UPD63710 Просмотр технического описания (PDF) - NEC => Renesas Technology
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UPD63710 Datasheet PDF : 4 Pages
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Fig. 4 Display Example for Calculating Frequency Characteristics with µPD63710 Filter Simulation Software
performed with an emphasis placed on the
servo characteristics of the µPD63710.
• In the system evaluation mode, the basic
operations of a CD player, such as fast-
forward/rewind, random, and repeat
playback, can be verified. By connecting
an emulation board with an emulation
probe, firmware of a microcontroller can
be developed instead of using the
µPD78P058 (Fig. 3).
2. Outline of µPD63710 filter simulation
software
The µPD63710 filter simulation software
performs the following simulation for each
of the filters for focus, tracking, sled, spindle,
and gain detection:
• If a specific coefficient is set, the frequency
characteristics of the gain and phase under
the set conditions are calculated.
• By setting a filter type and parameters
related to the filter type, the characteristics
that can be realized are approximated and
coefficients are calculated.
• An output wave with a sine wave input to
the filter is shown above (Fig. 4). The
calculated coefficients can be saved to or
read from a file.
Future Development
NEC has successfully integrated an RF
amplifier on an LSI for CD, which has been
considered a difficult task. Based on this
success, NEC will continue promoting the
development of SOC (System-On-a-Chip).
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