ISD1964SYI Datasheet, PDF (19/29 Pages) List of Unclassifed Manufacturers – SINGLE-CHIP, MULTIPLE-MESSAGE VOICE RECORD/PLAYBACK DEVICE

ISD1900
Example of four Fixed-Message Configuration:
35
Addr/Drct
FM3
FM2
FM1
R/P
M1 ~ M4
LED
Mic+/-
or AnaIn
T_FSet
Start
T_Deb
T_Deb
Stop
T_Settle1
T_Deb
Start
T_Ers
T_Ers
End of Duration
T_Stop1
Figure 6-8 Record Operation under FMC mode
Addr/Drct
FM3
FM2
FM1
R/P
M1 ~ M4
T_FSet
Start
Stop
Start
T_EOM
LED
T_Deb
Sp+
Sp-
T_Deb ^TSettle2
T_Deb
End of Message
Figure 6-9 Playback Operation under FMC mode
6.3. OTHER OPERATIONS
16
6.3.1 Rosc Operation
26
• When the R_OSC varies from 53.3 KΩ to 160 KΩ, the sampling frequency changes from 12 to 4 kHz
accordingly.
• When R_OSC resistor value is changed during playback, the tone of a recorded message will alter either
faster or slower.
• If the ground side of R_OSC resistor is floated or tied to V_CC, then the current operation will be freezed.
• The operation will resume when the resistor is connected back to ground.
Publication Release Date: Jan 5, 2009
19
Revision 0.51