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MPC8306EC датащи(PDF) 64 Page - Freescale Semiconductor, Inc |
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MPC8306EC датащи(HTML) 64 Page - Freescale Semiconductor, Inc |
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64 / 76 page ![]() MPC8306 PowerQUICC II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 0 64 Freescale Semiconductor Clocking NOTE Core VCO frequency = core frequency VCO divider. The VCO divider (RCWL[COREPLL[0:1]]), must be set properly so that the core VCO frequency is in the range of 400–800 MHz. 22.4 QUICC Engine PLL Configuration The QUICC Engine PLL is controlled by the RCWL[CEPMF] and RCWL[CEPDF] parameters. Table 58 shows the multiplication factor encodings for the QUICC Engine PLL. 10 0001 0 1:1 8 11 0001 0 1:1 8 00 0001 1 1.5:1 2 01 0001 1 1.5:1 4 10 0001 1 1.5:1 8 11 0001 1 1.5:1 8 00 0010 0 2:1 2 01 0010 0 2:1 4 10 0010 0 2:1 8 11 0010 0 2:1 8 00 0010 1 2.5:1 2 01 0010 1 2.5:1 4 10 0010 1 2.5:1 8 11 0010 1 2.5:1 8 00 0011 0 3:1 2 01 0011 0 3:1 4 10 0011 0 3:1 8 11 0011 0 3:1 8 Table 58. QUICC Engine PLL Multiplication Factors RCWL[CEPMF] RCWL[CEPDF] QUICC Engine PLL Multiplication Factor = RCWL[CEPMF]/ (1 + RCWL[CEPDF) 00000–00001 0 Reserved 00010 0 2 00011 0 3 00100 0 4 Table 57. e300 Core PLL Configuration (continued) RCWL[COREPLL] core_clk : csb_clk Ratio VCO Divider 0-1 2-5 6 |
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