SM1125_06 Datasheet, PDF (7/13 Pages) Nippon Precision Circuits Inc – Multimelody IC for Pagers

SM1125 series
Playback timing diagrams
Playback start
Playback starts 128 ± 1 OSC clock cycles after ST goes HIGH.
Invalid
Data
Valid
Data
SI
MSB
LSB
SC
ST
CLK
*Internal
Clock
MTO
128 1 Clock
Figure 6. 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
CLK
*Internal
Clock
MTO_{;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;}
Figure 7. Stop timing
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