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CSTCC10.0MGA Datasheet(PDF) 116 Page - STMicroelectronics |
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CSTCC10.0MGA Datasheet(HTML) 116 Page - STMicroelectronics |
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116 / 153 page ![]() ST72334J/N, ST72314J/N, ST72124J 116/153 16.5 CLOCK AND TIMING CHARACTERISTICS Subject to general operating conditions for VDD, fOSC, and TA. 16.5.1 General Timings 16.5.2 External Clock Source Figure 67. Typical Application with an External Clock Source Notes: 1. Data based on typical application software. 2. Time measured between interrupt event and interrupt vector fetch. ∆t c(INST) is the number of tCPU cycles needed to finish the current instruction execution. 3. Data based on design simulation and/or technology characteristics, not tested in production. Symbol Parameter Conditions Min Typ 1) Max Unit tc(INST) Instruction cycle time 2 3 12 tCPU fCPU=8MHz 250 375 1500 ns tv(IT) Interrupt reaction time 2) tv(IT) = ∆tc(INST) + 10 10 22 tCPU fCPU=8MHz 1.25 2.75 µs Symbol Parameter Conditions Min Typ Max Unit VOSC1H OSC1 input pin high level voltage see Figure 67 0.7xVDD VDD V VOSC1L OSC1 input pin low level voltage VSS 0.3xVDD tw(OSC1H) tw(OSC1L) OSC1 high or low time 3) 15 ns tr(OSC1) tf(OSC1) OSC1 rise or fall time 3) 15 IL OSCx Input leakage current VSS≤VIN≤VDD ±1 µA OSC1 OSC2 fOSC EXTERNAL ST72XXX CLOCK SOURCE Not connected internally VOSC1L VOSC1H tr(OSC1) tf(OSC1) tw(OSC1H) tw(OSC1L) IL 90% 10% |
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