APR6008 Aplus Integrated circuits Inc., APR6008 Datasheet - Page 12

• Manufacturer Part Number: APR6008
• Description: 8 Min. -- Recording & Playback Voice Ic
• Manufacturer: Aplus Integrated circuits Inc.

Recording Audio Data
When a SET_REC or REC command is issued the
device will begin sampling and storing the data
present on ANAIN+ and ANAIN- to the specified
sector.
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 return high will be queued up and
executed during the ext SAC cycle.
Figure 13 shows a typical timing diagram and
OpCode sequence for a recording operation.
In this example the SET_REC command begins
recording at the specified memory location after
Tarac time has passed.
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12
Some time later the low going edge on the SAC
pin alerts the host processor that the first sector is
nearly full. The host processor responds by issuing
a REC command before the SAC pin returns high.
The REC command instructs the APR6008 to
continue recording in the sector immediately
following the current sector. When the first sector
is full the device automatically jumps to the next
sector and returns the SAC signal to a high state
to indicate that the second sector is now being
used.
At this point the host processor decides to issue a
STOP command during the next SAC cycle.
The device follows the STOP command and
terminates recording after TSarec. The /BUSY pin
indicates when actual recording is taking place.
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APR6008
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