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AL3201B Datasheet Preview

AL3201B Datasheet

DRE Digital Reverb Engine

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General Description
The AL3201B Digital Reverb Engine provides
all of the signal processing power required to
implement a compact, easy to use, high
quality reverb solution at an extremely
affordable price. Built-in DRAM eliminates
the need for wide bus connections to
external RAM, while its 16 built-in programs
and user programmable RAM allows instant
usability or custom program design.
Applications
Guitar and Instrument Amps
Digital Mixing Boards
Karaoke Systems
Digital Effects Boxes
Computer Sound Cards
Car Audio Systems
Personal Stereo Products
AL3201B
DRE Digital Reverb Engine
Features
16 internal ROM programs consisting of
halls, rooms, plates, delays, chorus,
flange, vocal cancel, and rotary speaker
emulation.
Serially programmable SRAM for
program development or dynamically
changing programs
128 instructions per wordclock. (6 MIPS
@ 48kHz.)
32k location DRAM provides over 0.68s
of delay at 48kHz sampling frequency.
Internal crystal oscillator circuit
eliminates need for discrete external
passive components.
Internal voltage regulators allow
operation from 5.5V down to 3.0V VDD.
Internal 1000pF bypass capacitor to
reduce voltage swings at the rails.
Program List and Package
Prog[3:0]
0110
0010
1010
1110
1111
1011
1001
1101
1100
1000
0000
0100
0101
0001
0011
0111
Name
Hall 1
Hall 2
Room 1
Room 2
Room 3
Plate 1
Plate 2
Plate 3
Chorus
Flange
Delay 1
Delay 2
Chorus/Room 1
Chorus/Room 2
Vocal Cancel
Rotary Speaker
Description
Bright hall reverb for drums, guitars, and vocals.
Warm hall for acoustic guitars, pianos, and vocals.
Hardwood studio for acoustic instruments.
Ambience for acoustic mixes and synth sounds.
Warm room for guitars and rhythm instruments.
Classic plate reverb for lead vocals and instruments.
Sizzling bright plate reverb for vocals and drums.
Short vintage plate reverb for snares and guitars.
Stereo chorus for guitars and pianos.
Stereo flanger for jet wash effects.
125ms slapback delay for vocals and guitars.
190ms delay for percussive arpeggios.
Chorus with reverb for guitars, synths, and pianos.
Auto-wah guitar effect with reverb for lead instruments.
Removes lead vocals from many stereo recordings.
Rotary speaker emulation for organs and guitars.
Note: The unusual ordering of the programs allows a 16-position rotary switch’s Gray
code output to be connected to the program pins.
DigOut
Int/Ext
XtalIn
XtalOut
Prog0/SData
Prog1/SClk
Prog2
Prog3
16 pin SOIC
300 mils wide
DigIn
VDD
Bypass
Gnd
Reset
SysClk
BitClk
WordClk
Wavefront Semiconductor 200 Scenic View Drive Cumberland, RI 02864 U.S.A.
Tel: +1 401 658-3670 Fax: +1 401 658-3680 Email: info@wavefrontsemi.com
On the web at www.wavefrontsemi.com
1
AL3201B-0305




Wavefront

AL3201B Datasheet Preview

AL3201B Datasheet

DRE Digital Reverb Engine

No Preview Available !

Table of Contents
General Description ………………………………………………………………… 1
Features …………………………………………………………..……………………. 1
Applications ……………………………………….........................……………… 1
Program List and Package ….............................…………………………….. 1
Table of Contents ………………..……………………………………….…………. 2
Pin Descriptions ……………………………………………………………………... 3
Electrical Characteristics ……………………………………………………….… 3
Architecture Overview …………………………………………………………….. 4
Architecture Block Diagram …………………………………………….… 4
Architecture Details ……………………………………………………………….. 5
DigIn/ DigOut Interface ................……………………..…………….... 5
DigIn/ DigOut Format Timing .....……………..…………….... 5
Instruction RAM ……………………………………..…......................... 5
Instruction RAM Memory Map ……………………….………… 5
LFO Coefficient Word ..............……………………….………… 6
MAC Instruction Word .............……………………….………… 7
Program ROM ………....……………………………..…......................... 8
Program List …...........................…………………….………… 8
Data RAM …….……………………………………………………………..... 8
Multiply/Accumulate Unit ………......…………………………............. 9
Reset Unit ......................………………………………………………….. 9
Clock Generator ……….............………………………………………….. 9
Serial Microprocessor Interface ……………………...…………………...10
Format and Access Timing …............................................ 10
Memory Map .....………………...........………………………….. 10
The 4 Word Formats .....………………...........………………… 10
Control/Status Word 0 ……...………...........…….…………….11
Control/Status Word 1 ……...………...........…….…………….11
Suggested Connections ………………………………………….…………....….. 12
Package Dimensions ………………………………………….……………...……..12
Notice and Contact Information …………………………………………………13
www.wavefrontsemi.com
2


Part Number AL3201B
Description DRE Digital Reverb Engine
Maker Wavefront
Total Page 13 Pages
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