Knowles builds a 4-core DSP to add ‘smarts’ to MEMS microphones
Describing it as the world’s first
context-aware, machine learning
optimized audio processor,
Knowles has unveiled the IA8508,
a multi-core, high-performance,
ultra-low power audio processing
platform optimized for mobile,
ear-worn and IoT products with
Open DSP flexibility and a host of
The IA8508 audio processor is
a combination of four individual
cores, eight PDM (pulse density
modulation) microphone interfaces,
and 5.7 MB of memory.
Three heterogeneous Tensilica
based, audio-centric DSP
cores and an ARM Cortex M4
maximize design flexibility. The
DSP cores deliver low latency,
high capacity processing for audio
and machine learning computations,
while the Cortex M4
blends signal processing with
general-purpose controller capability.
The IA8508 processes up
to eight digital PDM microphones
and connects with up to 6x bidirectional
links and a stereo PDM output.
Processor interfaces include SPI,
I2C, UART, and GPIOs. IA8508
is available in three package options
BGA, QFN and CSP.
All four cores
of RAM. The
into an ultra-low
is guaranteed by a single sample
processor (SSP) core for real-time
processing for audio applications
such as ANC (active noise cancellation)
or asynchronous sample
rate conversions of various audio
sources. Audio algorithms are
optimized with instruction sets
that feature high capacity 4-way
SIMD floating point processing.
Lightweight floating-point representation
built into the architecture
maintains audio signal fidelity
while remaining in low power.
Deep Neural Network (DNN) hardware
acceleration is optimized
with an instruction set that features
high capacity 16-way SIMD
for machine learning.
Microchip’s SPICE/SIMPLIS free analogue simulator extends device coverage
MPLAB Mindi analogue
simulation software, has been
updated to include more models
and features; the circuit simulation
tool now supports more than 300
Microchip analogue products.
Mindi supports SIMetrix’s enhanced
SPICE (Simulation Program
with Integrated Circuit
Emphasis) and SIMPLIS Technologies’
SIMPLIS (SIMulation of
Piecewise LInear Systems) simulation
environments. The updated
Mindi analog simulation software
is available as a free download.
12 DesignNews NOVEMBER 2017 www.eedesignnewseurope.com