Specifications
CIRCUIT IDEAS
S2 (PLAYL). Pressing
(grounding) this pin ends the
power-down mode and ini-
tiates the play cycle. The
stored/recorded message is
played until finished or this
pin is taken ‘high’.
S3(PLAYE). Pressing
(grounding) this pin momen-
tarily ends the power-down
mode and enters the play
mode. Subsequent taking of
this pin ‘high’ has no effect.
However, pressing this pin
once more finishes the play
mode and the chip enters
the power-down mode.
The action is analogous to
the falling-edge trigger
mode.
S4 (PLAY/RPT). Press-
ing (grounding) this pin ends
the power-down mode and
enters the play mode. The chip will com-
plete the recorded message and then keep
repeating the message as long as it is
kept pressed. When released, it will en-
ter the power-down mode.
LED1 connected to BUZY pin lights
up to indicate end of power-down
mode and remains ‘on’ during record
and play-mode active period. A beep is
produced in the speaker to indicate start
of record cycle and also that the memory
is full.
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