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MPC875 数据表(PDF) 22 Page - Freescale Semiconductor, Inc |
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MPC875 数据表(HTML) 22 Page - Freescale Semiconductor, Inc |
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22 / 84 page  MPC875/MPC870 Hardware Specifications, Rev. 3.0 22 PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE Freescale Semiconductor Bus Signal Timing B33a CLKOUT rising edge to GPL valid, as requested by control bit GxT3 in the corresponding word in the UPM (MAX = 0.25 × B1 + 6.80) 7.60 14.30 6.30 13.00 3.80 10.50 3.13 10.00 ns B34 A(0:31), BADDR(28:30), and D(0:31) to CS valid, as requested by control bit CST4 in the corresponding word in the UPM (MIN = 0.25 × B1 - 2.00) 5.60 — 4.30 — 1.80 — 1.13 — ns B34a A(0:31), BADDR(28:30), and D(0:31) to CS valid, as requested by control bit CST1 in the corresponding word in the UPM (MIN = 0.50 × B1 – 2.00) 13.20 — 10.50 — 5.60 — 4.25 — ns B34b A(0:31), BADDR(28:30), and D(0:31) to CS valid, as requested by CST2 in the corresponding word in UPM (MIN = 0.75 × B1 – 2.00) 20.70 — 16.70 — 9.40 — 6.80 — ns B35 A(0:31), BADDR(28:30) to CS valid, as requested by control bit BST4 in the corresponding word in the UPM (MIN = 0.25 × B1 – 2.00) 5.60 — 4.30 — 1.80 — 1.13 — ns B35a A(0:31), BADDR(28:30), and D(0:31) to BS valid, as requested by BST1 in the corresponding word in the UPM (MIN = 0.50 × B1 – 2.00) 13.20 — 10.50 — 5.60 — 4.25 — ns B35b A(0:31), BADDR(28:30), and D(0:31) to BS valid, as requested by control bit BST2 in the corresponding word in the UPM (MIN = 0.75 × B1 – 2.00) 20.70 — 16.70 — 9.40 — 7.40 — ns B36 A(0:31), BADDR(28:30), and D(0:31) to GPL valid, as requested by control bit GxT4 in the corresponding word in the UPM (MIN = 0.25 × B1 – 2.00) 5.60 — 4.30 — 1.80 — 1.13 — ns B37 UPWAIT valid to CLKOUT falling edge 8 (MIN = 0.00 × B1 + 6.00) 6.00 — 6.00 — 6.00 — 6.00 — ns B38 CLKOUT falling edge to UPWAIT valid 8 (MIN = 0.00 × B1 + 1.00) 1.00 — 1.00 — 1.00 — 1.00 — ns B39 AS valid to CLKOUT rising edge 9 (MIN = 0.00 × B1 + 7.00) 7.00 — 7.00 — 7.00 — 7.00 — ns B40 A(0:31), TSIZ(0:1), RD/WR, BURST, valid to CLKOUT rising edge (MIN = 0.00 × B1 + 7.00) 7.00 — 7.00 — 7.00 — 7.00 — ns B41 TS valid to CLKOUT rising edge (setup time) (MIN = 0.00 × B1 + 7.00) 7.00 — 7.00 — 7.00 — 7.00 — ns Table 10. Bus Operation Timings (continued) Num Characteristic 33 MHz 40 MHz 66 MHz 80 MHz Unit Min Max Min Max Min Max Min Max |
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