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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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MPC8264AVR 数据表(PDF) 27 Page - Motorola, Inc |
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MPC8264AVR 数据表(HTML) 27 Page - Motorola, Inc |
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27 / 48 page  MOTOROLA MPC826xA (HiP4) Family Hardware Specifications 27 Clock Configuration Modes 1.3.2.2 PCI Agent Mode The frequencies listed in Table 17 and Table 18 are for the purpose of illustration only. Users must select a mode and input bus frequency so that the resulting configuration does not exceed the frequency rating of the user’s device. Table 18 describes all possible clock configurations when using the MPC8265 or the MPC8266’s internal PCI bridge in agent mode. Table 17. Clock Default Configurations in PCI Agent Mode (MODCK_HI = 0000) MODCK[1–3]1 1 Assumes MODCK_HI = 0000. Input Clock Frequency (PCI)2 CPM Multiplication Factor2 2 The frequency depends on the value of PCI_MODCK. If PCI_MODCK is high (logic ‘1’), the PCI frequency is divided by 2 (33 instead of 66 MHz, etc.) and the CPM multiplication factor is multiplied by 2. Refer to Table 14. CPM Frequency Core Multiplication Factor Core Frequency3 3 Core frequency = (60x bus frequency)(core multiplication factor) Bus Division Factor 60x Bus Frequency4 4 Bus frequency = CPM frequency / bus division factor 000 66/33 MHz 2/4 133 MHz 2.5 166 MHz 2 66 MHz 001 66/33 MHz 2/4 133 MHz 3 200 MHz 2 66 MHz 010 66/33 MHz 3/6 200 MHz 3 200 MHz 3 66 MHz 011 66/33 MHz 3/6 200 MHz 4 266 MHz 3 66 MHz 100 66/33 MHz 3/6 200 MHz 3 240 MHz 2.5 80 MHz 101 66/33 MHz 3/6 200 MHz 3.5 280 MHz 2.5 80 MHz 110 66/33 MHz 4/8 266 MHz 3.5 300 MHz 3 88 MHz 111 66/33 MHz 4/8 266 MHz 3 300 MHz 2.5 100 MHz Table 18. Clock Configuration Modes in PCI Agent Mode MODCK_H – MODCK[1–3] Input Clock Frequency (PCI)1,2 CPM Multiplication Factor1 CPM Frequency Core Multiplication Factor Core Frequency3 Bus Division Factor 60x Bus Frequency4 0001_001 66/33 MHz 2/4 133 MHz 5 166 MHz 4 33 MHz 0001_010 66/33 MHz 2/4 133 MHz 6 200 MHz 4 33 MHz 0001_011 66/33 MHz 2/4 133 MHz 7 233 MHz 4 33 MHz 0001_100 66/33 MHz 2/4 133 MHz 8 266 MHz 4 33 MHz 0010_001 50/25 MHz 3/6 150 MHz 3 180 MHz 2.5 60 MHz 0010_010 50/25 MHz 3/6 150 MHz 3.5 210 MHz 2.5 60 MHz 0010_011 50/25 MHz 3/6 150 MHz 4 240 MHz 2.5 60 MHz 0010_100 50/25 MHz 3/6 150 MHz 4.5 270 MHz 2.5 60 MHz 0011_000 66/33 MHz 2/4 133 MHz 2.5 110MHz 3 44 MHz 0011_001 66/33 MHz 2/4 133 MHz 3 132 MHz 3 44 MHz |
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