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MPC8309CVMADFC bảng dữ liệu(PDF) 70 Page - NXP Semiconductors |
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MPC8309CVMADFC bảng dữ liệu(HTML) 70 Page - NXP Semiconductors |
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70 / 81 page ![]() MPC8309 PowerQUICC II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 3 70 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. 23.6 QUICC Engine PLL Configuration The QUICC Engine PLL is controlled by the RCWL[CEPMF] and RCWL[CEPDF] parameters. The following table shows the multiplication factor encodings for the QUICC Engine PLL. The RCWL[CEVCOD] denotes the QUICC Engine PLL VCO internal frequency as shown in the following table. 01 0011 0 3:1 4 10 0011 0 3:1 8 11 0011 0 3:1 8 Table 61. 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 00101 0 5 00110 0 6 00111 0 7 01000 0 8 01001–11111 0 Reserved Table 62. QUICC Engine PLL VCO Divider RCWL[CEVCOD] VCO Divider 00 2 01 4 10 8 11 Reserved Table 60. e300 Core PLL Configuration (continued) RCWL[COREPLL] core_clk : csb_clk Ratio VCO Divider 0-1 2-5 6 |
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