APR6016 View Datasheet(PDF) - APLUS INTEGRATED CIRCUITS

Part Name

Description

Manufacturer

APR6016

16 min. -- Recording & Playback Voice IC

APLUS INTEGRATED CIRCUITS 

INTEGRATED CIRCUITS INC.--APR6016

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

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.

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

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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