The Nuvoton® ISD1700 ChipCorder® Series is a high quality, fully integrated, singlechip multi-message voice record and playback device ideally suited to a variety ofelectronic systems. The message duration is user selectable in ranges from 26 secondsto 120 seconds, depending on the specific device. The sampling frequency of eachdevice can also be adjusted from 4 kHz to 12 kHz with an external resistor, giving theuser greater flexibility in duration versus recording quality for each application.Operating voltage spans a range from 2.4 V to 5.5 V to ensure that the ISD1700 devicesare optimized for a wide range of battery or line-powered applications.
The ISD1700 is designed for operation in either standalone or microcontroller (SPI)mode. The device incorporates a proprietary message management system that allowsthe chip to self-manage address locations for multiple messages. This unique featureprovides sophisticated messaging flexibility in a simple push-button environment. Thedevices include an on-chip oscillator (with external resistor control), microphonepreamplifier with Automatic Gain Control (AGC), an auxiliary analog input, anti-aliasingfilter, Multi-Level Storage (MLS) array, smoothing filter, volume control, Pulse WidthModulation (PWM) Class D speaker driver, and current/voltage output.
The ISD1700 devices also support an optional “vAlert” (voiceAlert) feature that can beused as a new message indicator. With vAlert, the device flashes an external LED toindicate that a new message is present. Besides, four special sound effects arereserved for audio confirmation of operations, such as “Start Record”, “Stop Record”,“Erase”, “Forward”, “Global Erase”, and etc.
Recordings are stored into on-chip Flash memory, providing zero-power messagestorage. This unique single-chip solution is made possible through Nuvoton’s patentedMulti-Level Storage (MLS) technology. Audio data are stored directly in solid-statememory without digital compression, providing superior quality voice and musicreproduction.
Voice signals can be fed into the chip through two independent paths: a differentialmicrophone input and a single-ended analog input. For outputs, the ISD1700 providesa Pulse Width Modulation (PWM) Class D speaker driver and a separate analog outputsimultaneously. The PWM can directly drive a standard 8Ω speaker or typical buzzer,while the separate analog output can be configured as a single-ended current or voltageoutput to drive an external amplifier.
While in Standalone mode, the ISD1700 devices automatically enter into power downmode for power conservation after an operation is completed.
In the SPI mode, the user has full control via the serial interface in operating the device.This includes random access to any location inside the memory array by specifying thestart address and end address of operations. SPI mode also allows access to theISD1700Jun 28, 2021 Page 4 of 26 Rev2.3Analog Path Configuration (APC) register. This register allows flexible configuration ofaudio paths, inputs, outputs and mixing. The APC default configuration for standalonemode can also be modified by storing the APC data into a non-volatile register(NVCFG) that is loaded at initialization. Utilizing the capabilities of ISD1700 Series,designers have the control and flexibility to implement voice functionality into the highend products.
The product is in the warehouse and can be shipped immediately
***************************************************************
FOR MORE DETAILS , PLEASE CONTACT US, THANK YOU.
Email:
[email protected]
