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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MC68331TS датащи(PDF) 74 Page - Freescale Semiconductor, Inc |
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MC68331TS датащи(HTML) 74 Page - Freescale Semiconductor, Inc |
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74 / 84 page  74 MC68331TS/D Figure 18 PWM Unit Block Diagram 6.3 Pulse-Width Modulator The pulse-width modulation submodule has two output pins. The outputs are periodic waveforms con- trolled by a single frequency whose duty cycles can be independently selected and modified by user software. Each PWM can be independently programmed to run in fast or slow mode. The PWM unit has its own 16-bit free-running counter, which is clocked by an output of the nine-stage prescaler (the same prescaler used by the capture/compare unit) or by the clock input pin, PCLK. 16/32 PWM BLOCK BLOCK ZERO DETECTOR 16-BIT COUNTER PWMA REGISTER PWMB REGISTER PWMABUF REGISTER PWMBBUF REGISTER "A" COMPARATOR "B" COMPARATOR "A" MULTIPLEXER "B" MULTIPLEXER SFB BIT SFA BIT F1A BIT F1B BIT LATCH R S LATCH R S ZERO DETECTOR PWMB PIN PWMA PIN FROM PRESCALER CLOCK [14:0] 16-BIT DATA BUS Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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