Nuvoton Technology: Audio playback IC - Nuvoton Technology -Macnica

Product Summary

Nuvoton Technology's audio playback ICs are low-cost single-chip products with built-in Flash and speaker amplifiers. These audio playback ICs are available in the Nuvoton Sound Processor (NSP) series. Equipped with I2C and UART interfaces for connection to a host MCU, they enable simultaneous two-channel playback. They also feature a built-in speaker amplifier with a maximum output of 3W and an ISP (In-System Programming) function that enables content updates after mass production. Nuvoton offers user-friendly software and hardware development tools to quickly and easily implement audio playback functionality.

Easy writing from WAV files using dedicated tools

Easily burn from WAV files using dedicated tools!

Product features

Operating voltage: 2.0 ~ 5.5V
Operating temperature range: -40℃ ~ +85℃
Interfaces: UART, I2C, One-Wire, Two-Wire
Audio playback time: Maximum 420 seconds (NSP2340A)
Speaker output: Max. 3W
Simultaneous audio playback: 2ch
Low standby power: < 1μA
Flash rewrite count: 100K (10 years)
Package: SOP8, SOP16

NSP PlayList Editor Tool

Using the dedicated software "NSP PlayList Editor Tool", you can easily import audio and assign it to an index number (the maximum index number for NPS2340A is 65535). After that, you can simply write the audio to the IC, and it will receive simple commands from an external MCU to play the specified audio.

The diagram on the right is an example of an I2C connection with the host MCU. This can be achieved simply by sending playback commands and numbers from the host MCU via the serial interface. This also minimizes MCU resource consumption.

Product lineup

Model number	Duration (Sec.)		VDD (V)	Audio Output (8Ω, THD+N < 1%)		package
	12KHz	16KHz		3.3V	5.5V
NSP2080A	96	72	2.0 ~ 5.5	0.2W	0.5W	SOP8 (4.9 x 6 mm)
NSP2170A	177	133
NSP2340A	420	315
NSP2080A01G	96	72		0.4W	1.0W	SOP16 (9.9 x 6 mm)
NSP2170A01G	177	133
NSP2340A01G	420	315
NSP2080A03G	96	72		0.7W	3.0W
NSP2170A03G	177	133
NSP2340A03G	420	315

Demonstration video

Please watch the video to see how audio playback can be easily achieved using an audio playback IC.

Easy audio playback! Audio playback IC NSP series

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ReadSpeaker is software that uses TTS (Text to Speech) speech synthesis technology to convert text (character information) into human voice. It can generate high-quality guide voices without using studio recordings by professional voice actors or announcers. Implementing voice functions is easy. ReadSpeaker allows you to easily create high-quality, natural-sounding voices simply by inputting text.

ReadSpeaker Features

Cutting-edge speech synthesis technology provides natural, natural pronunciation
More than 1,700 companies have adopted the system in Japan alone.
Multilingual support makes it easy to deploy worldwide (supports 44 languages)
10 speakers for Japanese alone, with various speaker types for each language
A wide variety of voices can be generated, including joy, anger, sadness, and happiness.
It is possible to learn the voice of a voice actor specified by the customer and create a unique voice.
Save WAV files and immediately write them to audio playback ICs