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MPC8271VR 数据表(PDF) 23 Page - Motorola, Inc |
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MPC8271VR 数据表(HTML) 23 Page - Motorola, Inc |
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23 / 56 page ![]() 23 MPC8272 PowerQUICC II™ Family Hardware Specifications MOTOROLA PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE Clock Configuration Modes Clock Configuration Modes Table 15. Clock Configurations for PCI Host Mode (PCI_MODCK=0) 1, 2 Mode 3 Bus Clock (MHz) CPM Multiplication Factor 4 CPM Clock (MHz) CPU Multiplication Factor 5 CPU Clock (MHz) PCI Division Factor PCI Clock (MHz) MODCK_H- MODCK[1-3] Low High Low High Low High Low High Default Modes (MODCK_H=0000) 0000_000 50.0 66.7 2 100.0 133.3 2.5 125.0 166.7 2 50.0 66.7 0000_001 50.0 66.7 2 100.0 133.3 3 150.0 200.0 2 50.0 66.7 0000_010 60.0 80.0 2.5 150.0 200.0 3 180.0 240.0 3 50.0 66.7 0000_011 71.4 80.0 2.5 178.6 200.0 3.5 250.0 280.0 3 59.5 66.7 0000_100 62.5 80.0 2.5 156.3 200.0 4 250.0 320.0 3 52.1 66.7 0000_101 50.0 66.7 3 150.0 200.0 3 150.0 200.0 3 50.0 66.7 0000_110 PCI host mode (PCI_MODCK=1) only (refer to Table 16) 0000_111 62.5 66.7 3 187.5 200.0 4 250.0 266.6 3 62.5 66.7 Full Configuration Modes 0001_000 50.0 66.7 3 150.0 200.0 5 250.0 333.3 3 50.0 66.7 0001_001 50.0 66.7 3 150.0 200.0 6 300.0 400.0 3 50.0 66.7 0001_010 50.0 66.7 3 150.0 200.0 7 350.0 466.6 3 50.0 66.7 0001_011 50.0 66.7 3 150.0 200.0 8 400.0 533.3 3 50.0 66.7 0010_000 50.0 66.7 4 200.0 266.6 5 250.0 333.3 4 50.0 66.7 0010_001 50.0 66.7 4 200.0 266.6 6 300.0 400.0 4 50.0 66.7 0010_010 50.0 66.7 4 200.0 266.6 7 350.0 466.6 4 50.0 66.7 0010_011 50.0 66.7 4 200.0 266.6 8 400.0 533.3 4 50.0 66.7 0010_100 75.0 100.0 4 300.0 400.0 5 375.0 500.0 6 50.0 66.7 0010_101 75.0 100.0 4 300.0 400.0 5.5 412.5 549.9 6 50.0 66.7 0010_110 75.0 100.0 4 300.0 400.0 6 450.0 599.9 6 50.0 66.7 0011_000 50.0 66.7 5 250.0 333.3 5 250.0 333.3 5 50.0 66.7 0011_001 50.0 66.7 5 250.0 333.3 6 300.0 400.0 5 50.0 66.7 0011_010 50.0 66.7 5 250.0 333.3 7 350.0 466.6 5 50.0 66.7 0011_011 50.0 66.7 5 250.0 333.3 8 400.0 533.3 5 50.0 66.7 0100_000 Reserved 0100_001 50.0 66.7 6 300.0 400.0 6 300.0 400.0 6 50.0 66.7 Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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