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MPC885CZP133 数据表(PDF) 21 Page - Freescale Semiconductor, Inc |
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MPC885CZP133 数据表(HTML) 21 Page - Freescale Semiconductor, Inc |
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21 / 92 page ![]() MPC885/MPC880 Hardware Specifications, Rev. 3 21 Freescale Semiconductor Bus Signal Timing B31 CLKOUT falling edge to CS valid, as requested by control bit CST4 in the corresponding word in the UPM (MAX = 0.00 × B1 + 6.00) 1.50 6.00 1.50 6.00 1.50 6.00 1.50 6.00 ns B31a CLKOUT falling edge to CS valid, as requested by control bit CST1 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 B31b CLKOUT rising edge to CS valid, as requested by control bit CST2 in the corresponding word in the UPM (MAX = 0.00 × B1 + 8.00) 1.50 8.00 1.50 8.00 1.50 8.00 1.50 8.00 ns B31c CLKOUT rising edge to CS valid, as requested by control bit CST3 in the corresponding word in the UPM (MAX = 0.25 × B1 + 6.30) 7.60 13.80 6.30 12.50 3.80 10.00 3.13 9.40 ns B31d CLKOUT falling edge to CS valid, as requested by control bit CST1 in the corresponding word in the UPM EBDF = 1 (MAX = 0.375 × B1 + 6.6) 13.30 18.00 11.30 16.00 7.60 12.30 4.69 11.30 ns B32 CLKOUT falling edge to BS valid, as requested by control bit BST4 in the corresponding word in the UPM (MAX = 0.00 × B1 + 6.00) 1.50 6.00 1.50 6.00 1.50 6.00 1.50 6.00 ns B32a CLKOUT falling edge to BS valid, as requested by control bit BST1 in the corresponding word in the UPM, EBDF = 0 (MAX = 0.25 × B1 + 6.80) 7.60 14.30 6.30 13.00 3.80 10.50 3.13 10.00 ns B32b CLKOUT rising edge to BS valid, as requested by control bit BST2 in the corresponding word in the UPM (MAX = 0.00 × B1 + 8.00) 1.50 8.00 1.50 8.00 1.50 8.00 1.50 8.00 ns B32c CLKOUT rising edge to BS valid, as requested by control bit BST3 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 B32d CLKOUT falling edge to BS valid, as requested by control bit BST1 in the corresponding word in the UPM, EBDF = 1 (MAX = 0.375 × B1 + 6.60) 13.30 18.00 11.30 16.00 7.60 12.30 4.49 11.30 ns B33 CLKOUT falling edge to GPL valid, as requested by control bit GxT4 in the corresponding word in the UPM (MAX = 0.00 × B1 + 6.00) 1.50 6.00 1.50 6.00 1.50 6.00 1.50 6.00 ns Table 9. 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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