Rainbow Electronics ISD14B20 User Manual

ISD14B20

SINGLE-CHIP, MULTIPLE-MESSAGE

VOICE RECORD/PLAYBACK DEVICE

10.6- TO 32-SECONDS DURATION

Publication Release Date: October 9, 2007

- 1 - Revision 0

ISD14B20

TABLE OF CONTENTS

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

2. FEATURES....................................................................................................................................... 3

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

4. PAD DESCRIPTION ......................................................................................................................... 6

5. FUNCTIONAL DESCRIPTION ......................................................................................................... 8

5.1. Address Trigger (

NORM

) Operation ........................................................................................... 8

5.1.1. Record (

5.1.2. Edge-triggered Playback ( PlayE ) Operation ........................................................................ 10

5.1.3. Level- triggered Playback ( PlayL )Operation ........................................................................ 10

5.1.4. Playback (Supersedes Record) Operation .......................................................................... 11

5.1.5. XCLK Feature....................................................................................................................... 12

5.2. Direct Trigger (

5.3. Other Operations...................................................................................................................... 14

5.3.1. Rosc Operation .................................................................................................................... 14

LED

5.3.2.

5.3.3. Feed-Through mode Operation ........................................................................................... 15

5.3.4. Power-On Playback Operation ............................................................................................ 15

5.3.5. Automatic Single Message Playback................................................................................... 15

5.3.6. Power is interrupted Abruptly............................................................................................... 15

6. ABSOLUTE MAXIMUM RATINGS

6.1 Operating Conditions ................................................................................................................... 16

7. ELECTRICAL CHARACTERISTICS............................................................................................... 17

7.1. DC Parameters ........................................................................................................................... 17

7.2. AC Parameters ........................................................................................................................... 18

8. TYPICAL APPLICATION CIRCUIT ................................................................................................ 19

9. PACKAGING................................................................................................................................... 21

9.1 Die Information .......................................................................................................................... 21

10. ORDERING INFORMATION .......................................................................................................... 22

11. VERSION HISTORY....................................................................................................................... 23

REC

) Operation ........................................................................................................ 8

) Operation............................................................................................. 12

MODE

Operation...................................................................................................................... 15

[1]

.............................................................................................. 16

Publication Release Date: October 9, 2007

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ISD14B20

1. GENERAL DESCRIPTION

Winbond’s ISD14B20 ChipCorder® is a new single-chip multiple-message record/playback series with dual operating modes (address trigger and direct trigger) with wide operating voltage ranging from 2.4V to 5.5V. The sampling frequency can be selected from 4 to 12 kHz via an external resistor, which also determines the duration from 10.6 to 32 seconds. The device is designed for mostly standalone applications, and of course, it can be manipulated by a microcontroller, if necessary.

The two operating modes are address trigger and direct trigger. While in address trigger mode, both record and playback operations are manipulated according to the start address and end address specified through the start address and end address pins. However, in direct trigger mode, the device can configure the memory up to as many as eight equal messages, pending upon the fixed message configuration settings. With the record or playback feature being pre-selected, each message can be randomly accessed via its message control pin.

The device has a selectable differential microphone input with AGC feature or single-ended analog input, AnaIn, under feed-through mode. Its differential Class D PWM speaker driver can directly drive a typical speaker or buzzer.

2. FEATURES

The ISD14B20 is a multiple messages record/playback device with two operational modes: address trigger ( ) and direct trigger (

• Supply voltage: 2.4V to 5.5V.

• External resistor, Rosc, selects sampling frequency and duration.

• Mic+/Mic- : differential microphone inputs.

• AGC : automatic gain control for microphone preamp circuit.

•

• When both

• SP+/SP- : Class-D PWM differential speaker drivers.

•

• Automatically power down after each operation cycle.

• Playback takes precedence over the recording operation.

y Temperature option: 0°C to +50°C (die)

y Packaging: die only

NORM

Sampling Frequency 12 kHz 8 kHz 6.4 kHz 5.3 kHz 4 kHz Rosc 53.3 KΩ 80 KΩ 100 KΩ 120 KΩ 160 KΩ

: feed-through the AnaIn signal to the speaker outputs while AnaIn is converted from MIC+.

and recording are active, device will record AnaIn signal into memory with AnaIn

signal output to speaker simultaneously.

LED

: during recording, LED is on.

). The analog inputs and the outputs are:

MODE

Publication Release Date: October 9, 2007

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2.1. Address trigger operational mode

ISD14B20

• While in mode, flexible message duration is defined by start address and end

NORM

address.

Utilize four start addresses ( , , & ) and four end addresses ( , , & ) to

•

S0 S1 S2 S3 E0 E1 E2 E3

specific the message duration.

REC

•

: Level-hold or Edge-trigger (toggle on-off) recording from start to end addresses.

PLAYE

: Edge-trigger playback from start to end addresses and stops at EOM marker, if EOM

is prior to end address. Toggle on-off.

PLAYL

•

loop playback from start to end addresses.

: Level-hold playback from start to end addresses. Also, if constantly Low, device will

2.2. Direct trigger operational mode

• While

is active, utilizing, FMC1, &

MODE

FMC2

adapt various (1 to 8) fixed equal message configurations for random access and pre-defines the fixed message duration accordingly.

• The control pins are:

~M8 (message activation) and

• The record or playback operation is pre-defined by the

• Each message can be randomly accessed via its message control pin (

desired operation is facilitated accordingly.

FMC3

, the device reconfigures some pins to

/PR

(record or playback selection).

/PR

pin.

~M8) and the

Publication Release Date: October 9, 2007

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3. BLOCK DIAGRAM

ISD14B20

Rosc

MIC+_

AnaIn

AGC

Address Trigger:

Direct Trigger:

NORM

MODE

Pre-

Amp

LED

Amp

Automatic

Gain Control

(AGC)

Clock Control

Antialiasing

Filter

Device & Address Control

PlayLPlayE

REC

FMC2FMC3

S0 S1 S2 S3 E0 E1 E2 E3

XCLK

M1 M2 M3R/P M8M6 M7FMC1

Non-Volatile

Multi Level Storage

Array

Switch

Smoothing

Filter

Power Conditioning

CCAVSSA

CCD

SSD

CCpVSSP1

Amp

SP +

SP -

SSP2

Publication Release Date: October 9, 2007

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4. PAD DESCRIPTION

PAD NAME I / O FUNCTION

SSD

/M1

/M2

S2 /

PLAYL

/ FMC1

/M5

SSA

E1/

/M7

SSP2

SP- O

CCP

SP+ O

SSP1

AGC I

MIC+ / AnaIn I

Digital Ground: Ground path for digital circuits.

[1]

: In Norm mode, Start Address Bit 0.

: When

& debounce existed.

[1]

: In Norm mode, Start Address Bit 1.

: When

& debounce existed.

[1]

: In Norm mode, Start Address Bit 2.

: When

& debounce existed.

[1]

: In Norm mode, Start Address Bit 3.

: When

is active, low active operation on 1

MODE

is active, low active operation on 2

MODE

is active, low active operation on 3

MODE

is active, low active operation on 4

MODE

& debounce existed.

PLAYL

: In Norm mode, low active input, Level-hold playback start to end

addresses, debounce & internal pull-up existed. Holding perform looping playback function from start to end addresses with insignificant dead time between messages regardless of sampling frequencies.

FMC1 : When

various fixed-message configurations.

[1]

: In Norm mode, End Address Bit 0.

: When

MODE

is active, , together with FMC2 & , setup

MODE

FMC1

is active, low active operation on 5

& debounce existed.

Analog Ground: Ground path for analog circuits.

[1]

: In Norm mode, End Address Bit 1.

: When

& debounce existed.

[1]

: In Norm mode, End Address Bit 2.

: When

& debounce existed.

[1]

: In Norm mode, End Address Bit 3.

: When

is active, low active operation on 6

MODE

is active, low active operation on 7

MODE

is active, low active operation on 8

MODE

& debounce existed.

Ground: Ground for negative PWM speaker driver. SP-: Negative signal of the differential Class-D PWM speaker outputs. This output,

together with the SP+, is used to drive an 8Ω speaker directly.

Speaker Power Supply: Power supply for PWM speaker drivers. SP+: Positive signal of the differential Class-D PWM speaker outputs. This output,

together with the SP-, is used to drive an 8Ω speaker directly.

Ground: Ground for positive PWM speaker driver. Automatic Gain Control (AGC): The AGC adjusts the gain of the microphone

preamplifier circuitry.

• MIC+ : Non-inverting input of the differential microphone signal.

• AnaIn : When

is selected, the MIC+ input is configured to a single-ended input with 1Vp-p maximum input amplitude and feed-through to the speaker outputs.

ISD14B20

Message. Internal pull-up

PLAYL

Low constantly will

FMC3

Message. Internal pull-up

Publication Release Date: October 9, 2007

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PAD NAME I / O FUNCTION

MIC- I

MIC- : Inverting input of the differential microphone signal. While MIC- pin is disabled and must be floated.

Rosc I

Oscillator Resistor: Connect an external resistor from this pin to V internal sampling frequency.

CCA

LED

Analog Power Supply: Power supply for analog circuits.

LED output: During recording, this output is Low. Also, momentarily at the end of playback.

PLAYE

/ FMC2

PLAYE

: In Norm mode, low active input, edge-trigger playback from start to end

addresses & toggle on-off. Debounce & internal pull-up existed.

FMC2 : When

is active, , together with & , setup

MODE

FMC2 FMC1

various fixed-message configurations.

REC//PR

REC

: In Norm mode, level-hold (after 1 sec holding) or edge-trigger (toggle on-off), low active, recording from start to end addresses. Debounce & internal pull-up existed.

/PR

( When

• When

/PR

is active):

MODE

is set to Low, level-hold record operation is selected.

is set to High, edge-trigger & toggle on-off playback operation is

selected.

XCLK

FMC3

External Clock: In Norm mode, low active and level-hold input. As activated, Rosc pin accepts external clock input signal, provided resistor at Rosc must be removed. Connecting this pin to High enables device running on internal

clock via Rosc resistor. If not used, When

MODE

is active,

FMC3

XCLK

, together with & FMC2 , setup various fixed-

message configurations.

Feed-Through : Low active input, Level-hold, debounce & Internal pull-up required.

When

is selected, the MIC+ input is configured to a single-ended input with

1Vp-p maximum input amplitude and feed-through to the speaker outputs.

Norm /

MODE

I Level-hold input.

• Norm : When set to High, the device operates under Address trigger condition.

•

: When set to Low, the device operates under direct trigger condition. The

MODE

device reconfigures its pin definitions to fit various fixed-message configurations utilizing ,FMC2 & pins as below table. FMC1

FMC3

FMC2 FMC1

FMC3

0 0 0 1 0 0 1 2 0 1 0 3 0 1 1 4 1 0 0 5 1 0 1 6 1 1 0 7 1 1 1 8

Digital Power Supply: Power supply for digital circuits.

Notes:

CCD

[1]

: Address bits , , , , , , & E3 are used to access the memory location.

S0 S1 S2 S3 E0 E1 E2

must be at high level.

FMC1

# of fixed messages

ISD14B20

is enabled,

to select the

SSA

LED

pulses Low

FMC3

XCLK

Publication Release Date: October 9, 2007

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5. FUNCTIONAL DESCRIPTION

ISD14B20

There are two operational modes: address trigger ( ) and direct trigger ( condition is selected on /

5.1. ADDRESS TRIGGER ( ) OPERATION

The start address bits ( , , & ) and end address bits ( , , & ) are used

NORM

S0 S1 S2 S3 E0 E1 E2 E3

, the power must be cycled to enable it.

MODE

NORM

). After a new

MODE

to access the memory location and they can divide the memory into a maximum of 16 slots. As an example of I14B20, they are defined as follows:

( )

0 0 0 0 0 0 0 0 0 1 8 1.25 0 0 1 0 16 2.50 0 0 1 1 24 3.75 0 1 0 0 32 5.00 0 1 0 1 40 6.25 0 1 1 0 48 7.50 0 1 1 1 56 8.75 1 0 0 0 64 10.00 1 0 0 1 72 11.25 1 0 1 0 80 12.50 1 0 1 1 88 13.75 1 1 0 0 96 15.00 1 1 0 1 104 16.25 1 1 1 0 112 17.50 1 1 1 1 120 18.75

( )

(E1)

(E0)

Row # 14B20

Duration [s]

5.1.1. Record (

REC

) Operation

• Low active input, level-hold for level-trigger or falling edge for edge-trigger with debounce required.

• For 8kHz sampling frequency, if

recording is activated. However, if

REC

is held at Low for a period equal to 1 sec or more, then level

REC

is pulsed Low for less than 1 sec, then edge-trigger recording

is initiated.

• For 6.4kHz sampling frequency, if

level recording is activated. However, if

REC

is held at Low for a period equal to 1.25 sec or more, then

REC

is pulsed Low for less than 1.25 sec, then edge-trigger

recording is initiated.

• Recording begins from the start address to end address and

• Recording ceases whenever

REC

returns to High in level-hold mode or a subsequent lower going

LED

is on.

pulse appears while in edge-trigger mode or when end address is reached. Then an EOM marker is

written at the end of message. And

LED

is off.

• Then the device will automatically power down.

• This pin has an internal pull-up device.

• Once

REC

is active, input on FT, /

NORM

S0 S1 S2 S3 E0

, , , , , , , or is

MODE

E1 E2

illegal.

Publication Release Date: October 9, 2007

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