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SN56000 Datasheet(PDF) 5 Page - SONiX Technology Company |
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SN56000 Datasheet(HTML) 5 Page - SONiX Technology Company |
5 / 11 page SN56060 4-Channel Speech Controller 5. FUNCTION DESCRIPTIONS 5.1. Oscillator SN56000 series accepts crystal oscillator / ceramic resonator or RC type oscillator (selected by pin CKSEL) for system clock. The typical circuit diagrams for oscillator are listed as follows. OSC/XIN CKSEL XOUT VDD RC Oscillator Crystal / Resonator VDD OSC/XIN CKSEL XOUT 15pf 2MHz SN56000 SN56000 15pf 5.2. ROM SN56060 contains 184K word (10-bit) internal ROM. Program, voices, melodies, data, and instrument waveforms share the same ROM with the others. 5.3. RAM SN56000 series contains 128 nibble RAM. The 128 nibble RAM is separated into eight pages (page 0, page1… page 7). An implicit page indicator is utilized to specify page address. Eight instructions, PAGE0, PAGE1... PAGE7 can switch the page indicator. All 16 nibbles of each page can be accessed by direct mode (to specify M0 ~ M15 in the data transfer type instructions.) 5.4. Power Down Mode “End” instruction will let SN56000 series enter power down mode and consumer very little amount of current. (<2uA @VDD=3V and <5uA @VDD=5V) After SN56060 enters power down mode, any valid data transition (L H or H L) occurring on any input ports or IO ports (P1, P2, P3 and P6) lead SN56000 series back to normal operation mode. 5.5. Sampling Rate Counters 4 independent sampling rate counters are dedicated to 4 individual voice channels to play voices with different playing rates. The playing rate is programmable from 4KHz to 40KHz. The resolution of sampling period of each sampling rate counter is 0.25 uS. This feature helps SN56000 series play sounds with accurate pitches in the case of music instrument synthesis. Ver: 1.0 March 2,2005 5 |
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