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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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AT83SND1CXXX-ROTIL 데이터시트(PDF) 187 Page - ATMEL Corporation |
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AT83SND1CXXX-ROTIL 데이터시트(HTML) 187 Page - ATMEL Corporation |
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187 / 212 page  187 4109J–8051–10/06 AT8xC51SND1C 22.3.1.3 Waveforms Figure 22-8. External Program Bus Cycle - Read Waveforms 22.3.2 External Data 8-bit Bus Cycles 22.3.2.1 Definition of Symbols Table 152. External Data 8-bit Bus Cycles Timing Symbol Definitions 22.3.2.2 Timings Test conditions: capacitive load on all pins= 50 pF. Table 153. External Data 8-bit Bus Cycle - Read AC Timings VDD = 2.7 to 3.3 V, TA = -40 to +85°C T PLIV P2 P0 PSEN ALE T LHLL T PLPH Instruction In A15:8 TLLPL A7:0 A15:8 T AVLL TLLAX T PLAZ D7:0 T PXIX TPXIZ D7:0 T PXAV Instruction In A7:0 D7:0 Signals Conditions A Address H High D Data In L Low LALE V Valid Q Data Out X No Longer Valid RRD ZFloating WWR Symbol Parameter Variable Clock Standard Mode Variable Clock X2 Mode Unit Min Max Min Max TCLCL Clock Period 50 50 ns TLHLL ALE Pulse Width 2·TCLCL-15 TCLCL-15 ns TAVLL Address Valid to ALE Low TCLCL-20 0.5·TCLCL-20 ns TLLAX Address hold after ALE Low TCLCL-20 0.5·TCLCL-20 ns TLLRL ALE Low to RD Low 3·TCLCL-30 1.5·TCLCL-30 ns |
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