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PDF ALC250-LF Data sheet ( Hoja de datos )
| Número de pieza | ALC250-LF | |
| Descripción | 2-Channel AC97 2.3 Audio Codec | |
| Fabricantes | Realtek Microelectronics | |
| Logotipo |  |
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ALC250
ALC250-LF
TWO-CHANNEL AC’97 2.3 AUDIO CODEC
with EQUALIZER
www.DataSheet.co.kr
DATASHEET
Rev. 1.3
06 December 2005
Track ID: JATR-1076-21
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  
ALC250 DataSheet
1. General Description
The ALC250 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 ALC250 incorporates proprietary converter technology to
achieve a high SNR, greater than 100 dB, sensing logics for device reporting, and Universal Audio Jack® to enhance user
convenience. The ALC250 AC'97 CODEC supports multiple CODEC extensions with independent variable sampling rates and
built-in 3D effects. The ALC250 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 ALC250 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. The ALC250 integrates a 50mW/20Ω headset audio
amplifier into the CODEC, saving BOM costs. The ALC250 also supports the SPDIF out function, which complies with AC'97 2.3,
and offers easy connection of PCs to consumer electronic products, such as AC3 decoder/speaker and mini disk devices.
The ALC250 CODEC supports host/soft audio from Intel ICHx chipsets as well as audio controller based
VIA/SIS/ALI/AMD/nVIDIA/ ATI chipset. Bundled Windows series drivers (WinXP/ME/2000/98/NT), EAX/ Direct Sound 3D/
I3DL2/ A3D compatible sound effect utilities (supporting Karaoke, 26-kind of environment sound emulation, and 10 software
equalizer bands), HRTF 3D positional audio and Sensaura™ 3D (optional) provide an excellent entertainment package and game
experience for PC users. Integrated 14.318MÆ24.576MHz PLL generate required clock to eliminate the need for external crystal.
The ALC250 also builds-in seven bands of digital hardware equalizer and cascades one lowpass filter, five bandpass filters, and one
highpass filter. It optimizes frequency response on mobile PC speakers.
2. Features
z Built- in 7 Bands of Digital Hardware Equalizer
for Optimizing Speaker Response
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 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
z 3D Stereo Enhancement
www.DataSheet.co.kr
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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
EQ operation can be controlled by 2 pins of
serial bus
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
Power support: Digital: 3.3V; Analog: 3.3V/5V
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 Kara
OK mode
AVRack® Media Player
Configuration Panel to improve Experience of
User
Two-Channel AC’97 2.3 Audio Codec
1
Rev1.3
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
ALC250 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. NAME D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 DEFAU
(HEX)
LT
00h Reset X SE4 SE3 SE2 SE1 SE0 ID9 ID8 ID7 ID6 ID5 ID4 ID3 ID2 ID1 ID0 0190h
02h Master Mute X ML5 ML4 ML3 ML2 ML1 ML0 RM* X MR5 MR4 MR3 MR2 MR1 MR0 8000h
Volume
04h Headphone Mute X HPL HPL HPL HPL HPL HPL RM* X HPR HPR HPR HPR HPR HPR 8000h
volume
543210
543210
06h Mono-Out Mute X X X X X X X X X X MM MM MM MM MM 8000h
Volume
43210
0Ah PC_BEEP Mute X X F7 F6 F5 F4 F3 F2 F1 F0 PB3 PB2 PB1 PB0 X 8000h
Volume
0Ch PHONE Mute X X X X X X X X X X PH4 PH3 PH2 PH1 PH0 8008h
Volume
0Eh MIC Volume Mute X X X X X BGO BGO X BC X MI4 MI3 MI2 MI1 MI0 8008h
10
10h Line-In Mute X X NL4 NL3 NL2 NL1 NL0 RM* X X NR4 NR3 NR2 NR1 NR0 8808h
Volume
12h CD Volume Mute X X CL4 CL3 CL2 CL1 CL0 RM* X X CR4 CR3 CR2 CR1 CR0 8808h
16h Aux Volume Mute X X AL4 AL3 AL2 AL1 AL0 RM* X X AR4 AR3 AR2 AR1 AR0 8808h
18h PCM Out Mute X X PL4 PL3 PL2 PL1 PL0 RM* X X PR4 PR3 PR2 PR1 PR0 8808h
Volume
1Ah Record X X X X X LRS LRS LRS X X X X X RRS RRS RRS 0000h
Select
210
210
1Ch ADC Mute X X X LRG LRG LRG LRG X X X X RRG RRG RRG RRG 8000h
Record Gain
3210
3210
1Eh MIC ADC Mute X X X LM LM LM LM X X X X RM RM RM RM 8000h
Record Gain
RG3 RG2 RG1 RG0
RG3 RG2 RG1 RG0
20h General POP X 3D X DRS DRS MIX MS LBK X X X X X X X 0400h
Purpose
S1 S0
www.DataSheet.co.kr
22h 3D Control X X X X X X X X X X X X X DP2 DP1 DP0 0000h
24h Audio Int. & I4 I3 I2 I1 I0 X X X X X X X PG3 PG2 PG1 PG0 0000h
Paging
26h Power Down EAP PR6 PR5 PR4 PR3 PR2 PR1 PR0 X X X X REF ANL DAC ADC 000Fh
Ctrl/Status D
28h Extended ID1 ID0 X X REV REV AM X X X X X X SPD DRA VRA 0A07h
Audio ID
1 0 AP
IF
2Ah Extended X X X X X SPC X X X X SPS SPS X SPD DRA VRA 0000h
Audio Status
V
A1 A0
IF
2Ch PCM front FSR FSR FSR FSR FSR FSR FSR FSR FSR FSR FSR FSR FSR FSR FSR FSR BB80h
Out Sample 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Rate
32h 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
34h 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
3Ah S/PDIF Ctl V DRS SPS SPS L CC6 CC5 CC4 CC3 CC2 CC1 CC0 PRE COP /AU PRO 2000h
R1 R0
Y DIO
60h/ Vendor 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0000h
6Eh Define
76h GPIO Setup 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0000h
78h GPIO Status 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0000h
7Ch Vendor ID1 F7 F6 F5 F4 F3 F2 F1 F0 S7 S6 S5 S4 S3 S2 S1 S0 414Ch
7Eh Vendor ID2 T7 T6 T5 T4 T3 T2 T1 T0 DEV DEV DEV DEV DEV DEV DEV DEV 4750h
76543210
Two-Channel AC’97 2.3 Audio Codec
6
Rev1.3
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
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| PDF Descargar | [ Datasheet ALC250-LF.PDF ] | |
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