2024年4月7日发(作者：长孙奇正)
Avance Logic, Inc.
ALC202
ALC202
AC’97 Audio CODEC
Draft Spec.
Preliminary
Version 0.62
September 26, 2001
Preliminary
Avance Logic, Inc.
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ALC202
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-bitvolume 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/8W 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.
14.318MHzà24.576MHz 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
Description
2.1 Digital I/O pins: 11 pins
Name
RESET#
XTL-IN
XTL-OUT
SYNC
BIT-CLK
SDATA-OUT
SDATA-IN
GPIO0
GPIO1
ID0#
EAPD / JD
SPDIFO /
TEST
Type
I
I
O
I
IO
I
O
I/O
I/O
I
O
O
Pin No
11
2
3
10
6
5
8
43
44
45
47
48
Description
AC'97 H/W reset
Crystal input pad
Crystal output pad
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
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@75
W
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
Characteristic Definition
Analog input (1Vrms)
Analog input (1Vrms)
Analog input (1Vrms)
Analog input (1Vrms)
Analog input (1Vrms)
Analog input (1Vrms)
-
2-Rev0.62
Preliminary
2024年4月7日发(作者：长孙奇正)
Avance Logic, Inc.
ALC202
ALC202
AC’97 Audio CODEC
Draft Spec.
Preliminary
Version 0.62
September 26, 2001
Preliminary
Avance Logic, Inc.
es
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
ALC202
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-bitvolume 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/8W 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.
14.318MHzà24.576MHz 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
Description
2.1 Digital I/O pins: 11 pins
Name
RESET#
XTL-IN
XTL-OUT
SYNC
BIT-CLK
SDATA-OUT
SDATA-IN
GPIO0
GPIO1
ID0#
EAPD / JD
SPDIFO /
TEST
Type
I
I
O
I
IO
I
O
I/O
I/O
I
O
O
Pin No
11
2
3
10
6
5
8
43
44
45
47
48
Description
AC'97 H/W reset
Crystal input pad
Crystal output pad
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
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@75
W
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
Characteristic Definition
Analog input (1Vrms)
Analog input (1Vrms)
Analog input (1Vrms)
Analog input (1Vrms)
Analog input (1Vrms)
Analog input (1Vrms)
-
2-Rev0.62
Preliminary