Datasheet

Table Of Contents
Application block diagrams STM32F405xx, STM32F407xx
190/202 DocID022152 Rev 8
Figure 99. RMII with a 25 MHz crystal and PHY with PLL
1. f
HCLK
must be greater than 25 MHz.
2. The 25 MHz (PHY_CLK) must be derived directly from the HSE oscillator, before the PLL block.
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