19-03-2012, 02:50 PM
Single-Chip Voice Recording & Playback Device 60-Second Duration
[attachment=18558]
Features :
• Single-chip, high-quality voice recording & playback solution
- No external ICs required
- Minimum external components
• Non-volatile Flash memory technology
- No battery backup required
• User-Selectable messaging options
- Random access of multiple fixed-duration messages
- Sequential access of multiple variable-duration messages
• User-friendly, easy-to-use operation
- Programming & development systems not required
- Level-activated recording & edge-activated play back switches
• Low power consumption
- Operating current: 25 mA typical
- Standby current: 1 uA typical
- Automatic power-down
• Chip Enable pin for simple message expansion
2 General Description :
The APR9600 device offers true single-chip voice recording,non-volatile storage, and
playback capability for 40 to 60 seconds.The device supports both random and sequential
access of multiple messages.Sample rates are user-selectable,allowing designers to
customize their design for unique quality and storage time needs.Integrated output
amplifier,microphone amplifier, and AGC circuits greatly simplify system design. the device
is ideal for use in portable voice recorders, toys, and many other consumer and industria
applications.
Functional Description :
APR9600 block diagram is included in
order to describe the device's internal
architecture. At the left hand side of the
diagram are the analog inputs. A
differential microphone amplifier, including
integrated AGC, is included on-chip for
applications requiring use.The amplified
microphone signals fed into the device
by connecting the ANA_OUT pin to the
ANA_IN pin through an external DC
blocking capacitor.
Message Management General Description
Playback and record operations are managed by on-chip circuitry. There are several
available messaging modes depending upon desired operation.These message modes
determine message management style, message length, and external parts count.
Therefore, the designer must select the Appropriate operating mode before beginning the
design. Operating modes do not affect voice quality; for information on factors affecting
quality refer to the Sampling Rate & Voice Quality section.The device supports five
message management modes (defined by the MSEL1, MSEL2 and /M8_OPTION pins
shown in Figures 1 and 2):
Random Access Mode
Random access mode supports 2, 4, or 8 Message segments of fixed duration. As
suggested recording or playback can be made randomly in any of the selected messages.
The length of each message segment is the total recording length available (as defined by
the selected sampling rate) divided by the total number of segments enabled (as decoded
in Table1). Random access mode provides easy indexing to message segments.
3.1.2A Functional Description of Recording in Random Access Mode
On power up, the device is ready to record or playback in any of the enabled message
segments. To record,/CE must be set low to enable the device and /RE must be set low to
enable recording. You initiate recording by applying a low level on the message trigger pin
that represents the message segment you intend to use.The message trigger pins are
labeled /M1_MESSAGE - /M8_OPTION on pins 1-9 (excluding pin 7) for message
segments 1-8 respectively.
[attachment=18558]
Features :
• Single-chip, high-quality voice recording & playback solution
- No external ICs required
- Minimum external components
• Non-volatile Flash memory technology
- No battery backup required
• User-Selectable messaging options
- Random access of multiple fixed-duration messages
- Sequential access of multiple variable-duration messages
• User-friendly, easy-to-use operation
- Programming & development systems not required
- Level-activated recording & edge-activated play back switches
• Low power consumption
- Operating current: 25 mA typical
- Standby current: 1 uA typical
- Automatic power-down
• Chip Enable pin for simple message expansion
2 General Description :
The APR9600 device offers true single-chip voice recording,non-volatile storage, and
playback capability for 40 to 60 seconds.The device supports both random and sequential
access of multiple messages.Sample rates are user-selectable,allowing designers to
customize their design for unique quality and storage time needs.Integrated output
amplifier,microphone amplifier, and AGC circuits greatly simplify system design. the device
is ideal for use in portable voice recorders, toys, and many other consumer and industria
applications.
Functional Description :
APR9600 block diagram is included in
order to describe the device's internal
architecture. At the left hand side of the
diagram are the analog inputs. A
differential microphone amplifier, including
integrated AGC, is included on-chip for
applications requiring use.The amplified
microphone signals fed into the device
by connecting the ANA_OUT pin to the
ANA_IN pin through an external DC
blocking capacitor.
Message Management General Description
Playback and record operations are managed by on-chip circuitry. There are several
available messaging modes depending upon desired operation.These message modes
determine message management style, message length, and external parts count.
Therefore, the designer must select the Appropriate operating mode before beginning the
design. Operating modes do not affect voice quality; for information on factors affecting
quality refer to the Sampling Rate & Voice Quality section.The device supports five
message management modes (defined by the MSEL1, MSEL2 and /M8_OPTION pins
shown in Figures 1 and 2):
Random Access Mode
Random access mode supports 2, 4, or 8 Message segments of fixed duration. As
suggested recording or playback can be made randomly in any of the selected messages.
The length of each message segment is the total recording length available (as defined by
the selected sampling rate) divided by the total number of segments enabled (as decoded
in Table1). Random access mode provides easy indexing to message segments.
3.1.2A Functional Description of Recording in Random Access Mode
On power up, the device is ready to record or playback in any of the enabled message
segments. To record,/CE must be set low to enable the device and /RE must be set low to
enable recording. You initiate recording by applying a low level on the message trigger pin
that represents the message segment you intend to use.The message trigger pins are
labeled /M1_MESSAGE - /M8_OPTION on pins 1-9 (excluding pin 7) for message
segments 1-8 respectively.