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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MPC8548CVTAQJB датащи(PDF) 45 Page - Freescale Semiconductor, Inc |
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MPC8548CVTAQJB датащи(HTML) 45 Page - Freescale Semiconductor, Inc |
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45 / 144 page  MPC8548E PowerQUICC™ III Integrated Processor Hardware Specifications, Rev. 6 Freescale Semiconductor 45 Local Bus Figure 23 through Figure 28 show the local bus signals. Figure 23. Local Bus Signals (PLL Enabled) Table 42 describes the timing parameters of the local bus interface at BVDD = 3.3 V with PLL disabled. Table 42. Local Bus Timing Parameters—PLL Bypassed Parameter Symbol1 Min Max Unit Notes Local bus cycle time tLBK 12 — ns 2 Local bus duty cycle tLBKH/tLBK 43 57 % — Internal launch/capture clock to LCLK delay tLBKHKT 2.3 4.4 ns 8 Input setup to local bus clock (except LGTA/LUPWAIT) tLBIVKH1 6.2 — ns 4, 5 LGTA/LUPWAIT input setup to local bus clock tLBIVKL2 6.1 — ns 4, 5 Input hold from local bus clock (except LGTA/LUPWAIT) tLBIXKH1 –1.8 — ns 4, 5 LGTA/LUPWAIT input hold from local bus clock tLBIXKL2 –1.3 — ns 4, 5 LALE output transition to LAD/LDP output transition (LATCH hold time) tLBOTOT 1.5 — ns 6 Local bus clock to output valid (except LAD/LDP and LALE) tLBKLOV1 — –0.3 ns — Local bus clock to data valid for LAD/LDP tLBKLOV2 — –0.1 ns 4 Output Signals: LA[27:31]/LBCTL/LBCKE/LOE/ LSDA10/LSDWE/LSDRAS/ LSDCAS/LSDDQM[0:3] tLBKHOV1 tLBKHOV2 tLBKHOV3 LSYNC_IN Input Signals: LAD[0:31]/LDP[0:3] Output (Data) Signals: LAD[0:31]/LDP[0:3] Output (Address) Signal: LAD[0:31] LALE tLBIXKH1 tLBIVKH1 tLBIVKH2 tLBIXKH2 tLBKHOX1 tLBKHOZ1 tLBKHOX2 tLBKHOZ2 Input Signal: LGTA tLBOTOT tLBKHOZ2 tLBKHOX2 tLBKHOV4 LUPWAIT |
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