參數(shù)資料
型號： ALC202
廠商： Electronic Theatre Controls, Inc.
元件分類： 圓形連接器
英文描述： Circular Connector; No. of Contacts:100; Series:MS27484; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:22; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:22-35 RoHS Compliant: No
中文描述： AC\u0026#39;97音頻編解碼器
文件頁數(shù)： 2/29頁
文件大?。?/td> 598K
代理商： ALC202
Preliminary
Avance Logic, Inc.
ALC202
-
2 -
Rev0.62
http://www.realtek.com.tw
1. Features
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Single chip audio CODEC with high S/N ratio (>90 dB).
20-bit DAC, 18-bit ADC.
Stereo full-duplex CODEC with independent and variable sampling rate.
4 analog line-level stereo input with 5-bit volume control : LINE_IN,CD,VIDEO,AUX
2 analog line-level mono input : PC_BEEP,PHONE_IN.
Mono output with 5-bit volume control.
Stereo output with 6-bit volume control.
2 MIC inputs: Software selectable.
Power management and enhanced power saving.
3D Stereo Enhancement
External Amplifier power down capability.
Multiple CODEC extension.
Compliant with AC’97 2.2 specification
50mW/8
amplifier at LINE/ Headphone output
Jack-detect function to mute LINE/MONO/HP output, to control S/PDIF output.
Supports S/PDIF out is compliant with AC’97 rev2.2.
2 GPIO pins.
14.318MHz
à
24.576MHz digital PLL.
Supports double sampling rate (96KHz) of DVD audio playback.
+30dB boost preamplifier for MIC input.
Power support: Digital: 3.3V Analog: 3.3V/5V
Standard 48-Pin
LQFP
Package
2. Pin Description
2.1 Digital I/O pins: 11 pins
Name
Type
RESET#
I
XTL-IN
I
Pin No
11
2
Description
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.
AC'97 H/W reset
Crystal input pad
XTL-OUT
O
3
Crystal output pad
SYNC
BIT-CLK
SDATA-OUT
SDATA-IN
GPIO0
I
10
6
5
8
43
Sample Sync (48KHz)
Bit clock output (12.288Mhz)
Serial TDM AC97 output
Serial TDM AC97 input
I: General purpose input pin-0. (Can
be software volume up)
O: General purpose output pin-0.
I: General purpose input pin-1.
(Can be software volume down)
O: General purpose output pin-1
ID strap 0
External Amplifier power down
control / Jack –Detect sense a low to
high edge
S/PDIF output / TEST output
IO
I
O
I/O
GPIO1
I/O
44
Internally pulled high by a 50K resistor.
ID0#
I
45
47
CMOS input Vt=0.35Vdd
CMOS output / input, JD should be internally pulled
high by a 50K resistor
EAPD / JD
O
SPDIFO /
TEST
O
48
Digital output has
12 mA@75
driving capability.
2.2 Analog I/O Pins: 18 pins
Name
Type
Pin No
PC-BEEP
I
PHONE
I
AUX-L
I
AUX-R
I
VIDEO-L
I
VIDEO-R
I
Description
Characteristic Definition
Analog input (1Vrms)
Analog input (1Vrms)
Analog input (1Vrms)
Analog input (1Vrms)
Analog input (1Vrms)
Analog input (1Vrms)
12
13
14
15
16
17
PC speaker input
Speakerphone input
AUX Left channel
AUX Right channel
Video audio Left channel
Video audio Right channel
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