APR9600 Aplus Integrated circuits Inc., APR9600 Datasheet - Page 6

• Manufacturer Part Number: APR9600
• Description: Single-chip Voice Recording & Playback Device 60-second Duration
• Manufacturer: Aplus Integrated circuits Inc.

APR9600
-
INTEGRATED CIRCUITS INC.
To record over any other message however requires a different sequence. You must pulse
the /CE pin low once to rewind the device to the beginning
of the voice
memory.
The /M2_NEXT pin must then be pulsed low for the specified number of times to move to
the start of the message you wish to overwrite. Upon arriving at the desired message a
record sequence can be initiated to overwrite the previously recorded material.After you
overwrite the message it becomes the last available message and all previously recorded
messages following this message become inaccessible.If during a record operation all
of the available memory is used, the device will stop recording automatically,(double beep)
and set the /M7_END pin low for a duration equal to 1600 cycles of the sample
clock.Playback can be initiated on this last message, but pulsing the /M2_Next pin will put
the device into an "overflow state".Once the device enters an overflow state any
subsequent pulsing of /M1_MESSAGE or /M2_NEXT will only result in a double beep and
setting of the /M7_END pin low for a duration equal to 400 cycles of the sample clock.
To proceed from this state the user must rewind the device to the beginning of the memory
array. This can be accomplished by toggling the /CE pin low or cycling power. All inputs,
except the /CE pin,are ignored during recording.
3.1.3.1B Function Description of Playback in Tape Mode using Auto Rewind Option
On power-up, the device is ready to record or playback,starting at the first address in
the memory array.Before you can begin playback, the /CE input must be set to low
to enable the device and /RE must be set to high to disable recording and enable playback.
The first high to low going pulse of the /M1_MESSAGE pin initiates playback from the
beginning of the current message; on power up the first message is the current message.
When the /M1_MESSAGE pin pulses low the second time, playback of the current
Message stops immediately. When the /M1_MESSAGE pin pulses low a third time,
playback of the current message starts again from its beginning. If you hold the
/M1_MESSAGE pin low continuously the same message will play continuously in a looping
fashion. A 1,540ms period of silence is inserted during looping as an indicator to the user of
the transition between the beginning and end of the message.Note that in auto rewind
mode the device always rewinds to the beginning of the current message. To listen to a
subsequent message the device must be fast forwarded past the current message to the
next message. This function is accomplished by toggling the /M2_NEXT pin from high to
low. The pulse must be low for least 400 cycles of the sampling clock. After the device is
incremented to the desired message the user can initiate playback of the message with the
playback sequence described above. A special case exists when the /M2_NEXT pin goes
low during playback. Playback of the current message will stop, the device will
beep,advance to the next message and initiate playback of the next message. (Note that if
/M2 Next goes low when not in playback mode, the device will prepare to play the next
message, but will not actually initiate playback).
If the /CE pin goes high during playback, playback of the current message will stop, the
device will beep,reset to the beginning of the first message, and wait for a subsequent
playback command.When you reach the end of the memory array, any subsequent pulsing
of /M1_MESSAGE or /M2_NEXT will only result in a double beep. To proceed from this
state the user must rewind the device to the beginning of the memory array. This can be
accomplished by toggling the /CE pin low or cycling power.
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