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SM1125 Datenblatt(PDF) 2 Page - Nippon Precision Circuits Inc |
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SM1125 Datenblatt(HTML) 2 Page - Nippon Precision Circuits Inc |
2 / 13 page SM1125 series SEIKO NPC CORPORATION —2 BLOCK DIAGRAM PIN DESCRIPTION Number Name I/O Function 1 OSC I Built-in RC oscillator option: External resistor and capacitor connection pins External clock input option: External reference clock input (gate circuit built-in) 2 SI I Playback control serial interface data input 3 SC I Playback control serial interface clock input 4 ST I Playback start/stop control signal input 5 TEST I Test input pin. Leave open or tie to VSS. (Pull-down resistance built-in) 6 MTO O Playback melody signal output 7 VDD – Supply pin (+) 8 VSS – Ground pin Gate 1/2 or 1/4 SW2 Divider 1/128 Scale Counter Scale ROM Tempo Latch Tempo Counter Rhythm Counter Address Counter Start Address Latch Main ROM Control Circuit OSC SI SC ST VSS VDD MTO TEST Multi- Plexer OSC SW1 Master slice |
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