Rainbow Electronics ISD18B12 User Manual

ADVANCED

ISD18B12

SINGLE-CHIP, SINGLE-MESSAGE

VOICE RECORD/PLAYBACK DEVICE

6- TO 12-SECONDS DURATION

Publication Release Date: August 17, 2007

- 1 - Revision A1

ISD18B12

TABLE OF CONTENTS

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

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

3. BLOCK DIAGRAM ........................................................................................................................... 4

4. PAD DESCRIPTION ......................................................................................................................... 5

5. FUNCTIONAL DESCRIPTION ......................................................................................................... 6

6. ABSOLUTE MAXIMUM RATINGS ................................................................................................ 11

6.1 Operating Conditions ................................................................................................................... 11

7. ELECTRICAL CHARACTERISTICS.............................................................................................. 12

7.1. DC Parameters ........................................................................................................................... 12

7.2. AC Parameters ........................................................................................................................... 13

8. TYPICAL APPLICATION CIRCUIT ............................................................................................... 14

9. DIE INFORMATION ........................................................................................................................ 16

10. ORDERING INFORMATION .......................................................................................................... 17

11. VERSION HISTORY ....................................................................................................................... 18

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ISD18B12

1. GENERAL DESCRIPTION

Winbond’s ISD18B12 ChipCorder® is a new single-chip single-message record/playback device with a special TryMe feature. The user-selectable duration is from 6 to 12 seconds, with wide operating voltage ranging from 2.4V to 5.5V. Its sampling frequency, ranging from 4kHz to 8kHz, is externally controlled via resistor at Rosc pin. This device also includes microphone amplifier, anti-aliasing filter, multilevel storage array, smoothing filter and speaker amplifier. Two external resistors are used to adjust the microphone amplifier gain for the incoming signal. Thus, a minimum record/playback subsystem can be configured with a microphone, a speaker, several passive components, two push buttons, and a power source.

Recordings are stored into on-chip non-volatile memory, providing zero-power message storage. This unique, single-chip solution is made possible through Winbond’s patented Multi-Level Storage technology. Voice and audio signals are stored directly into memory in their natural form, providing high-quality, solid-state voice reproduction. The device is automatically power down after each operation cycle with typical standby current, 1µA. With the embedded Flash memory employed, data retention up to 100 years and typical 100,000 erase/record cycles can be reached.

2. FEATURES

• Supply voltage: 2.4V to 5.5V

• User-selected variable sampling frequency and duration via external resistor

Sampling Frequency 8 kHz 6.4 kHz 5.3 kHz 4 kHz Rosc 80 KΩ 100 KΩ 120 KΩ 160 KΩ Duration 6 secs 7.5 secs 9 secs 12 secs

• RECL : Level recording

RECE : Edge-trigger, toggle on-off

•

PLAYE : Edge-trigger, toggle on-off

•

PLAYL

•

: Level playback or looping playback

LEDR : LED output for recording

LEDP : LED output for playback

FT : Feed-through microphone input to speaker outputs

• Microphone amplifier gain: user control via two external resistors

• With feed-through enabled, r

ecord microphone signal into memory while feed-through path

remains active

• Playback takes precedence over the Recording operation

TryMe : TryMe special mode

•

• Package option: die only

• Temperature options: 0°C to +50°C

Publication Release Date: August 31, 2007

- 3 - Revision A1

3. BLOCK DIAGRAM

ISD18B12

INPUT

OSC

MICIN

MICOUT

Clock Control

Sampling Clock

Filter

Amp

Power Conditioning

SSAVSSDVCCD

CCA

Non-Volatile

Multi Level Storage

Array

Switch

TryMe

RECL LEDPFT

Filter

Device Control

RECE

Amp

LEDRPLAYLPLAYE

SP+

SP-

- 4 -

4. PAD DESCRIPTION

PAD NAME I / O FUNCTION

SSD

RECL

PLAYE

PLAYL

RECE

NC -- NC: No Connect

MICIN I

NC -- NC: No Connect

MICOUT O

NC -- NC: No Connect

SP- O

SSA

SP+ O

CCA

Rosc I

NC -- NC: No Connect

TryMe

Digital Ground: Ground path for digital circuits.

Level-Triggered Record: Low active input, Level-hold.

Edge-Triggered Playback: Low active input, Edge-trigger,

Level-Triggered Playback: Low active input, Level-hold.

Edge-Triggered Record: Low active input, Edge-trigger,

Microphone Input: The MICIN transfers input signal to the on-chip

microphone amplifier.

Microphone Output: Output of the microphone amplifier.

SP-: The negative signal of the differential speaker outputs.

Analog Ground: Ground path for analog circuits.

SP+: The positive signal of the differential speaker outputs.

Power Supply: Power supply for analog circuits.

Oscillator Resistor: Connect an external resistor from this pin to V

select the sampling frequency

Feed-Through (FT): Low active input, Level-hold, Feed-through microphone input to speaker outputs while in active state.

TryMe Mode : High active input, Level-hold. A special operating mode.

ISD18B12

toggle on-off.

SSA

LED output for Playback: During playback, this output is Low.

LEDP

NC -- NC: No Connect

CCD

LEDR

Sound Effect: Low active input, Level-hold, optional beeping sound effect.

Power Supply: Power supply for digital circuits.

LED output for Recording: During recording, this output is Low.

Publication Release Date: August 31, 2007

- 5 - Revision A1

ISD18B12

5. FUNCTIONAL DESCRIPTION

For the following related operations, if SE is not enabled, then no beep sound is heard. Also, the timing diagrams may not be in direct proportional scale.

5.1. Level-triggered Record (

• Recording starts from beginning of the memory and

• Recording ceases whenever

RECL

) Operation :

RECL

LEDR is on.

returns to High or when end of memory is reached and

off.

• Then device will automatically power down.

Fig. 1: Record–Level (

RECL

LEDR

BEEP

(Optional)

MicIn

LEDP

5.2. Edge-triggered Record (

• Recording starts from beginning of the memory and

RECL ) function till memory full

Deb

RECE

)Operation :

Memory Full

LEDR is on.

• Recording ceases whenever a subsequent trigger occurs at

LEDR is off.

and

• Then device will automatically power down.

RECE

or when end of memory is reached

LEDR

Fig. 2: Record–Edge (

RECL

LEDR

BEEP

(Optional)

MicIn

LEDP

RECE ) function with on-off

Deb

Stop

Deb

Memory Full

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