ALC202 查看數據表（PDF） - Unspecified
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ALC202 Datasheet PDF : 29 Pages
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Avance Logic, Inc.
ALC202
1. Features
l Single chip audio CODEC with high S/N ratio (>90 dB).
l 20-bit DAC, 18-bit ADC.
l Stereo full-duplex CODEC with independent and variable sampling rate.
l 4 analog line-level stereo input with 5-bit volume control : LINE_IN,CD,VIDEO,AUX
l 2 analog line-level mono input : PC_BEEP,PHONE_IN.
l Mono output with 5-bit volume control.
l Stereo output with 6-bit volume control.
l 2 MIC inputs: Software selectable.
l Power management and enhanced power saving.
l 3D Stereo Enhancement
l External Amplifier power down capability.
l Multiple CODEC extension.
l Compliant with AC’97 2.2 specification
l 50mW/8W amplifier at LINE/ Headphone output
l Jack-detect function to mute LINE/MONO/HP output, to control S/PDIF output.
l Supports S/PDIF out is compliant with AC’97 rev2.2.
l 2 GPIO pins.
l 14.318MHzà24.576MHz digital PLL.
l Supports double sampling rate (96KHz) of DVD audio playback.
l +30dB boost preamplifier for MIC input.
l Power support: Digital: 3.3V Analog: 3.3V/5V
l Standard 48-Pin LQFP Package
2. Pin Description
2.1 Digital I/O pins: 11 pins
Name
RESET#
XTL-IN
Type
I
I
Pin No
11
2
Description
AC'97 H/W reset
Crystal input pad
XTL-OUT
O
3
Crystal output pad
SYNC
I
BIT-CLK
IO
SDATA-OUT I
SDATA-IN
O
GPIO0
I/O
GPIO1
I/O
ID0#
I
EAPD / JD
O
SPDIFO /
O
TEST
10
Sample Sync (48KHz)
6
Bit clock output (12.288Mhz)
5
Serial TDM AC97 output
8
Serial TDM AC97 input
43
I: General purpose input pin-0. (Can
be software volume up)
O: General purpose output pin-0.
44
I: General purpose input pin-1.
(Can be software volume down)
O: General purpose output pin-1
45
ID strap 0
47
External Amplifier power down
control / Jack –Detect sense a low to
high edge
48
S/PDIF output / TEST output
Characteristic Definition
Schmitt trigger input
Crystal: 24.576M/14.318M crystal input
External: 24.576M/14.318M external clock input
Crystal: 24.576M/14.318M crystal output
External: 24.576M/14.318M clock output
Schmitt trigger input
CMOS input/output Vt=0.35Vdd
Schmitt trigger input
CMOS output,
Internally pulled high by a 50K resistor.
Internally pulled high by a 50K resistor.
CMOS input Vt=0.35Vdd
CMOS output / input, JD should be internally pulled
high by a 50K resistor
Digital output has 12 mA@75W driving capability.
2.2 Analog I/O Pins: 18 pins
Name
PC-BEEP
PHONE
AUX-L
AUX-R
VIDEO-L
VIDEO-R
Type
I
I
I
I
I
I
Pin No
12
13
14
15
16
17
Description
PC speaker input
Speakerphone input
AUX Left channel
AUX Right channel
Video audio Left channel
Video audio Right channel
-2-
Characteristic Definition
Analog input (1Vrms)
Analog input (1Vrms)
Analog input (1Vrms)
Analog input (1Vrms)
Analog input (1Vrms)
Analog input (1Vrms)
Rev0.62
http://www.realtek.com.tw
Preliminary
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