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STM32F103RCT6 データシート(PDF) 13 Page - STMicroelectronics |
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STM32F103RCT6 データシート(HTML) 13 Page - STMicroelectronics |
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13 / 130 page  STM32F103xC, STM32F103xD, STM32F103xE Description Doc ID 14611 Rev 8 13/130 Figure 2. Clock tree 1. When the HSI is used as a PLL clock input, the maximum system clock frequency that can be achieved is 64 MHz. 2. For the USB function to be available, both HSE and PLL must be enabled, with the USBCLK at 48 MHz. 3. To have an ADC conversion time of 1 µs, APB2 must be at 14 MHz, 28 MHz or 56 MHz. HSE OSC 4-16 MHz OSC_IN OSC_OUT OSC32_IN OSC32_OUT LSE OSC 32.768 kHz HSI RC 8 MHz LSI RC 40 kHz to Independent Watchdog (IWDG) PLL x2, x3, x4 PLLMUL HSE = High Speed External clock signal LSE = Low Speed External clock signal LSI = Low Speed Internal clock signal HSI = High Speed Internal clock signal Legend: MCO Clock Output Main PLLXTPRE /2 ..., x16 AHB Prescaler /1, 2..512 /2 PLLCLK HSI HSE APB1 Prescaler /1, 2, 4, 8, 16 ADC Prescaler /2, 4, 6, 8 ADCCLK PCLK1 HCLK PLLCLK to AHB bus, core, memory and DMA USBCLK to USB interface USB Prescaler /1, 1.5 to ADC1, 2 or 3 LSE LSI HSI /128 /2 HSI HSE peripherals to APB1 Peripheral Clock Enable (20 bits) Enable (6 bits) Peripheral Clock APB2 Prescaler /1, 2, 4, 8, 16 PCLK2 TIM1 & 8 timers to TIM1 and TIM8 peripherals to APB2 Peripheral Clock Enable (15 bits) Enable (2 bit) Peripheral Clock 48 MHz 72 MHz max 72 MHz 72 MHz max 36 MHz max to RTC PLLSRC SW MCO CSS to Cortex System timer /8 Clock Enable (4 bits) SYSCLK max RTCCLK RTCSEL[1:0] TIMxCLK TIMXCLK IWDGCLK SYSCLK FCLK Cortex free running clock /2 TIM2,3,4,5,6,7 to TIM2,3,4,5,6 and 7 To SDIO AHB interface Peripheral clock enable HCLK/2 to FSMC FSMCCLK to SDIO Peripheral clock enable Peripheral clock enable to I2S3 to I2S2 Peripheral clock enable Peripheral clock enable I2S3CLK I2S2CLK SDIOCLK ai14752b If (APB1 prescaler =1) x1 else x2 If (APB2 prescaler =1) x1 else x2 FLITFCLK to Flash programming interface |
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