AD1812 Datasheet, PDF (1/20 Pages) Analog Devices – SoundPort Controller

a
SoundPort Controller
AD1812
FEATURES
Compatibility with:
Sound Blaster Pro*
AdLib*
Windows* Sound System
16-Bit ⌺⌬ Stereo Codec
MPC Level-2+ Mixer
Dual DMA/Full Duplex Operation
On-Chip FIFO Buffers
Sample Rates from 5.5 kHz to 50 kHz
ADPCM Compression/Decompression
Plug and Play Compliant
Compatible MIDI MPU-401 Port
Integrated Game Port
Free Supporting Software:
Windows 3.1 Driver
Windows 95 Driver
Control Applets
Diagnostics
Power Management Modes
Operation from +5 V Supply
16-Bit Parallel Interface to ISA Bus
24 mA Bus Drive Capability
*Sound Blaster Pro is a trademark of Creative Labs, Ltd.
*AdLib is a trademark of AdLib Multimedia.
*Windows is a trademark and Microsoft is a registered trademark of
*Microsoft Corp.
SoundPort is a registered trademark of Analog Devices, Inc.
PRODUCT OVERVIEW
The AD1812 SoundPort® Controller is a single chip audio sub-
system for adding 16-bit stereo audio to personal computers.
The AD1812 is compatible with Sound Blaster Pro, AdLib, and
the Microsoft* Windows Sound System. The AD1812 provides
an integrated audio solution for enhanced business audio, enter-
tainment sound effects, and multimedia applications.
The AD1812 audio subsystem combines an integrated digital
audio controller, a powerful signal processor, a mixer, and a
16-bit Σ∆ stereo codec. The DOS games register set, the Win-
dows Sound System register set, music synthesis hardware, an
MPU-401 compatible UART interface, a game port (with
timer), and a Plug and Play ISA interface are all contained on
chip. The on-chip Plug and Play (PnP) routine provides con-
figuration services for the internal logical devices and an exter-
nal modem chipset.
The AD1812 can record compress and playback voice, sound
and music. The system provides all PC 95 audio conversion and
compatibility requirements for a multimedia enabled PC.
(continued on Page 12)
FUNCTIONAL BLOCK DIAGRAM
XTALI / O
A_1 B_1 A_X B_X A_2 B_2 A_Y B_Y MIDI _IN MIDI _OUT
M IC
LINE
AUX1
L_OUT
MONO I/O
R_OUT
MONO_IN
AUX2
DACIN
DACOUT
AD1812
0dB/
20dB
OSCILLATORS
JOYSTICK/GAME PORT INTERFACE
MPU-401 UART
MΣ
PGA
Σ ∆ A/D
CONVERTER
FORMAT FIFO
GGG
MMM
ΣΣΣ
ΣΣΣ
GG
MM
DIGITAL MIX
ATTENUATE
ATTN/
MUTE
Σ ∆ D/A
CONVERTER
Σ
Σ
FORMAT
FIFO
G = GAIN/AMPLIFIER BLOCK
M = MUTE BLOCK
ROM
RAM
GAME
REGISTER
SET
&
WSS
REGISTER
SET
ATTN
Σ ∆ D/A
CONVERTER
ADSP-2171
PARALLEL
BUS
INTERFACE
CONTROL
REGISTERS
PLUG
AND
PLAY
REGISTERS
MODEM_IRQ
MODEM_SEL
DRQ (0, 1, 3, 5, 6, 7)
IRQ (3, 4, 5, 7, 9, 10, 11, 12)
PC_D (15:0)
PC_A (15:0)
AEN
DACK (0, 1, 3, 5, 6, 7)
IOR
IOW
SBHE
IO_CH16
PWRDWN
PnP
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
© Analog Devices, Inc., 1996
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone]
Fax: [phone]