Sound Blaster Pro*
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
Plug and Play Compliant
Compatible MIDI MPU-401 Port
Integrated Game Port
Free Supporting Software:
Windows 3.1 Driver
Windows 95 Driver
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
SoundPort is a registered trademark of Analog Devices, Inc.
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
JOYSTICK/GAME PORT INTERFACE
Σ ∆ A/D
Σ ∆ D/A
G = GAIN/AMPLIFIER BLOCK
M = MUTE BLOCK
Σ ∆ D/A
DRQ (0, 1, 3, 5, 6, 7)
IRQ (3, 4, 5, 7, 9, 10, 11, 12)
DACK (0, 1, 3, 5, 6, 7)
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.