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SPC08A Datasheet(PDF) 7 Page - List of Unclassifed Manufacturers |
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SPC08A Datasheet(HTML) 7 Page - List of Unclassifed Manufacturers |
7 / 15 page SPC08A 6.9. Speech and Melody Since SPC08A provides 6.5K ROM (0.5K for Sunplus test program) only, it is a suitable IC for simple speech and melody synthesis. For speech synthesis, SPC08A can provide NMI for accurate sampling frequency. Users can record or synthesize the sound and digitize it into the ROM. The sound data can be played back in the sequence of the control functions as designed by the user's program. Several algorithms are recommended for high fidelity and compression of sound including PCM, LOG PCM, and ADPCM. 6.10. Power Saving Mode The SPC08A provides a power saving mode (Standby mode) for those applications that require very low stand-by current. To enter standby mode, the Wake-Up Register should be enabled and then stop the CPU clock by writing the STOP CLOCK Register. The CPU will then go to the stand-by mode. In such a mode, RAM and I/Os will remain in their previous states until being awakened. Port IOD5 - 0 are the wake-up sources in SPC08A. After SPC08A is awakened, the internal CPU will go to the RESET State (Tw ≧ 65536 x T1) and then continue processing the program. Wakeup Reset will not affect the contents of RAM and I/Os (FIG.1). T1 Tw CPU CLK Sleep Wake-up Reset FIG. 1 T1 = 1 / (Fcpu), Tw ≧ 65536 x T1 © Sunplus Technology Co., Ltd. Proprietary & Confidential 7 SEP. 19, 2001 Version: 1.7 |
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Similar Description - SPC08A |
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