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ST40RA 数据表(PDF) 34 Page - STMicroelectronics |
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ST40RA 数据表(HTML) 34 Page - STMicroelectronics |
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34 / 94 page ![]() ADCS 7260755H STMicroelectronics 34/94 ST40RA 6 Clock generation 6.2 Recommended operating modes 6.3 Clocks and registers at start up Mode for CLOCKGENA and CLOCKGENB PLL frequency (MHz) ST40RA clock domain frequencies (MHz) PLLA (mode) PLLB (mode) PLLA PLLB CPU_ CLK STBUS_ CLK PER_ CLK LMI_ CLK EMI_SS_ CLK PCI_SS_ CLK Recommended reset configuration 0 - 200 - 100 50 25 50 50 50 Alternate reset configuration 1 - 266 - 133 88 44 88 88 88 2 - 300 - 150 100 50 100 100 100 3 - 332 - 166 111 66 111 111 111 Recommended operating modes 2 - 300 - 150 100 100 100 100 100 3 - 332 - 166 83 83 83 83 83 Low power configuration with clocks enabled (programmable after reset) A6 bypass - 27 - 13.5 6.75 6.75 6.75 6.75 6.75 Table 14: Supported operating frequencies Reset mode Reset mode MODE[2:0] CLOCKGENA .PLL1CR1 reset value CLOCKGENA core frequency (PLL1) fPLL/2 CLK1 CPU_ CLK CLK2 STBUS_ CLK CLK3 PER_ CLK CLK4 LMI_ CLK 0 000 0x7939 8612 200 MHz 100 1 1/2 1/4 1/2 1 001 0x7939 B112 266 MHz 133 1 2/3 1/3 2/3 2 010 0x7938 6412 300 MHz 150 1 2/3 1/3 2/3 3 011 0x7938 7B14 332 MHz 166 1 2/3 1/3 2/3 4 100 0x7938 8612 400 MHz 200 1 1/2 1/4 1/2 5 101 0x7938 A712 500 MHz 250 1 1/2 1/4 1/2 6 110 0x0938 0000 0 MHz 0 1 1/2 1/2 1/2 7 111 0x0939 8612 200 MHz 100 1/2 1/4 1/4 1/4 Table 15: CLOCKGENA PLL1 reset values |
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