Rainbow Electronics ISD1700 User Manual

PRELIMINARY

ISD1700

Series

Multi-Message

Single-Chip

Voice Record & Playback Devices

Publication Release Date: January 23, 2007 Revision 1.3-S2

ISD1700 SERIES

TABLE OF CONTENTS

1 GENERAL DESCRIPTION ..............................................................................................................3

2 FEATURES......................................................................................................................................4

3 BLOCK DIAGRAM...........................................................................................................................5

4 PINOUT CONFIGURATION............................................................................................................6

5 PIN DESCRIPTION .........................................................................................................................7

6 MODES OF OPERATIONS.............................................................................................................8

6.1 Standalone (Push-Button) Mode .............................................................................................8

6.2 SPI Mode .................................................................................................................................8

7 TIMING DIAGRAMS ........................................................................................................................8

7.1 Standalone Operation ..............................................................................................................8

7.2 SPI Operation.........................................................................................................................12

8 ABSOLUTE MAXIMUM RATINGS ................................................................................................13

8.1 Operating Conditions .............................................................................................................13

9 ELECTRICAL CHARACTERISTICS .............................................................................................14

9.1 DC Parameters ......................................................................................................................14

9.2 AC Parameters.......................................................................................................................15

10 TYPICAL APPLICATION CIRCUITS.............................................................................................16

10.1 Good Audio Design Practices................................................................................................18

11 PACKAGING .................................................................................................................................19

11.1 28-Lead 8x13.4mm Plastic Thin Small Outline Package (TSOP) Type 1 - IQC....................19

11.2 28-Lead 300-Mil Plastic Small Outline Integrated Circuit (SOIC)..........................................20

11.3 28-Lead 600-Mil Plastic Dual Inline Package (PDIP) ............................................................21

11.4 Die Information.......................................................................................................................21

12 ORDERING INFORMATION .........................................................................................................22

13 VERSION HISTORY......................................................................................................................23

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ISD1700 SERIES

1 GENERAL DESCRIPTION

The Winbond® ISD1700 ChipCorder® Series is a high quality, fully integrated, single-chip multimessage 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, antialiasing 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 Winbond’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 8Ω 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 Winbond Sales Offices or Representatives to verify current or future specifications. Also refer to the website for any related application notes.

Publication Release Date: January 23, 2007

- 3 - Revision 1.3-S2

ISD1700 SERIES

2 FEATURES

y Integrated message management systems for single-chip, push-button applications

REC : level-trigger for recording

o o o o o

o o Automatic power-down after each operation cycle

y Selectable sampling frequency controlled by an external oscillator resistor

duration

o A wide range selection from 20 secs to 480 secs pending upon sampling frequency chosen

Sample Freq. ISD1730 ISD1740 ISD1750 ISD1760 ISD1790 ISD17120 ISD17150 ISD17180 ISD17210 ISD17240

y 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

y Dual operating modes

o Standalone mode:

o SPI mode:

y 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

y Dual output channels

o Differential PWM Class D speaker outputs directly drives an 8  speaker or a typical buzzer o Configurable AUD (current) or AUX (voltage) single-ended output drives external audio amplifier

y 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)

o 100,000 record cycles (typical)

: edge-trigger for individual message or level-trigger for looping playback sequentially

PLA

ERASE

FWD

VOL : 8 levels output volume control

RESET : return to the default state

Sampling Frequency 12 kHz 8 kHz 6.4 kHz 5.3 kHz 4 kHz Rosc

: edge-triggered erase for first or last message or level-triggered erase for all messages

: edge-trigger to advance to the next message or fast message scan during the playback

: ready or busy status indication

INTRDY

53 kΩ 80 kΩ 100 kΩ 120 kΩ 160 kΩ

Selectable message

12 kHz 8 kHz

6.4 kHz

5.3 kHz 4 kHz

20 secs

30 secs

37 secs

45 secs

60 secs

26 secs 33 secs 40 secs 60 secs 80 secs 100 secs 120 secs 140 secs 160 secs

40 secs 50 secs 60 secs 90 secs 120 secs 150 secs 180 secs 210 secs 240 secs

50 secs 62 secs 75 secs 112 secs 150 secs 187 secs 225 secs 262 secs 300 secs

60 secs 75 secs 90 secs 135 secs 181 secs 226 secs 271 secs 317 secs 362 secs

80 secs 100 secs 120 secs 180 secs 240 secs 300 secs 360 secs 420 secs 480 secs

 Integrated message management techniques  Automatic power-down after each operation cycle

 Fully user selectable and controllable options via APC register and various SPI commands

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y Temperature options:

o Commercial: 0°C to +50°C (die); 0°C to +70°C (packaged units) o Industrial: -40°C to +85°C (packaged units)

y Packaging types: available in die, PDIP, SOIC and TSOP

y Package option: Lead-free packaged units

3 BLOCK DIAGRAM

ISD1700 SERIES

OSC

AnaIn

MIC+ MIC-

AGC

Internal

Clock

AnaIn

Amp

AGC Amp

Power Conditioning

SSA

CCA

MUX

Automatic

Gain Control

SSP1

CCP

Aliasing

SSP2

Anti-

Filter

SSD

Timing

CCD

Sampling

Clock

Nonvolatile

Multi-Level Storage

Array

Device Control

FWD VOL LEDINT/RDYRESET

Smoothing

Filter

Volume Control

Amp

SPI Interface

AUD / AUX

SP+

SP-

MISOMOSISCLKSSREC PLAY ERASE

Publication Release Date: January 23, 2007

- 5 - Revision 1.3-S2

ISD1700 SERIES

4 PINOUT CONFIGURATION

Refer to Design Guide for details before performing any design or PCB layout.

AnaIn

MIC+

MIC-

SSP2

SP-

CCP

Sp+

AUD/AUX

AGC

VOL R V

SSA

SSP1

OSC CCA

CCD

LED

RESET

MISO MOSI

SCLK

SSA

AnaIn

MIC+

MIC-

SSP2

SP-

CCP

ISD1700

SOIC / PDIP

ISD 1 7 0 0

SSD

INT / RD Y FWD ERASE

REC

PLAY

CCA

OSC

VOL AGC

AUD / AUX

SSP1

Sp+

SS SCLK MOSI MISO RESET LED V

CCD

SSD

INT / RDY

FWD

ERASE

REC PLAY FT

TSOP

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ISD1700 SERIES

5 PIN DESCRIPTION

Refer to Design Guide for details before performing any design or PCB layout.

PIN NAME FUNCTIONS

CCD

LED

RESET

MISO

MOSI

SCLK

SSA

AnaIn

MIC+

MIC-

SSP2

SP-

CCP

SP+

SSP1

AUD/AUX

AGC

VOL

OSC

CCA

PLAY

REC

ERASE

FWD

INTRDY

Digital Power Supply: Power supply for digital circuitry. LED: An LED output.

RESET: When active, the device enters into a known state. Master In Slave Out: Data is shifted out on the falling edge of SCLK.

When the SPI is inactive (

SS = high), it’s tri-state.

Master Out Slave In: Data input of the SPI interface when ISD1700 is a

slave. Data is latched into the device on the rising edge of SCLK.

Serial Clock: Clock of the SPI interface. Slave Select: Selects as a slave device and enables the SPI interface.

Analog Ground: Ground path for analog circuitry. AnaIn: Auxiliary analog input to the device for recording or feed-through. MIC+: Non-inverting input of the differential microphone signal. MIC-: Inverting input of the differential microphone signal. Ground: Ground path for negative PWM speaker drive.

SP-: The negative Class D PWM speaker output. Power Supply for PWM Speaker Driver: Power for PWM speaker drive.

SP+: The positive Class D PWM speaker output. Ground: Ground path for positive PWM speaker drive.

Auxiliary Output: Either an AUD (current) or AUX (voltage) output. Automatic Gain Control (AGC): The AGC adjusts the gain of the

microphone preamplifier circuitry.

Volume: This control has 8 levels of volume adjustment. Oscillator Resistor: A resistor determines the sample frequency of the

device, which sets the duration.

Analog Power Supply. Power supply for analog circuitry. Feed-through: Enable the feed-through path for AnaIn signal to the

outputs.

Playback: Plays the recorded message individually, or plays messages

sequential in a looping mode.

Record: When active, starts recording message. Erase: When active, can erase individual message or do global erase. Forward: Advances to the next message from the current location.

An open drain output. Can review ready or interrupt status.

SSD

Digital Ground: Ground path for digital circuitry

Publication Release Date: January 23, 2007

- 7 - Revision 1.3-S2

ISD1700 SERIES

6 MODES OF OPERATIONS

The ISD1700 Series can operate in either Standalone (Push-Button) or microcontroller (SPI) mode.

6.1 STANDALONE (PUSH-BUTTON) MODE

One can utilize the

REC, PLA

, FT,

FWD

ERASE

VOL

RESET

control to initiate a

desired operation. As completed, the device automatically enters into the power-down state.

6.2 SPI MODE

In SPI mode, control of the device is achieved through the 4-wire serial interface via SPI commands.

For technical details, please refer to the design guide.

7 TIMING DIAGRAMS

The following estimated timing diagrams are not in proper scale.

ASIC OPERATION

7.1 B

REC

RDY

Deb

LED

Mic+/-,

AnaIn

Sc1

Set1

Figure 12.1: Record Operation with No Sound Effect

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