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PDF 82C931 Data sheet ( Hoja de datos )
| Número de pieza | 82C931 | |
| Descripción | Plug and Play Integrated Audio Controller | |
| Fabricantes | OPTi | |
| Logotipo |  |
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OPTi
®
82C931
Plug and Play
Integrated Audio Controller
Data Book
912-3000-035
Revision: 2.1
August 1, 1997
1 page  
List of Figures
82C931
Figure 1-1
Figure 2-1
Figure 2-2
Figure 3-1
Figure 3-2
Figure 4-1
Figure 4-2
Figure 4-3
Figure 4-4
Figure 4-5
Figure 6-1
Figure 6-2
Figure 6-3
Figure 6-4
Figure 6-5
Figure 7-1
Figure 7-2
System Block Diagram .................................................................................................................... 1
Functional Block Diagram................................................................................................................ 3
Data Flow Block Diagram ................................................................................................................ 4
931-MB Mode PQFP Pin Diagram.................................................................................................. 6
931-AD Mode PQFP Pin Diagram .................................................................................................12
Functional Block Diagram..............................................................................................................20
Mixer Block Diagram .....................................................................................................................21
I2S Format .....................................................................................................................................25
General Purpose Serial Port, Timing Relationships ......................................................................26
Format of Input Signals .................................................................................................................27
RESET and CLK Timing Waveform...............................................................................................50
CD-ROM I/O Read Cycle...............................................................................................................51
CD-ROM I/O Write Cycle...............................................................................................................51
DMA Write/Playback Cycle............................................................................................................52
DMA Read/Capture Cycle .............................................................................................................52
100-pin PQFP, Plastic Quad Flat Pack .........................................................................................53
100-pin TQFP, Thin Quad Flat Package .......................................................................................54
912-3000-035
Revision: 2.1
OPTi
®
Page v
5 Page 
82C931
2.0 Overview
The OPTi 82C931 is a single-chip Plug-and-Play audio sys-
tem controller and codec that provides compatibility with
Sound Blaster Pro™, Microsoft Windows Sound System™,
OPL3, and MPU-401 interfaces. The 82C931 integrates a 16-
bit stereo sigma-delta codec and PC-97 compliant internal
resource structure. This provides an effective audio solution
for Windows 95 operating systems, DirectSound™, and
advanced audio applications.
The 82C931 provides front panel push-button volume control,
external modem chip interface, serial EEPROM for further
customizing, support for 16-bit Type F DMA playback and an
I2S serial interface to a Zoom Video Port, wavetable control-
ler, or modem chipset.
The 82C931 includes the following functions: ISA bus inter-
face, Sound Blaster Pro-compatible Digital Audio Processor,
MIDI interface, Windows Sound System interface, FM syn-
thesizer interface, 16-bit codec/mixer, game port timer, and
IDE CD-ROM interface. The device also includes dual DMA
channels that support full duplex operation for simultaneous
record and playback, a silence mode, power-down modes,
and software programmable interrupts. (Figure 2-1 shows a
functional block diagram of the 82C931. Figure 2-2 shows the
82C931 data flow block diagram.)
The 82C931 Integrated Audio Controller provides all of the
functions and interfaces for Sound Blaster Pro-compatible
and Microsoft Windows Sound System-compatible cards.
The 82C931 is intended to provide an integrated audio solu-
tion for business audio, educational/entertainment sound,
and multimedia applications.
Figure 2-1 Functional Block Diagram
IOW#
IOR#
AEN
RESET
OSCI
SA[15:0]
SD[15:0] or SD[7:0]
SDHOE+GPIO0
DACK0#/1#/3#
DACK5#/6#
DRQ0/1/3
IRQ3/4/5/7/9/10/11/15
GD[7:0]
OSCI
OSCO
MICL/R
AUXL/R
CDL/R
LINEL/R
OUTL/R
MIXOUTL/R
VOLUP
VOLDWN
SADI
SADO
SCLK
FSYNC
ISA
Control
CLK
GEN
WSS CONF
REGS REGS
Digital
Audio
Processor
8/16-bit Type
DMA Logic
Interrupt
Game Port Timer
16-bit Sigma-Delta
Codec/Mixer
Volume Control
I2S Serial Audio Port
FIFO
MIDI
FIFO
UART
OPTiFM
CD-ROM
Interface
Modem Interface
RXD
TXD
CA[2:0]
IDECS1#
IDECS3#
CDOE#
CDHOE#
XIOR#
XIOW#
RESET#
IDEIRQ
MODEMINT
MODEMCS#
912-3000-035
Revision: 2.1
OPTi
®
Page 3
11 Page | ||
| Páginas | Total 64 Páginas | |
| PDF Descargar | [ Datasheet 82C931.PDF ] | |
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