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ISD1800 Datasheet(PDF) 6 Page - Winbond

Part No. ISD1800
Description  SINGLE-CHIP, SINGLE-MESSAGE VOICE RECORD/PLAYBACK DEVICE 6- TO 16-SECOND DURATION
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Maker  WINBOND [Winbond]
Homepage  http://www.winbond.com
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ISD1800 Datasheet(HTML) 6 Page - Winbond

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I1800 SERIES
6. PIN DESCRIPTION
PIN NAME
PIN NO.
I/O
FUNCTION
VSSD, VSSA
1, 16
Ground Supplies: Similar to VCCA and VCCD, the
analog and digital circuits internal to the I1800
device use separate ground buses to minimize
noise. These pins should be tied together as
close as possible to the device.
REC
1
2
I
Record: The REC input is an active-HIGH record
signal. The device records whenever REC is
HIGH. This pin must remain HIGH for the duration
of the recording. REC takes precedence over
either playback (PLAYL or PLAYE) signal. If REC
is pulled HIGH during a playback cycle, the
playback immediately ceases and recording
begins. A record cycle is completed when REC is
pulled LOW. An End-of-Message (EOM) marker
is internally recorded, enabling a subsequent
playback cycle to terminate appropriately. The
device automatically powers down to standby
mode when REC goes LOW. This pin has an
internal pull-down device. Holding this pin HIGH
will increase standby current consumption.
PLAYE
3
I
Playback, Edge-activated: When a HIGH-going
transition is detected on this input pin, a playback
cycle begins. Playback continues until an End-of-
Message (EOM) marker is encountered or the
end of the memory space is reached. Upon
completion of the playback cycle, the device
automatically powers down into standby mode.
Taking PLAYE LOW during a playback cycle will
not terminate the current cycle. This pin has an
internal pull-down device. Holding this pin HIGH
will increase standby current consumption.
PLAYL
4
I
Playback, Level-activated: When this input pin
level transits from LOW to HIGH, a playback cycle
is initiated. Playback continues until PLAYL is
pulled LOW or an End-of-Message (EOM) marker
is detected, or the end of the memory space is
reached. The device automatically powers down
to standby mode upon completion of the playback
cycle. This pin has an internal pull-down device.
Holding this pin HIGH will increase standby
current consumption.
NC
5, 6, 7, 8, 9,
11, 14, 20, 21,
22, 23, 24
Not Connected.
- 6 -


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