82C931 Datasheet, PDF (9/64 Pages) List of Unclassifed Manufacturers – Plug and Play Integrated Audio Controller

OPTi
®
82C931
Plug and Play Integrated Audio Controller
1.0 Features
• Integrated sound controller compatible with:
- Sound Blaster Pro™
- Ad Lib™
- Microsoft^® Windows™ Sound System™
• Microsoft® PC-97 compliant
• Built-in high-quality 22 voice, 52 operator, OPTiFM™
music synthesizer with enhanced bass
• Built-in 7-channel mixer: five stereo, two mono
• Built-in 16-bit sigma-delta stereo codec
• ISA Plug and Play Specification 1.0a compatible, supports
a maximum of six logical devices:
- Sound Blaster Pro, Windows Sound System,
FM synthesis
- MPU-401 MIDI interface
- CD-ROM interface
- Joystick/game port
- Modem interface
- 82C931 control
• Supports external serial EEPROM (optional)
• External modem chipset interface
• Full duplex operation: record and playback simultaneously
using two 8- or 16-bit DMA channels
• Supports IMA ADPCM, µ-law, A-law decompression
• 8- or 16-bit stereo sound data up to 48KHz stereo
• Supports 16-bit Type F DMA playback, accelerates tele-
phony-audio applications
• Digital joystick interface support, improves responsiveness
(Microsoft SideWinder™)
• I²S serial interface supports Zoom Video Port, wavetable
controller and modem chipset
• DirectSound™ interface support
• Power-down modes
• Silence mode to turn-off all audio functions
• Hardware and software volume control via push-button
interface
• 100-pin PQFP (Plastic Quad Flat Pack)
• 100-pin TQFP (Thin Quad Flat Pack)
Figure 1-1 System Block Diagram
OPTi
82C931
912-3000-035
Revision: 2.1
Speaker
Line-Out
Line-In
CD Audio
Microphone
IDE CD-ROM Interface
Modem Interface
Joystick Port, MIDI Port
I²S Serial Audio Port
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