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ISD2532 Datasheet(PDF) 31 Page - Winbond |
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ISD2532 Datasheet(HTML) 31 Page - Winbond |
31 / 42 page ISD2532/40/48/64 TABLE 13: APPLICATION EXAMPLE – BASIC DEVICE CONTROL Control Step Function Action 1 Power up chip and select Record/Playback Mode 1. PD = LOW, 2. P/ R = As desired 2 Set message address for record/playback Set addresses A0-A8 3A Begin playback P/ R = HIGH, CE = Pulse LOW 3B Begin record P/ R = LOW, CE = LOW 4A End playback Automatic 4B End record PD or CE = HIGH TABLE 14: APPLICATION EXAMPLE – PASSIVE COMPONENT FUNCTIONS Parts Function Comments R1 Microphone power supply decoupling Reduces power supply noise R2 Release time constant Sets release time for AGC R3, R5 Microphone biasing resistors Provides biasing for microphone operation R4 Series limiting resistor Reduces level to prevent distortion at higher supply voltages R6 Series limiting resistor Reduces level to high supply voltages C1, C5 Microphone DC-blocking capacitor Low- frequency cutoff Decouples microphone bias from chip. Provides single-pole low-frequency cutoff and command mode noise rejection. C2 Attack/Release time constant Sets attack/release time for AGC C3 Low-frequency cutoff capacitor Provides additional pole for low-frequency cutoff C4 Microphone power supply decoupling Reduces power supply noise C6, C7, C8 Power supply capacitors Filter and bypass of power supply Publication Release Date: June 2003 - 31 - Revision 1.0 |
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Similar Description - ISD2532 |
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