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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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AT89C5132-ROTIL 데이터시트(PDF) 172 Page - ATMEL Corporation |
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AT89C5132-ROTIL 데이터시트(HTML) 172 Page - ATMEL Corporation |
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172 / 182 page  172 4173E–USB–09/07 AT89C5132 23.3.8 Flash Memory 23.3.8.1 Definition of Symbols Table 121. Flash Memory Timing Symbol Definitions 23.3.8.2 Timings Table 122. Flash Memory AC Timing VDD = 2.7 to 3.3V, TA = -40° to +85°C 23.3.8.3 Waveforms Figure 23-21. Flash Memory – ISP Waveforms Note: 1. ISP must be driven through a pull-down resistor (see Section “In-system Programming”, page 158). Figure 23-22. Flash Memory – Internal Busy Waveforms 23.3.9 External Clock Drive and Logic Level References 23.3.9.1 Definition of Symbols Table 123. External Clock Timing Symbol Definitions Signals Conditions S ISP L Low R RST V Valid B FBUSY flag X No Longer Valid Symbol Parameter Min Typ Max Unit T SVRL Input ISP Valid to RST Edge 50 ns T RLSX Input ISP Hold after RST Edge 50 ns T BHBL FLASH Internal Busy (Programming) Time 10 ms N FCY Number of Flash Write Cycles 100K Cycle T FDR Flash Data Retention Time 10 Year RST T SVRL ISP(1) T RLSX FBUSY bit T BHBL Signals Conditions C Clock H High L Low X No Longer Valid |
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