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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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HC705C9AGRS/D датащи(PDF) 138 Page - NXP Semiconductors |
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HC705C9AGRS/D датащи(HTML) 138 Page - NXP Semiconductors |
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138 / 157 page  General Release Specification Control Timing MC68HC705C9A — Rev. 2.0 Electrical Specifications Figure 12-4. TCAP Timing Relationships Table 12-4. Control Timing (VDD = 3.3 V) (1) Characteristic Symbol Min Max Unit Frequency of Operation Crystal External Clock fOSC — DC 2.0 2.0 MHz Internal Operating Frequency (fOSC ÷ 2) Crystal External Clock fOP — DC 1.0 1.0 MHz Cycle Time tCYC 1000 — ns Crystal Oscillator Start-up Time tOXOV — 100 ms Stop Recovery Start-up Time (Crystal Oscillator) tILCH — 100 ms RESET Pulse Width tRL 1.5 — tCYC Timer Resolution(2) Input Capture Pulse Width Input Capture Pulse Period tRESL tTH, tTL tTLTL 4.0 125 (3) — — — tCYC ns tCYC Interrupt Pulse Width Low (Edge-Triggered) tILIH 250 — ns Interrupt Pulse Period tILIL (4) —tCYC OSC1 Pulse Width tOH,tOL 200 — ns NOTES: 1. V DD = 3.3Vdc ± 0.3 Vdc, VSS = 0 Vdc, TA = –40 to +85 °C, unless otherwise noted 2. Because a 2-bit prescaler in the timer must count four internal cycles (t CYC), this is the limiting minimum factor in determining the timer resolution. 3. The minimum period t TLTL should not be less than the number of cycle times it takes to execute the capture interrupt service routine plus 24 t CYC. 4. The minimum t ILIL should not be less than the number of cycle times it takes to execute the interrupt service routine plus 19 t CYC. t TLTL * TCAP PIN t TH * t TL * * Refer to timer resolution data in Table 12-3 and Table 12-4. Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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