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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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MPC8270ZUI 데이터시트(PDF) 22 Page - Freescale Semiconductor, Inc |
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MPC8270ZUI 데이터시트(HTML) 22 Page - Freescale Semiconductor, Inc |
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22 / 80 page  MPC8280 PowerQUICC II™ Family Hardware Specifications, Rev. 1.7 22 Freescale Semiconductor AC Electrical Characteristics Figure 10 shows signal behavior for all parity modes (including ECC, RMW parity, and standard parity). Figure 10. Parity Mode Diagram Figure 11 shows signal behavior in MEMC mode. Figure 11. MEMC Mode Diagram NOTE Generally, all MPC8280 bus and system output signals are driven from the rising edge of the input clock (CLKin). Memory controller signals, however, trigger on four points within a CLKin cycle. Each cycle is divided by four internal ticks: T1, T2, T3, and T4. T1 always occurs at the rising edge, and T3 at the falling edge, of CLKin. However, the spacing of T2 and T4 depends on the PLL clock ratio selected, as shown in Table 13. CLKin DATA bus, ECC, and PARITY mode Pipeline mode— DP mode output signal sp13 sp10 sp14a sp10 Pipeline mode— sp10 DP mode input signal sp14 sp10 DATA bus, ECC, and PARITY mode DP mode input signal input signals input signals sp30 sp33b sp13a CLKin V_CLK Memory controller signals sp34/sp30 |
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