ISD1400 SERIES
PIN NAME
REC
PIN NO
FUNCTION
Record Input
: The
REC
input is an active-LOW record
27
signal. The device records whenever
REC
is LOW. This
signal must remain LOW for the duration of the recording.
REC
takes precedence over either playback (
PLAYE
or
PLAYL ) signal. If
REC
is pulled LOW during a playback
cycle, the playback immediately ceases and recording
begins.
A record cycle is completed when
REC
is pulled HIGH or
the memory space is filled.
And end-of-message marker (EOM) is internally recorded,
enabling a subsequent playback cycle to terminate
appropriately. The device automatically powers down to
standby mode when
REC
goes HIGH.
Notes:
[1]
The
REC
signal is debounced for 50 ms on the rising edge to prevent a false retriggering from a push-
button switch.
During playback, if either
PLAYE or PLAYL is held LOW during EOM or OVF, the device will still
enter into standby mode and the internal oscillator and timing generator will stop. However, the rising
[2]
edge of PLAYE and PLAYL are not debounced and any subsequent falling edge (particularly switch
bounce) present on the input pins will initiate another playback.
-9-
Publication Release Date: November 16, 2005
Revision 1.3
WINBOND [ WINBOND ]
