ISD2532 WINBOND [Winbond], ISD2532 Datasheet - Page 31

• Manufacturer Part Number: ISD2532
• Description: SINGLE-CHIP, MULTIPLE-MESSAGES, VOICE RECORD/PLAYBACK DEVICE 32-, 40-, 48-, AND 64-SECOND DURATION
• Manufacturer: WINBOND [Winbond]

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