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MPC8313ECVRGDFB 数据表(PDF) 79 Page - Freescale Semiconductor, Inc |
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MPC8313ECVRGDFB 数据表(HTML) 79 Page - Freescale Semiconductor, Inc |
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79 / 100 page ![]() MPC8313E PowerQUICC™ II Pro Processor Hardware Specifications, Rev. 2.1 Freescale Semiconductor 79 Clocking Table 65 provides the operating frequencies for the MPC8313E TEPBGAII under recommended operating conditions (see Table 2). 20.1 System PLL Configuration The system PLL is controlled by the RCWL[SPMF] parameter. Table 66 shows the multiplication factor encodings for the system PLL. Table 64. Configurable Clock Units Unit Default Frequency Options TSEC1 csb_clk Off, csb_clk, csb_clk/2, csb_clk/3 TSEC2 csb_clk Off, csb_clk, csb_clk/2, csb_clk/3 Security Core, I2C, SAP, TPR csb_clk Off, csb_clk, csb_clk/2, csb_clk/3 USB DR csb_clk Off, csb_clk, csb_clk/2, csb_clk/3 PCI and DMA complex csb_clk Off, csb_clk Table 65. Operating Frequencies for TEPBGAII Characteristic1 Maximum Operating Frequency Unit e300 core frequency ( core_clk)333 MHz Coherent system bus frequency ( csb_clk)167 MHz DDR1/2 memory bus frequency (MCK)2 167 MHz Local bus frequency (LCLK n)3 66 MHz PCI input frequency (SYS_CLK_IN or PCI_CLK) 66 MHz Notes: 1. The SYS_CLK_IN frequency, RCWL[SPMF], and RCWL[COREPLL] settings must be chosen such that the resulting csb_clk, MCK, LCLK[0:1], and core_clk frequencies do not exceed their respective maximum or minimum operating frequencies. The value of SCCR[ENCCM] and SCCR[USBDRCM] must be programmed such that the maximum internal operating frequency of the security core and USB modules do not exceed their respective value listed in this table. 2. The DDR data rate is 2x the DDR memory bus frequency. 3. The local bus frequency is 1/2, 1/4, or 1/8 of the lbc_clk frequency (depending on LCCR[CLKDIV]), which is in turn, 1x or 2x the csb_clk frequency (depending on RCWL[LBCM]). Table 66. System PLL Multiplication Factors RCWL[SPMF] System PLL Multiplication Factor 0000 Reserved 0001 Reserved 0010 × 2 |
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