RTCPRE=B_0x0, STOPKERWUCK=B_0x0, MCO1PRE=B_0x0, MCO1SEL=B_0x0, MCO2SEL=B_0x0, TIMPRE=B_0x0, MCO2PRE=B_0x0, SW=B_0x0
RCC clock configuration register1
| SW | system clock and trace clock switch 0 (B_0x0): HSI selected as system clock (hsi_ck) (default after reset) 1 (B_0x1): CSI selected as system clock (csi_ck) 2 (B_0x2): HSE selected as system clock (hse_ck) 3 (B_0x3): PLL1 selected as system clock (pll1_p_ck for sys_ck) |
| SWS | system clock switch status 1 (B_0x1): CSI used as system clock (csi_ck) 2 (B_0x2): HSE used as system clock (hse_ck) 3 (B_0x3): PLL1 used as system clock (pll1_p_ck) |
| STOPWUCK | system clock selection after a wakeup from system Stop 1 (B_0x1): CSI selected as wakeup clock from system Stop |
| STOPKERWUCK | kernel clock selection after a wakeup from system Stop 0 (B_0x0): HSI selected as wakeup clock from system Stop (default after reset) 1 (B_0x1): CSI selected as wakeup clock from system Stop |
| RTCPRE | HSE division factor for RTC clock 0 (B_0x0): no clock (default after reset) 1 (B_0x1): no clock 2 (B_0x2): HSE/2 3 (B_0x3): HSE/3 4 (B_0x4): HSE/4 62 (B_0x3E): HSE/62 63 (B_0x3F): HSE/63 |
| TIMPRE | timers clocks prescaler selection 0 (B_0x0): The timers kernel clock is equal to rcc_hclk1 if PPRE1 or PPRE2 corresponds to a division by 1 or 2, else it is equal to 2 x Fless thansub>rcc_pclk1less than/sub> or 2 x Fless thansub>rcc_pclk2less than/sub> (default after reset) 1 (B_0x1): The timers kernel clock is equal to 2 x Fless thansub>rcc_pclk1less than/sub> or 2 x Fless thansub>rcc_pclk2less than/sub> if PPRE1 or PPRE2 corresponds to a division by 1, 2 or 4, else it is equal to 4 x Fless thansub>rcc_pclk1less than/sub> or 4 x Fless thansub>rcc_pclk2less than/sub> |
| MCO1PRE | MCO1 prescaler 0 (B_0x0): prescaler disabled (default after reset) 1 (B_0x1): division by 1 (bypass) 2 (B_0x2): division by 2 3 (B_0x3): division by 3 4 (B_0x4): division by 4 15 (B_0xF): division by 15 |
| MCO1SEL | Microcontroller clock output 1 0 (B_0x0): HSI clock selected (hsi_ck) (default after reset) 1 (B_0x1): LSE oscillator clock selected (lse_ck) 2 (B_0x2): HSE clock selected (hse_ck) 3 (B_0x3): PLL1 clock selected (pll1_q_ck) 4 (B_0x4): HSI48 clock selected (hsi48_ck) |
| MCO2PRE | MCO2 prescaler 0 (B_0x0): prescaler disabled (default after reset) 1 (B_0x1): division by 1 (bypass) 2 (B_0x2): division by 2 3 (B_0x3): division by 3 4 (B_0x4): division by 4 15 (B_0xF): division by 15 |
| MCO2SEL | microcontroller clock output 2 0 (B_0x0): system clock selected (sys_ck) (default after reset) 1 (B_0x1): PLL2 oscillator clock selected (pll2_p_ck) 2 (B_0x2): HSE clock selected (hse_ck) 3 (B_0x3): PLL1 clock selected (pll1_p_ck) 4 (B_0x4): CSI clock selected (csi_ck) 5 (B_0x5): LSI clock selected (lsi_ck) |