DM300022 Microchip Technology, DM300022 Datasheet - Page 16

• Manufacturer Part Number: DM300022
• Description: MODULE PWR DSPICDEM MC1L LV 3PHS
• Manufacturer: Microchip Technology

Specifications of DM300022

• Main Purpose: Power Management, Motor Control
• Embedded: Yes, MCU, 16-Bit
• Utilized Ic / Part: dsPIC33FJxxxMC
• Primary Attributes: 3-Phase Low Voltage Power Module
• Secondary Attributes: Motion Sensor Inputs: Hall Sensors or Optical Encoder
• Silicon Manufacturer: Microchip
• Silicon Core Number: DsPICDEM MC1L
• Kit Application Type: Power Management - Motor Control
• Application Sub Type: 3 Phase Motor
• Silicon Family Name: Piccolo
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

dsPIC30F Acoustic Echo Cancellation Library
The dsPIC30F Acoustic Echo Cancellation (AEC)
Library provides a function to eliminate echoes
generated in the acoustic path between a speaker and
a microphone. This function is useful for speech and
telephony applications in which a speaker and a
microphone are located in close proximity to each
other, and therefore susceptible to signals propagating
from the speaker to the microphone resulting in a
perceptible and distracting echo effect at the far end. It
is especially suitable for these applications:
For hands-free phones intended to be used in compact
environments, such as a car, this library is fully
compliant with the G.167 standard for acoustic echo
cancellation.
Features
DS30177S-page 14
Ordering Information:
SW300060-5K
SW300060-25K
SW300060-100K
AC300030
DS70123
• Hands-free Cell Phone Kits
• Speakerphones
• Intercoms
• Teleconferencing Systems
• Only 2 user functions (“AcousticEchoCancel-
• Full compliance with the Microchip dsPIC30F
• Highly optimized Assembly code, utilizing DSP
• Echo cancellation for 16, 32 or 64 ms echo
Development Systems Ordering Guide
lerInit” and “AcousticEchoCanceller”), both of
which can be called from either a C or Assembly
application program
C30 Compiler, Assembler and Linker simple user
interface – just one library file and one header file
instructions and advanced addressing modes
delays or ‘tail lengths’ (configurable)
dsPIC30F Acoustic Echo Cancellation Library Software License (Up to 5K units)
dsPIC30F Acoustic Echo Cancellation Library Software License (5K to 25K units)
dsPIC30F Acoustic Echo Cancellation Library Software License (25K to 100K units)
Accessory Kit (includes: audio cable, headset, oscillators, microphone, speaker,
M/F RS- 232 cable, DB9M-DB9M Null Modem Adapter)
dsPIC30F Acoustic Echo Cancellation Library Sell Sheet (Available at: www.microchip.com)
• Fully tested for compliance with G.167
• Audio Bandwidth: 0-4 kHz at 8 kHz sampling rate
• Convergence Rate: Up to 43 dB/sec., typically >
• Echo Cancellation: Up to 50 dB, typically > 40 dB
• Can be used together with the Noise Suppres-
• dsPIC30F Acoustic Echo Cancellation Library
• Demo application source code is provided with
• Contact Microchip sales for FREE evaluation
specifications for in-car applications
30 dB/sec.
sion (NS) Library, since the same processing
block size (10 ms) is used
User’s Guide is provided to help the user
understand and use the library
the library. Accessory kit available for purchase
includes: an audio cable, headset, oscillators,
microphone, speaker, DB9 M/F RS-232 cable
and DB9M-DB9M Null Modem Adapter and can
be used for library evaluation
samples
Far End
Speech
Near End
Speech
FAR END
User Application
Acoustic Echo
Receive Path
Cancellation
Send Path
Adaptive
Filter
∑
 2004 Microchip Technology Inc.
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+
Near End
Speech
NEAR END
Far End
Speech
Echo