APR9600 Aplus Integrated circuits Inc., APR9600 Datasheet - Page 5

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

APR9600
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INTEGRATED CIRCUITS INC.
3.1.2B Functional Description of Playback Random Access Mode
On power up, the device is ready to record or playback,in any of the enabled message
segments. To playback,/CE must be set low to enable the device and /RE must be set high
to disable recording & enable playback.You initiate playback by applying a high to low edge
on the message trigger pin that represents the message segment you intend to playback.
Playback will continue until the end of the message is reached. If a high to low edge occurs
on the same message trigger pin during playback, playback of the current message stops
immediately.If a different message trigger pin pulses during playback, playback of the
current message stops immediately (indicated by one beep) and playback of the new
message segment begins. A delay equal to 8,400 cycles of he sample clock will be
encountered before the device starts playing the new message.If a message trigger pin is
held low, the selected message is played back repeatedly as long as the trigger pin stays
low. A period of silence, of a duration equal to 8,400 cycles of the sampling clock, will be
inserted during looping as an indicator to the user of the transition between the end and the
beginning of the message.
3.1.3
Tape Mode :
Tape mode manages messages sequentially much like traditional cassette tape recorders.
Within tape mode two options exist, auto rewind and normal. Auto rewind mode configures
the device to automatically rewind to the beginning of the message immediately following
recording or playback of the message. In tape mode,using either option, messages must be
recorded or played back sequentially, much like a traditional cassette tape recorder
Function Description of Recording in Tape Mode using the Auto Rewind Option
3.1.3.1A
On power up, the device is ready to record or playback,starting at the first address in the
memory array. To record, /CE must be set low to enable the device and /RE must be set
low to enable recording. A falling edge of the /M1_MESSAGE pin initiates voice recording
(indicated by one beep).A subsequent rising edge of the /M1_MESSAGE pin during
recording stops the recording (also indicated by one beep). If the M1_MESSAGE pin is
held low beyond the end of the available memory, recording will stop automatically
(indicated by two beeps). The device will then assert a logic low on the /M7_END pin until
the /M1 Message pin is released.
The device returns to standby mode when the /M1_MESSAGE pin goes high again.After
recording is finished the device will automatically rewind to the beginning of the most
recently recorded message and wait for the next user input. The auto rewind function is
convenient because it allows the user to immediately playback and review the message
without the need to rewind. However, caution must be practiced because a subsequent
record operation will overwrite the last recorded message unless the user remembers to
pulse the /M2_Next pin in order to increment the device past the current message.
A subsequent falling edge on the /M1_Message pin starts a new record operation,
overwriting the previously existing message. You can preserve the previously recorded
message by using the /M2_Next input to advance to the next available message segment.
To perform this function, the /M2_NEXT pin must be pulled low for at least 400 cycles of the
sample clock.The auto rewind mode allows the user to record over the just recorded
message simply by initiating a record sequence without first toggling the /M2_NEXT pin.
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