sm1125abv Nippon Precision Circuits Inc, (NPC), sm1125abv Datasheet
sm1125abv
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sm1125abv Summary of contents
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... OVERVIEW The SM1125ABV is melody IC fabricated in NPC’s Molybdenum-gate CMOS for use in mobile telecommuni- cations equipment. FEATURES 12 melodies selectable I Level hold playback mode I Built-in oscillator circuit I • Oscillator frequency: 38.4kHz 2-pin serial data melody selection and 1-pin melody I playback control Power save function I • ...
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... Tempo Latch Tempo Counter PIN DESCRIPTION Number Name 1 OSC TEST 6 MTO 7 VDD 8 VSS SM1125ABV 1/2 or 1/4 OSC Scale Divider Counter 1/128 Scale ROM Control Circuit Main ROM Multi- Plexer Rhythm Address Counter Counter Start Address Latch I/O I External resistor and capacitor connection pins ...
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... OH Output voltage V OL Oscillator frequency f OSC ∆ f/f Frequency stability Oscillator start voltage V DOB Oscillator stop voltage V DOS SM1125ABV Condition Condition = 0V 2 Condition Non-playback mode ° C Playback mode, MTO pin open ST, SI, SC pins , ° C ST, SI, SC pins ° ...
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... SWL SC pulse rise time pulse fall time t Sf SI-SC setup time t DS SI-SC hold time input pulse t SWH t SC-SI serial input pulse SC SI SM1125ABV = 0V 2 Condition “SC input pulse” timing “SC-SI serial input pulse” timing 0.9V 0.1V t SWL ...
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... FUNCTIONAL DESCRIPTION Control Functions Reference clock SM1125ABV has built-in RC oscillator circuit (oscillation frequency: 38.4kHz typ). Power-saving function The built-in RC oscillator is stopped when not in playback mode (when ST is LOW), preventing unwanted cur- rent flow. ST OSC Playback control The ST pin controls the start of playback. While ST is HIGH, the melody is played repeatedly, and when ST goes LOW, playback stops. Melodies are selected by input serial data on pins SI and SC, as shown in table 1. The fi ...
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... Playback starts 128 ± 1 OSC clock cycles after ST goes HIGH. Invalid Data *Internal Clock MTO Playback stop Playback stops immediately and the oscillator also stops when ST goes LOW. ST *Internal Clock MTO SM1125ABV Valid Data MSB LSB 128 1 Clock Figure 4. Start timing Figure 5. Stop timing SEIKO NPC CORPORATION —6 ...
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... TYPICAL APPLICATION CONTROLLER OSCILLATOR FREQUENCY MEASUREMENT The measurement circuit below shows a SM1125ABV with built-in RC oscillator circuit and external RC oscillator components capacitor C When ST is switched the oscillator starts and outputs a pulse on MTO. The output pulse is counted DD using a frequency counter Switch ...
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... Green Sleeves 10 Jesu joy of mans desiring 11 Mickey Mouse March 12 Its a small world Note. The copyrights of music described in this list have been the public domain or being managed by JASRAC in Japan. SM1125ABV Composer Komuro Tetsuya Yoshida Miwa Komekome club Sakurai Kazutoshi Michael George – ...
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... Customers are requested not to export or re-export, directly or indirectly, the Products to any country or any entity not in compliance with or in violation of the national export administration laws, treaties, orders and regulations. Customers are requested appropriately take steps to obtain required permissions or approvals from appropriate government agencies. SM1125ABV SEIKO NPC CORPORATION 15-6, Nihombashi-kabutocho, Chuo-ku, ...