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STM32F303VC 数据表(PDF) 18 Page - STMicroelectronics |
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STM32F303VC 数据表(HTML) 18 Page - STMicroelectronics |
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18 / 133 page  Functional overview STM32F302xx/STM32F303xx 18/133 Doc ID 023353 Rev 5 Figure 3. Clock tree /32 4-32 MHz HSE OSC OSC_IN OSC_OUT OSC32_IN OSC32_OUT 8 MHz HSI RC IWDGCLK to IWDG PLL x2,x3,.. x16 PLLMUL MCO Main clock output AHB /2 PLLCLK HSI HSE APB1 prescaler /1,2,4,8,16 HCLK PLLCLK to AHB bus, core, memory and DMA LSE LSI HSI HSI HSE to RTC PLLSRC SW MCO /8 SYSCLK RTCCLK RTCSEL[1:0] SYSCLK to TIM 2,3,4,6,7 If (APB1 prescaler =1) x1 else x2 FLITFCLK to Flash programming interface LSI to I2Cx (x = 1,2) to U(S)ARTx (x = 2..5) LSE HSI SYSCLK /2 PCLK1 SYSCLK HSI PCLK1 MS19989V4 to I2Sx (x = 2,3) USBCLK to USB interface to cortex System timer FHCLK Cortex free running clock to APB1 peripherals AHB prescaler /1,2,..512 CSS /2,/3,... /16 LSE OSC 32.768kHz LSI RC 40kHz USB prescaler /1,1.5 APB2 prescaler /1,2,4,8,16 to TIM 15,16,17 If (APB2 prescaler =1) x1 else x2 to USART1 LSE HSI SYSCLK PCLK2 PCLK2 to APB2 peripherals TIM1/8 ADC Prescaler /1,2,4 to ADCxy (xy = 12, 34) ADC Prescaler /1,2,4,6,8,10,12,16, 32,64,128,256 I2SSRC SYSCLK Ext. clock I2S_CKIN x2 |
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