy Chain Output Clock.
AC-Link Serial Data Input. AD1881A Output Stream.
AC-Link Frame Sample Sync 48 kHz Fixed Rate.
AC-Link Reset. AD1881A Master H/W Reset.
Description
Chip Select 0.
Chip Select 1.
External Amp Power-Down Control Signal, Default LO, Active HI
MODE Select.
Description
PC Beep. PC Speaker Beep Passthrough.
Phone. From Telephony Subsystem Speakerphone or Handset.
Auxiliary Input Left Channel.
Auxiliary Input Right Channel.
Video Audio Left Channel.
Video Audio Right Channel.
CD Audio Left Channel.
CD Audio Analog Ground Reference for Pseudo-Differential CD Input.
CD Audio Right Channel.
Microphone 1. Desktop Microphone Input.
Microphone 2. Second Microphone Input.
Line In Left Channel.
Line In Right Channel.
Line Out Left Channel.
Line Out Right Channel.
Monaural Output to Telephony Subsystem Speakerphone.
Line-Level Output Left Channel.
Line-Level Output Right Channel.
Description
Voltage Reference Filter.
Voltage Reference Output 5 mA Drive (Intended for MIC Bias).
Antialiasing Filter Capacitor—ADC Right Channel.
Antialiasing Filter Capacitor—ADC Left Channel.
AC-Coupling Filter Capacitor—ADC Right Channel.
AC-Coupling Filter Capacitor—ADC Left Channel.
3D PHAT Stereo Enhancement—Capacitor.
3D PHAT Stereo Enhancement—Capacitor.