APR6016 Aplus Integrated circuits Inc., APR6016 Datasheet - Page 13

• Manufacturer Part Number: APR6016
• Description: Recording & Playback Voice Ic
• Manufacturer: Aplus Integrated circuits Inc.

Playing Back Audio Data
When a SET_PLAY or PLAY command is issued
the device will begin sampling the data in the
specified sector and produce a resultant output on
the AUDOUT,ANAOUT-, and ANAOUT+ pins. After
half the sector is used the SAC pin will drop low to
indicate that a new command can be accepted. The
device will accept commands as long as the SAC
pin remains low. Any command received after the
SAC returns high will be queued up and executed
during the next SAC cycle.
Figure 14 shows a typical timing diagram and
OpCode sequence for a playback operation. The
SET_PLAY command begins playback at the
specified memory location after Taplay time has
Handshaking signals
Several signals are included in the device that allow
for handshaking. These signals can simplify
message management significantly depending on
the message management scheme used.The /INT
signal can be used to generate interrupts to the
processor when attention is required by the
APR6016 This pin is normally high and goes low
when an interrupt is requested. An interrupt is
generated
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13
passed. Some time later the low going edge on
the SAC pin alerts the host processor that half of
the first sector has been played back. The host
processor responds by issuing a PLAY command
during the SAC low time. The PLAY command
instructs the APR6016 to continue playback of the
sector immediately following the current sector.
When the first sector has been played back the
device jumps to the next sector and returns the
SAC signal to a high state to indicate that the
second sector is now being played. At this point
the host processor decides to issue a STOP
command during the next available SAC low time.
The device follows the STOP command and
terminates playback after TSaplay The /BUSY pin
indicates when actual playback is taking place.
whenever an EOD or Overflow occurs. An
interrupt is also generated after a PWRUP
command if a low battery VCC is sensed.
The SAC signal is used to determine when the
device is nearing the end of the current memory
segment during a record, play or forward
operation. The SAC signal is in a normally high
state. The signal goes low after half the currently
active segment has been played or recorded.
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APR6016
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