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PDF ALC203-LF Data sheet ( Hoja de datos )
| Número de pieza | ALC203-LF | |
| Descripción | 2-Channel AC97 2.3 Audio Codec | |
| Fabricantes | Realtek Microelectronics | |
| Logotipo |  |
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ALC203
ALC203-LF
TWO-CHANNEL AC’97 2.3 AUDIO CODEC
www.DataSheet.co.kr
DATASHEET
Rev. 1.6
28 April 2006
Realtek Semiconductor Corp.
No. 2, Innovation Road II, Hsinchu Science Park, Hsinchu 300, Taiwan
Tel.: +886-3-578-0211. Fax: +886-3-577-6047
www.realtek.com.tw
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
ALC203 DataSheet
1. General Description
The ALC203 AC'97 codec is a 20-bit DAC and 18-bit ADC full duplex AC'97 2.3 compatible stereo audio codec designed for PC
multimedia systems, including host/soft audio and AMR/CNR based designs. The ALC203 incorporates proprietary converter
technology to achieve a high SNR, greater than 100 dB, sensing logic for device reporting, and Universal Audio Jack® to improve
user experience.
The ALC203 supports multiple CODEC extensions with independent variable sampling rates and built-in 3D effects. The ALC203
CODEC provides two pairs of stereo outputs with independent volume controls, a mono output, and multiple stereo and mono
inputs, along with flexible mixing, gain and mute functions to provide a complete integrated audio solution for PCs. The circuitry of
the ALC203 codec operates from a +3.3V digital power and +5V analog power supply with EAPD (External Amplifier Power
Down) control for use in notebook and PC applications. An integrated 14.318MÆ24.576MHz PLL generate required clock to
eliminate the need for external crystal. Built in PCBEEP generator to save buzzer on board.
The ALC203 integrates a 50mW/20Ω headset audio amplifier into the codec, saving BOM costs. The ALC203 also supports the
SPDIF out function, compliant with AC'97 2.3, which offers easy connection of PCs to consumer electronic products, such as AC3
decoder/speaker and mini disk devices. The ALC203 codec supports host/soft audio from Intel ICHx chipsets as well as audio
controller based VIA/SIS/ALI/AMD/nVIDIA/ATI chipsets.
Bundled Windows series drivers (WinXP/ME/2000/98/NT), EAX/ Direct Sound 3D/ I3DL2/ A3D compatible sound effect utilities
(supporting Karaoke, 26-types of environment sound emulation, 10-band equalizer), HRTF 3D positional audio and Sensaura™ 3D
(optional) provide an excellent entertainment package and game experience for PC users.
2. Features
z Single chip with high S/N ratio (>100 dB)
z Meets performance requirements for audio on
PC99/2001 systems
z Meets Microsoft WHQL/WLP 2.0 audio
requirements
z 20-bit DAC and 18-bit ADC resolution
z 18-bit Stereo full-duplex CODEC with
independent and variable sampling rate
z Compliant with AC’97 2.3 specifications
-LINE/HP-OUT, MIC-IN and LINE-IN sensing
-14.318MHz-Æ24.576MHz PLL saves crystal
-12.288MHz BITCLK input can be consumed
-Integrated PCBEEP generator to save buzzer
-Interrupt capability
-Page registers and Analog Plug&Play
z Support of S/PDIF out is fully compliant with
AC’97 rev2.3 specifications
z Three analog line-level stereo inputs with 5-bit
volume control: LINE_IN, CD, AUX
z High quality differential CD input
z Two analog line-level mono input: PCBEEP,
PHONE-IN
z Supports double sampling rate (96KHz) of DVD
audio playback
z Two software selectable MIC inputs
z +6/12/20/30dB boost preamplifier for MIC input
z Stereo output with 6-bit volume control
z Mono output with 5-bit volume control
z Headphone output with 50mW/20Ω amplifier
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3D Stereo Enhancement
Multiple CODEC extension capability
External Amplifier Power Down (EAPD)
capability
Power management and enhanced power saving
features
Stereo MIC record for AEC/BF application
DC Voltage volume control
Auxiliary power to support Power Off CD
Adjustable VREFOUT control
2 GPIO pins with smart GPIO volume control
2 Universal Audio Jack (UAJ)® for front panel
Support 32K/44.1K/48K/96KHz of S/PDIF output
Support 32K/44.1K/48KHz of S/PDIF input
Standard 48-Pin LQFP Package
EAX™ 1.0 & 2.0 compatible
Direct Sound 3D™ compatible
A3D™ compatible
I3DL2 compatible
HRTF 3D Positional Audio
Sensaura™ 3D Enhancement (optional)
10 Bands of Software Equalizer
Voice Cancellation and Key Shifting in
KaraOK mode
AVRack® Media Player
Configuration Panel to improve User
Experience
Two-Channel AC’97 2.3 Audio Codec
1
Rev1.6
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
ALC203 DataSheet
6. Registers
6.1 Mixer Registers
Access to registers with an odd number will return a 0. Reading unimplemented registers will also return a 0. X=Reserved bit.
REG.
(HEX)
00h
02h
04h
06h
0Ah
0Ch
0Eh
10h
12h
16h
18h
1Ah
1Ch
1Eh
20h
22h
24h
26h
28h
2Ah
2Ch
32h
34h
3Ah
60h/
6Eh
76h
78h
7Ch
7Eh
NAME
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 DEFAUL
T
Reset
X SE4 SE3 SE2 SE1 SE0 ID9 ID8 ID7 ID6 ID5 ID4 ID3 ID2 ID1 ID0 0190h
Master Mute X ML5 ML4 ML3 ML2 ML1 ML0 RM* X MR5 MR4 MR3 MR2 MR1 MR0 8000h
Volume
Headphone Mute X HPL5 HPL4 HPL3 HPL2 HPL1 HPL0 RM* X HPR5 HPR4 HPR3 HPR2 HPR1 HPR0 8000h
volume
Mono-Out Mute X X X X X X X X X X MM4 MM3 MM2 MM1 MM0 8000h
Volume
PC_BEEP Mute X X F7 F6 F5 F4 F3 F2 F1 F0 PB3 PB2 PB1 PB0 X 8000h
Volume
PHONE Mute X X X X X X X X X X PH4 PH3 PH2 PH1 PH0 8008h
Volume
MIC Volume Mute X X X X X BGO1 BGO0 X BC X MI4 MI3 MI2 MI1 MI0 8008h
Line-In Mute X X NL4 NL3 NL2 NL1 NL0 RM* X X NR4 NR3 NR2 NR1 NR0 8808h
Volume
CD Volume Mute X X CL4 CL3 CL2 CL1 CL0 RM* X X CR4 CR3 CR2 CR1 CR0 8808h
Aux Volume Mute X X AL4 AL3 AL2 AL1 AL0 RM* X X AR4 AR3 AR2 AR1 AR0 8808h
PCM Out Mute X X PL4 PL3 PL2 PL1 PL0 RM* X X PR4 PR3 PR2 PR1 PR0 8808h
Volume
Record Select X X X X X LRS2 LRS1 LRS0 X X X X X RRS2 RRS1 RRS0 0000h
ADC
Mute X X X LRG3 LRG2 LRG1 LRG0 X X X X RRG3 RRG2 RRG1 RRG0 8000h
Record Gain
MIC ADC Mute X X X LMR LMR LMR LMR X X X X RMR RMR RMR RMR 8000h
Record Gain
G3 G2 G1 G0
G3 G2 G1 G0
General POP X 3D X DRSS DRSS MIX MS LBK X X X X X X X 0400h
Purpose
10
www.DataSheet.co.kr
3D Control X X X X X X X X X X X X X DP2 DP1 DP0 0000h
Audio Int. & I4 I3 I2 I1 I0 X X X X X X X PG3 PG2 PG1 PG0 0000h
Paging
Power Down EAPD PR6 PR5 PR4 PR3 PR2 PR1 PR0 X X X X REF ANL DAC ADC 000Fh
Ctrl/Status
Extended ID1 ID0 X X REV1 REV0 AMA X X X X X X SPDI DRA VRA 0A07h
Audio ID
PF
Extended
X X X X X SPCV X X X X SPSA SPSA X SPDI DRA VRA 0000h
Audio Status
10
F
PCM front Out FSR FSR1 FSR1 FSR1 FSR1 FSR1 FSR9 FSR8 FSR7 FSR6 FSR5 FSR4 FSR3 FSR2 FSR1 FSR0 BB80h
Sample Rate 15 4 3 2 1 0
PCM Input ISR ISR ISR ISR ISR ISR ISR ISR ISR ISR ISR ISR ISR ISR ISR ISR BB80h
Sample Rate 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
MIC Input MSR MSR MSR MSR MSR MSR MSR MSR MSR MSR MSR MSR MSR MSR MSR MSR BB80h
Sample Rate 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
S/PDIF Ctl V DRS SPSR SPSR L CC6 CC5 CC4 CC3 CC2 CC1 CC0 PRE COP /AUD PRO 2000h
10
Y IO
Vendor Define 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0000h
GPIO Setup 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0000h
GPIO Status 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0000h
Vendor ID1 F7 F6 F5 F4 F3 F2 F1 F0 S7 S6 S5 S4 S3 S2 S1 S0 414Ch
Vendor ID2 T7 T6 T5 T4 T3 T2 T1 T0 DEV7 DEV6 DEV5 DEV4 DEV3 DEV2 DEV1 DEV0 4770h
Two-Channel AC’97 2.3 Audio Codec
7
Rev1.6
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
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