SM1126V 데이터 시트보기 (PDF) - Nippon Precision Circuits

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SM1126V

Melody IC with Built-in SRAM

Nippon Precision Circuits  

SM1126 Series

Playback timing diagrams

Playback start

Playback starts after an interval tST after ST goes HIGH.

When the reference clock frequency is 32.768 kHz, tST = (256 ± 1 oscillator cycles) + 1/128 seconds.

When the reference clock frequency is 38.4 kHz, tST = (300 ± 1 oscillator cycles) + 1/128 seconds.

Play Start Command

SIO MSB

SC

ST

OSC

*Internal

Clock

MTO

LSB

256(300) 1 Clock

1/128 sec

Figure 7. Playback start timing

,,,,,,,,,,,,,,,

Playback stop

Playback stops immediately when ST goes LOW. In external clock input versions, the IC internal clock also

stops when ST goes LOW, regardless of whether or not there is a clock input signal on pin OSC. In built-in RC

oscillator versions, the oscillator also stops when ST goes LOW.

ST

OSC

*Internal

Clock

MTO ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

Figure 8. Stop timing

NIPPON PRECISION CIRCUITS—9

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