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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ADMCF327 датащи(PDF) 4 Page - Analog Devices |
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ADMCF327 датащи(HTML) 4 Page - Analog Devices |
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4 / 36 page  ADMCF327 –4– REV. 0 TIMING PARAMETERS Parameter Min Max Unit Clock Signals Signal tCK is defined as 0.5 tCKIN. The ADMCF327 uses an input clock with a frequency equal to half the instruction rate; a 10 MHz input clock (which is equivalent to 100 ns) yields a 50 ns processor cycle (equivalent to 20 MHz). When tCK values are within the range of 0.5 tCKIN period, they should be substituted for all relevant timing parameters to obtain specification value. Example: tCKH = 0.5 tCK – 10 ns = 0.5 (50 ns) – 10 ns = 15 ns. Timing Requirements: tCKIN CLKIN Period 100 150 ns tCKIL CLKIN Width Low 20 ns tCKIH CLKIN Width High 20 ns Switching Characteristics: tCKL CLKOUT Width Low 0.5 tCK – 10 ns tCKH CLKOUT Width High 0.5 tCK – 10 ns tCKOH CLKIN High to CLKOUT High 0 20 ns Control Signals Timing Requirement: tRSP RESET Width Low 5 tCK 1 ns PWM Shutdown Signals Timing Requirement: tPWMTPW PWMTRIP Width Low tCK ns NOTES 1Applies after power-up sequence is complete. CLKIN CLKOUT tCKL tCKIL tCKH tCKIH tCKIN tCKOH Figure 1. Clock Signals |
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