Alesis AL3201 Manual

General Description

The AL3201 (SCR, or Single Chip Reverb)
is a one chip reverb solution that is
compact, easy to use, and yet quite
powerful. Built-in DRAM eliminates the
need for wide bus connections to external
RAM, and the choice of built-in programs
and a user programmable RAM allows
instant usability or
design.
Personal stereos with reverb functions.
Extremely portable guitar effects boxes.
Karaoke machines utilizing the vocal cancel program.
Hardware reverb effects for computer sound cards.
Ambience settings for car stereos.
Int/Ext
XtalOut
Prog0/SData
Prog1/SClk
DS3201-0802
Phone (310) 301-0780
custom program
Applications
DigOut
XtalIn
Prog2
Prog3
16 pin SOIC
300 mils wide
Alesis Semiconductor
12555 Jefferson Blvd., Suite 285
Los Angeles, CA 90066
Fax (310) 306-1551 www.alesis-semi.com
We make the parts that set creative people free
Features
16 internal ROM programs consisting
of halls, rooms, plates, delays, chorus,
flange, vocal cancel,
speaker emulation.
Serially programmable SRAM (Writable
Control Store – WCS) for program
development or dynamically changing
programs
Programs run at 128 instructions per
word clock. (6 MIPS @ 48kHz sam-
pling frequency.)
32k location DRAM provides over 0.68s
of delay at 48kHz sampling frequency.
Internal crystal
eliminates need for discrete external
passive components.
Internal voltage regulators allow opera-
tion at both 5V and 3.3V V
Internal 1000pF bypass capacitor to
reduce voltage swings at the rails.
DigIn
V
DD
Bypass
Gnd
Reset
SysClk
BitClk
WordClk

and rotary
oscillator circuit
.
DD