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ST2204 Scheda tecnica(PDF) 11 Page - Sitronix Technology Co., Ltd. |
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ST2204 Scheda tecnica(HTML) 11 Page - Sitronix Technology Co., Ltd. |
11 / 24 page ST2204 Ver 0.6 11/24 2008/11/10 1 10 0.. P PS SG G 10.1 Function Description The built-in dual channel Programmable Sound Generator (PSG) is controlled by register file directly. Its flexibility makes it useful in applications such as music synthesis, sound effects generation, audible alarms and tone signaling. In order to generate sound effects while allowing the processor to perform other tasks, the PSG can continue to produce sound after the initial commands have been given by the CPU. The structure of PSG was shown in FIGURE 10-2 and the PSG clock source is shown in FIGURE 10-1. The ST2204 has three PSG playing type. One for channel0(C0) & channel1(C1) square type tone sound playing. Second for ch0 square tone sound and ch1 noise sound. The third sound playing type is DAC PCM playing. R C O S C X P S G C[6~4] IN0 IN1 Output S e le ct P S G S e le ctor P S G CK P S G C S YS CK/2 P S G CK S YS CK/4 S YS CK/8 S YS CK/1 6 S YS CK O S CX B6 B5 B4 0 0 0 X X 0 1 1 1 1 1 1 1 0 1 0 0 0 FIGURE 10-1 PSG Clock Source Control Enable Output Enable LOAD Output MUX2 IN0 IN1 OUTPUT SEL MUX2 IN0 IN1 OUTPUT SEL MUX2 IN0 IN1 OUTPUT SEL MIXER CH1 Output Vol_CH1 DACE C1TEN C1Tone C1out DACE PSGC[2] C1NEN C1Noise PSGC[3] PSG0 C1out VOL[1~0] PSG1 BD BDB DACE To Port B From DAC Generator Channel 1 Tone Channel 1 Noise Preload Data Before First Count FIGURE 10-2 PSG Block Diagram |
Codice articolo simile - ST2204 |
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Descrizione simile - ST2204 |
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