isd1616b Winbond Electronics Corp America, isd1616b Datasheet - Page 10

• Manufacturer Part Number: isd1616b
• Description: Single-message Single-chip 6.6- To 40-second Voice Record & Playback Devices With Valert Option
• Manufacturer: Winbond Electronics Corp America

6.2. F
The following example operating sequences demonstrate the functionality of the
at the end of the message. During a record cycle, the device powers down immediately after
6.2.1. Record a Message
The device starts recording from the beginning of the memory when
to Low and stays at Low. A record cycle is completed when
memory is filled up. Then an End-of-Message (EOM) marker is written at the end of message,
enabling a subsequent playback cycle to terminate appropriately. Hence, the device
automatically enters into standby mode.
Record takes precedence over playback operation. If
cycle, the playback immediately halts and recording starts from the beginning of the memory.
Holding
6.2.2. Edge-trigger Playback
A playback operation starts from the beginning of the memory when
going signal exceeding the specified debounced time. Playback continues until an EOM
marker is encountered. Upon completion of a playback cycle, the device automatically enters
into standby mode.
During playback, a subsequent low going signal will terminate the current playback operation.
Holding this pin Low after playback operation will increase standby current consumption.
6.2.3. Level- trigger Playback
When
beginning of the memory until either an EOM marker is reached, then it automatically powers
down.
If
immediately and the device enters into the power-down mode.
6.2.4. LED Operation
The
during playback, the LED blinks a few times per second to indicate a playback operation. It
returns to a High when operation stops.
6.2.5. R
The duration can be varied by changing the value of R
flexibility to choose different sampling frequency, up to 12 KHz, depending upon the needs.
This feature allows frequency shifting where a recorded audio can be played back faster or
slower than normal for special sound effects.
Another feature is a “Pause” function that can be activated by taking the R
stop playback momentarily, and to resume when the resistor is switched back to ground.
REC
UNCTIONAL
PLAYL
LED
is released to High.
PLAYL
OSC
REC
is Low during recording, which turns on an LED as a recording indicator. However,
is pulled High at any time during playback, the playback operation stops
Operation
D
Low after recording will increase standby current consumption.
ESCRIPTION
switches from High to Low and stays at Low, a playback starts from the
E
XAMPLE
- 10 -
REC
OSC
. This means the designer has the
ISD1600B SERIES
is pulled Low during a playback
REC
is pulled to High or entire
REC
PLAYE
OSC
ISD1600B
transits from High
resistor to V
detects a low
series.
CC
to