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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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CSTCC10.0MGA датащи(PDF) 28 Page - STMicroelectronics |
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CSTCC10.0MGA датащи(HTML) 28 Page - STMicroelectronics |
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28 / 153 page  ST72334J/N, ST72314J/N, ST72124J 28/153 9.2 RESET SEQUENCE MANAGER (RSM) 9.2.1 Introduction The reset sequence manager includes three RE- SET sources as shown in Figure 15: s External RESET source pulse s Internal LVD RESET (Low Voltage Detection) s Internal WATCHDOG RESET These sources act on the RESET pin and it is al- ways kept low during the delay phase. The RESET service routine vector is fixed at ad- dresses FFFEh-FFFFh in the ST7 memory map. The basic RESET sequence consists of 3 phases as shown in Figure 14: s Delay depending on the RESET source s 4096 CPU clock cycle delay s RESET vector fetch The 4096 CPU clock cycle delay allows the oscil- lator to stabilise and ensures that recovery has taken place from the Reset state. The RESET vector fetch phase duration is 2 clock cycles. Figure 14. RESET Sequence Phases Figure 15. Reset Block Diagram RESET DELAY INTERNAL RESET 4096 CLOCK CYCLES FETCH VECTOR fCPU RESET RON VDD WATCHDOG RESET LVD RESET INTERNAL RESET |
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