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BELASIGNA200 Datasheet(PDF) 2 Page - ON Semiconductor

Part # BELASIGNA200
Description  DSP
Download  43 Pages
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

BELASIGNA200 Datasheet(HTML) 2 Page - ON Semiconductor

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BelaSigna 200
2.0 Key Features
2.1 System
• 16-bit programmable fixed-point DSP core
• Configurable WOLA filterbank coprocessor optimized for filterbank calculations
• 12-Kword program memory (PRAM)
• Two 4-Kword data memories (XRAM and YRAM)
• Two 384-word dual-port FIFO memories
• Two 128-word dual-port 18-bit memories dedicated to WOLA output results
• 576-word memory dedicated to WOLA gain values, WOLA windows and other configuration data
• Internal oscillator
• Operating voltage of 1.8V nominal
• Ultra-low power: less than 1mW @ 1.28MHz system clock frequency, 1.8V nominal operating voltage, both processors running
• Available in a QFN package; other packages available upon request
2.2 RCore DSP
• Dual-Harvard architecture, 16-bit programmable fixed-point DSP with three execution units
• Single-cycle multiply-accumulate (MAC) with 40-bit accumulator
• Highly parallel instruction set with powerful addressing modes
• Flexible address generation (including modulo addressing) for accessing program memory and data memories, plus control and
configuration registers
• Separate system and user stacks with dedicated stack pointers
• Fast normalization and de-normalization operations optimized for signal level calculation and block-floating point calculations
• Supports time-domain pre- and post-processing of input data stream and frequency-domain processing of WOLA output
• Master processor for entire system
2.3 WOLA Filterbank Coprocessor
• Mono and stereo time-frequency transforms providing real or complex data results
• Standard library of overlap-add (OLA) and WOLA filterbank configurations
o
Configurable number of frequency bands
o
Configurable number of frequency bands
o
Configurable oversampling and decimation factors
o
Configurable windows
• Low group delay (< 4ms for 16 bands possible)
• Fast real and complex gain application for magnitude and phase processing
• Block floating-point calculations (4-bit exponent, 18-bit mantissa) to achieve high fidelity
• Maximum digital gain of 90dB possible
• High-fidelity time-frequency domain processing
• Low-overhead interaction with the RCore through shared memories, control registers and interrupts
2.4 Input Output Processor (IOP)
• Block-based DMA for all audio data provides automatic management of input and output FIFOs that reduces processor overhead
• Mono (one in, one out), simple stereo (two in, one out), full stereo (two in, two out) and digital mixed (two in, one out) operating
modes
• Interacts with the RCore through interrupts and shared memories
• Normal and smart FIFO audio data accessing schemes available
Rev. 16 | Page 2 of 43 | www.onsemi.com


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