ISD1700 DATASHEET
ISD1700
Series
Multi-Message
Single-Chip
Voice Record & Playback Devices
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Publication Release Date:March 3, 2017
Revision 2.1
ISD1700 DATASHEET
TABLE OF CONTENTS
1
2
3
4
5
6
GENERAL DESCRIPTION .............................................................................................................. 3
FEATURES ...................................................................................................................................... 4
BLOCK DIAGRAM ........................................................................................................................... 5
PINOUT CONFIGURATION ............................................................................................................ 6
PIN DESCRIPTION ......................................................................................................................... 7
MODES OF OPERATIONS ............................................................................................................. 8
6.1 Standalone (Push-Button) Mode .............................................................................................. 8
6.2 SPI Mode.................................................................................................................................. 8
7
TIMING DIAGRAMS ........................................................................................................................ 8
7.1 Basic Operation ........................................................................................................................ 8
7.2 SPI Operation ......................................................................................................................... 12
8
9
ABSOLUTE MAXIMUM RATINGS ................................................................................................ 13
8.1 Operating Conditions.............................................................................................................. 13
ELECTRICAL CHARACTERISTICS .............................................................................................. 14
9.1 DC Parameters ...................................................................................................................... 14
9.2 AC Parameters ....................................................................................................................... 15
10
11
TYPICAL APPLICATION CIRCUITS ............................................................................................. 16
10.1 Good Audio Design Practices ................................................................................................ 18
PACKAGING .................................................................................................................................. 19
11.1 28-Lead 300-Mil Plastic Small Outline Integrated Circuit (SOIC) ........................................... 19
11.2 28-Lead 600-Mil Plastic Dual Inline Package (PDIP) ............................................................. 20
12
13
ORDERING INFORMATION ......................................................................................................... 20
VERSION HISTORY ...................................................................................................................... 22
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Publication Release Date:March 3, 2017
Revision 2.1
ISD1700 DATASHEET
1 GENERAL DESCRIPTION
The Nuvoton ISD1700 ChipCorder Series is a high quality, fully integrated, single-chip multi-message
voice record and playback device ideally suited to a variety of electronic systems. The message
duration is user selectable in ranges from 26 seconds to 120 seconds, depending on the specific
device. The sampling frequency of each device can also be adjusted from 4 kHz to 12 kHz with an
external resistor, giving the user 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 devices
are 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 allows the chip to self-manage address
locations for multiple messages. This unique feature provides sophisticated messaging flexibility in a
simple push-button environment. The devices include an on-chip oscillator (with external resistor
control), microphone preamplifier with Automatic Gain Control (AGC), an auxiliary analog input, anti-
aliasing filter, Multi-Level Storage (MLS) array, smoothing filter, volume control, Pulse Width Modulation
(PWM) Class D speaker driver, and current/voltage output.
The ISD1700 devices also support an optional “vAlert” (voiceAlert) feature that can be used as a new
message indicator. With vAlert, the device flashes an external LED to indicate that a new message is
present. Besides, four special sound effects are reserved 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 message storage. This unique
single-chip solution is made possible through Nuvoton’s patented Multi-Level Storage (MLS)
technology. Audio data are stored directly in solid-state memory without digital compression, providing
superior quality voice and music reproduction.
Voice signals can be fed into the chip through two independent paths: a differential microphone input
and a single-ended analog input. For outputs, the ISD1700 provides a Pulse Width Modulation (PWM)
Class D speaker driver and a separate analog output simultaneously. The PWM can directly drive a
standard 8 speaker or typical buzzer, while the separate analog output can be configured as a single-
ended current or voltage output to drive an external amplifier.
While in Standalone mode, the ISD1700 devices automatically enter into power down mode 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 the start address and end
address of operations. SPI mode also allows access to the Analog Path Configuration (APC) register.
This register allows flexible configuration of audio paths, inputs, outputs and mixing. The APC default
configuration for standalone mode 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 high-end products.
Notice: The specifications are subject to change without notice. Please contact Nuvoton Sales Offices or
Representatives to verify current or future specifications. Also refer to the website for any related application
notes.
®
®
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Publication Release Date:March 3, 2017
Revision 2.1
ISD1700 DATASHEET
2 FEATURES
Integrated message management systems for single-chip, push-button applications
o
o
o
o
o
o
REC
:
level-trigger for recording
PLAY
:
edge-trigger for individual message or level-trigger for looping playback sequentially
ERASE
:
edge-triggered erase for first or last message or level-triggered erase for all messages
FWD
:
edge-trigger to advance to the next message or fast message scan during the playback
VOL
: 8 levels output volume control
RDY INT
: ready or busy status indication
o
RESET
: return to the default state
o
Automatic power-down after each operation cycle
Selectable sampling frequency controlled by an external oscillator resistor
Sampling Frequency
Rosc
12 kHz
53 k
8 kHz
80 k
6.4 kHz
100 k
5.3 kHz
120 k
4 kHz
160 k
Selectable message duration
o
A wide range selection from 20 secs to 480 secs pending upon sampling frequency chosen
Sample Freq.
12 kHz
8 kHz
6.4 kHz
5.3 kHz
4 kHz
ISD1730
20 secs
30 secs
37 secs
45 secs
60 secs
ISD1760
40 secs
60 secs
75 secs
90 secs
120 secs
ISD17120
80 secs
120 secs
150 secs
181 secs
240 secs
ISD17240
160 secs
240 secs
300 secs
362 secs
480 secs
Message and operation indicators
o
Four customizable Sound Effects (SEs) for audible indication
o
Optional vAlert (voiceAlert) to indicate the presence of new messages
o
LED: stay on during recording, blink during playback, forward and erase operations
Dual operating modes
o
Standalone mode:
Integrated message management techniques
Automatic power-down after each operation cycle
o
SPI mode:
Fully user selectable and controllable options via APC register and various SPI commands
Two individual input channels
o
MIC+/MIC-: differential microphone inputs with AGC (Automatic Gain Control)
o
AnaIn: single-ended auxiliary analog input for recording or feed-through
Dual output channels
o
Differential PWM Class D speaker outputs directly drives an 8 Ω speaker or a typical buzzer
o
Configurable AUD (current) or AUX (voltage) single-ended output drives external audio amplifier
ChipCorder standard features
o
High-quality, natural voice and audio reproduction
o
2.4V to 5.5V operating voltage
o
100-year message retention (typical)
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Publication Release Date:March 3, 2017
Revision 2.1
ISD1700 DATASHEET
o
100,000 record cycles (typical)
Temperature options:
o
Commercial: 0C to +50C (die); 0C to +70C (packaged units)
o
Industrial: -40C to +85C (packaged units)
Packaging types: available in die, PDIP and SOIC
Package option: Lead-free packaged units
3 BLOCK DIAGRAM
R
OSC
Internal
Clock
Timing
Sampling
Clock
AnaIn
AnaIn
Amp
Anti-
Aliasing
Filter
MUX
Amp
AUD /
AUX
Nonvolatile
Multi-Level Storage
Array
MIC+
MIC-
AGC
Smoothing
Filter
Volume
Control
SP+
Amp
SP-
AGC
Amp
Automatic
Gain Control
Power Conditioning
Device Control
SPI Interface
V
CCA
V
SSA
V
CCP
V
SSP1
V
SSP2
V
SSD
V
CCD
REC PLAY ERASE FWD FT RESET VOL INT/RDY LED
SS SCLK MOSI MISO
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Publication Release Date:March 3, 2017
Revision 2.1
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