DSPIC33FJ12GP202-I/SP Microchip Technology, DSPIC33FJ12GP202-I/SP Datasheet - Page 57

• Manufacturer Part Number: DSPIC33FJ12GP202-I/SP
• Description: IC, DSC, 16BIT, 12KB, 40MHZ, 3.6V, DIP28
• Manufacturer: Microchip Technology
• Series: DsPIC33FJr

Specifications of DSPIC33FJ12GP202-I/SP

• Core Frequency: 40MHz
• Core Supply Voltage: 2.75V
• Embedded Interface Type: I2C, SPI, UART
• No. Of I/o's: 21
• Flash Memory Size: 12KB
• Supply Voltage Range: 3V To 3.6V
• Core Processor: dsPIC
• Core Size: 16-Bit
• Speed: 40 MIPs
• Connectivity: I²C, IrDA, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 21
• Program Memory Size: 12KB (12K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 10x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-DIP (0.300", 7.62mm)
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AC164337 - MODULE SOCKET FOR PM3 40DIPDM240001 - BOARD DEMO PIC24/DSPIC33/PIC32
• Eeprom Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

11.13 Speech Encoding/Decoding
The Speech Encoding/Decoding Library performs toll-
quality voice compression and voice decompression.
The library is based on a modified version of the Speex
speech encoder/decoder source code and features a
16:1 compression ratio. It samples speech at 8 kHz and
compresses it to a data rate of 8 kbps. Storing
compressed
approximately 1 KB of memory for each second of
speech. The library is especially suitable for the
following voice-based applications:
• Answering Machines
• Building and Home Safety Systems
• Intercoms
• Smart Appliances
• Voice Recorders
• Walkie-Talkies
• Any Application using Message Playback
A PC-based speech encoder utility program allows you
to create your own encoded speech files for playback.
Encoded speech files are made from either a PC
microphone or existing WAV file. Once you create the
encoded speech files, they are added to your MPLAB
C30 project, just like a regular source file, and built into
your application. The speech encoder utility allows you to
select four target memory areas to store your speech file:
program Flash memory, RAM and external Flash
memory. External Flash memory allows you to store
many minutes of speech (1 minute of speech requires
60 KB) and it is supported through a general purpose I/O
port.
© 2005 Microchip Technology Inc.
Library
speech
for
playback
requires
Preliminary
Key features of the Speech Encoding/Decoding Library
include:
• PESQ-based Mean Opinion Score: 3.7-4.2
• Code Excited Linear Prediction (CELP) based
• 2 Analog Input Interfaces – codec or on-chip ADC
• 2 Analog Output Interfaces – codec or
• Optional Voice Activity Detection
• Storing compressed speech requires 1 KB of
• Royalty-free (only one-time license fee)
• Full compliance with Microchip MPLAB C30
• “dsPIC30F Speech Encoding/Decoding Library
• Designed to run on dsPICDEM 1.1 General
(out of 5.0)
coding
on-chip PWM
memory per second of speech
C Compiler Language Tools
User’s Guide”
Purpose Development Board (DM300014)
dsPIC33F
DS70155C-page 55