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MPC8610EC датащи(PDF) 75 Page - Freescale Semiconductor, Inc |
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MPC8610EC датащи(HTML) 75 Page - Freescale Semiconductor, Inc |
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75 / 96 page ![]() Hardware Design Considerations MPC8610 Integrated Host Processor Hardware Specifications, Rev. 0 Freescale Semiconductor 75 3.1.3 e600 Core to MPX/Platform Clock PLL Ratio The clock ratio between the e600 core and the platform clock is determined by the binary value of LBCTL, LALE, LGPL2/LOE/LFRE, DIU_LD4 (cfg_core_pll[0:3]–reset config) signals at power up. Table 58 describes the supported ratios. Note that cfg_core_speed must be pulled low if the core frequency is 800 MHz or below. 3.1.4 Frequency Options 3.1.4.1 SYSCLK and Platform Frequency Options Table 59 shows the expected frequency options for SYSCLK and platform frequencies. Table 58. e600 Core/Platform Clock Ratios Binary Value of LBCTL, LALE, LGPL2/LOE/LFRE, DIU_LD4 Signals e600 core: MPX/Platform Ratio 1000 2:1 1010 2.5:1 1100 3:1 1110 3.5:1 0000 4:1 0010 4.5:1 All Others Reserved Table 59. SYSCLK and Platform Frequency Options Platform: SYSCLK Ratio SYSCLK (MHz) 33.33 66.66 83.33 100.00 111.11 133.33 Platform/MPX Frequency (MHz)1 1 Platform/MPX Frequency values are shown rounded down to the nearest whole number (decimal place accuracy removed) 3:1 333 400 4:1 333 400 533 5:1 333 500 6:1 400 500 8:1 533 10:1 333 12:1 400 16:1 533 |
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