Syntiant  Always-On Speech & Audio

Recognition Processors



NDP101 Neural Decision Processor™

The Syntiant  NDP architecture is built from the ground up to run deep learning algorithms.  The NDP101 achieves breakthrough performance by highly coupled computation and memory, exploiting the vast inherent parallelism of deep learning and computing at only required numerical precision. The devices combine these elements to achieve approximately 100x efficiency improvement over stored program architectures such as CPUs and DSPs.

Ultra-Low-Power Consumption

Micro-watt level active power consumption, while always-on and listening


Keyword Speech Interface

Created from the simultaneous classification of dozens of keywords


Programmable general purpose IO, SPI Master and ability to boot from a serial flash enabling the NDP100 to be the only processor in the system

Ease of Use

Multiple, flexible methods to access neural processing engine where the user has full customization of applications and post-processing

Neural Processing

Neural network with over half a million parameters providing large scale parallelism for sensor-based applications


The NDP101 enables speech interfaces in the smallest systems and supports entirely new form factors and usage models designed to wake up to speech rather than touch.

mobile phones • IoT endpoints • smart home • remote controls

Key Features

System on chip in a 32 pin QFN package


Suitable for applications that require an MCU for

control and a neural engine for decision making


Dual PDM microphone input or PCM-over-SPI input


Stereo/mono I2S interface multiplexed with PDM


Direct access to neural network over SPI for sensor applications


Frequency, time-domain & batch input models


16-bit input holding tank with faster than real-time SPI extraction


General purpose Arm Cortex-M0 processor 112KB SRAM


Eight GPIO pins with programmable direction and drive strength

Support for external serial flash boot

Integrated clock multiplier and dividers support low frequency clock source or external clocking


Optimized interrupt and SPI slave interface


Master SPI interface for sensor interfaces


Onboard firmware security and authentication


English Speech Service for keyword training


Software Development Kit (SDK) integrates in any software environment


Training Development Kit (TDK) to enable the user of standard frameworks such as TensorFlow for customer-programmed applications


Support for 64 output classifications


Active power consumption of <140 μW while recognizing words

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