ISD2540 datasheet(34/42 Pages) WINBOND

Part #	ISD2540

Description	SINGLE-CHIP, MULTIPLE-MESSAGES, VOICE RECORD/PLAYBACK DEVICE 32-, 40-, 48-, AND 64-SECOND DURATION

PDF	42 Pages

Scroll/Zoom	100%

Manufacturer	WINBOND [Winbond]

Direct Link	http://www.winbond.com

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34 / 42 page

ISD2532/40/48/64

TABLE 15: APPLICATION EXAMPLE – PUSH-BUTTON CONTROL

Control Step

Function

Action

Select Record/Playback Mode

P/ R = As desired

Begin playback

P/ R = HIGH, CE = Pulse LOW

Begin record

P/ R = LOW, CE = Pulse LOW

Pause record or playback

= Pulsed LOW

End playback

Automatic at EOM marker or PD = Pulsed HIGH

End record

PD = Pulsed HIGH

TABLE 16: APPLICATION EXAMPLE – PASSIVE COMPONENT FUNCTIONS

Parts

Function

Comments

Release time constant

Sets release time for AGC

Series limiting resistor

Reduces level to prevent distortion at

higher supply voltages

R6, R7

Pull-up and pull-down resistors

Defines static state of inputs

C1, C4, C5

Power supply capacitors

Filters and bypass of power supply

Attack/Release time constant

Sets attack/release time for AGC

Low-frequency cutoff capacitor

Provides additional pole for low-frequency

cutoff

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ISD2540 Datasheet(PDF) 34 Page - Winbond