ISD-ES502 WINBOND [Winbond], ISD-ES502 Datasheet - Page 4

• Manufacturer Part Number: ISD-ES502
• Description: Demonstration Board
• Manufacturer: WINBOND [Winbond]

Button 3 - Voice Notes - The function for Voice Notes is the same as for the Outgoing Message except
that the sampling rate used is the last one entered rather than the original rate used to record the
message. The LED map in the demo board illustrates the paths used to record or playback a local
message.
Because of the ability to control sample rates independent of record and play functionality in this mode, it
is possible to record at one sample rate and playback at another.
Button 4 - Telephone Answering Device (TAD) - The function is similar to that for the OGM except that
when the Record Button is pressed, the sequence "beep," <OGM>, "beep" is heard before the recording
starts. The map shows the configuration for both the prompt and the recording.
Button 5 - Duplex Mode - A recording is made from the microphone input mixed with a simulated
background sound (stored in the ISD2560). During the recording, the background sound is also audible,
as it would be in the real application. Play simply plays back this recording.
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Button 6 – Utility Filter Mode
- Utility Filter Mode demonstrates the capability of the ISD5008 to supply
a filter function for other analog sources. For example, the device could be used as the smoothing filter
for an external D to A converter. To demonstrate this, a sample message (stored in the ISD2560) is
played from the analog input to the speaker through the filter. Utility Filter mode routes an external signal
through the internal low-pass filter. The cutoff frequency of the filter is determined by the most recently
selected sample rate. This mode allows one to hear the effect of the filter cutoff frequency changing with
sample rate.
Button 7 - Feed-Through Mode - This mode illustrates the ability of the ISD5008 to pass through both
input and output circuits of a cellular phone when the configuration is set to pass data both ways and
remains in this state until another function or Cancel is selected. The user will have to supply the external
signals via the jacks at the top of the board.
Button 8 - Restart ES502 - Restarts the ES502 from the introductory phrases, initializing all variables.
Button
- ES502 Off - Turns off the demo board displays and puts the processor, ISD2560, and ISD5008
*
in sleep mode.
Button # - Cancel - Cancels a pending operation; can be used in place of the second key push in modes
2-5 to exit the mode.
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The first version of the ISD-ES502 prompts this mode as “Pager Mode”. This will be changed in the next version
of the product.
ISD-ES502.PDF
02/10/06