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MPC826XACVR Datasheet(PDF) 27 Page - Freescale Semiconductor, Inc |
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MPC826XACVR Datasheet(HTML) 27 Page - Freescale Semiconductor, Inc |
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27 / 52 page  MPC8260A PowerQUICC™ II Integrated Communications Processor Hardware Specifications, Rev. 1.1 Freescale Semiconductor 27 Clock Configuration Modes 3.2.1 PCI Host Mode The frequencies listed in Table 16 and Table 17 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. I Table 17 describes all possible clock configurations when using the MPC8265 or the MPC8266’s internal PCI bridge in host mode. Table 16. Clock Default Configurations in PCI Host Mode (MODCK_HI = 0000) MODCK[1–3] (1) Notes: 1. Assumes MODCK_HI = 0000. Input Clock Frequency (Bus) CPM Multiplication Factor CPM Frequency Core Multiplication Factor Core Frequency PCI Division Factor(2) 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.) Refer to Table 15. PCI Frequency2 000 66 MHz 2 133 MHz 2.5 166 MHz 2/4 66/33 MHz 001 66 MHz 2 133 MHz 3 200 MHz 2/4 66/33 MHz 010 66 MHz 2.5 166 MHz 3 200 MHz 3/6 55/28 MHz 011 66 MHz 2.5 166 MHz 3.5 233 MHz 3/6 55/28 MHz 100 66 MHz 2.5 166 MHz 4 266 MHz 3/6 55/28 MHz 101 66 MHz 3 200 MHz 3 200 MHz 3/6 66/33 MHz 110 66 MHz 3 200 MHz 3.5 233 MHz 3/6 66/33 MHz 111 66 MHz 3 200 MHz 4 266 MHz 3/6 66/33 MHz Table 17. Clock Configuration Modes in PCI Host Mode MODCK_H – MODCK[1–3] Input Clock Frequency(1) (Bus) CPM Multiplication Factor CPM Frequency Core Multiplication Factor Core Frequency PCI Division Factor(2) PCI Frequency2 0001_000 33 MHz 3 100 MHz 5 166 MHz 3/6 33/16 MHz 0001_001 33 MHz 3 100 MHz 6 200 MHz 3/6 33/16 MHz 0001_010 33 MHz 3 100 MHz 7 233 MHz 3/6 33/16 MHz 0001_011 33 MHz 3 100 MHz 8 266 MHz 3/6 33/16 MHz 0010_000 33 MHz 4 133 MHz 5 166 MHz 4/8 33/16 MHz 0010_001 33 MHz 4 133 MHz 6 200 MHz 4/8 33/16 MHz 0010_010 33 MHz 4 133 MHz 7 233 MHz 4/8 33/16 MHz 0010_011 33 MHz 4 133 MHz 8 266 MHz 4/8 33/16 MHz 0011_000(3) 33 MHz 5 166 MHz 5 166 MHz 5 33 MHz 0011_0013 33 MHz 5 166 MHz 6 200 MHz 5 33 MHz |
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