ST STM32F31xx

UM1581
Reset and clock control (RCC)
DocID023800 Rev 1
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18.2.8.2 RCC_I2CCLKConfig
Function Name
void RCC_I2CCLKConfig ( uint32_t RCC_I2CCLK)
Function Description
Configures the I2C clock (I2CCLK).
Parameters
 RCC_I2CCLK : defines the I2C clock source. This clock is
derived from the HSI or System clock. This parameter can be
one of the following values:
 RCC_I2CxCLK_HSI : I2Cx clock = HSI
 RCC_I2CxCLK_SYSCLK : I2Cx clock = System Clock
(x can be 1 or 2).
Return values
 None.
Notes
 None.
18.2.8.3 RCC_TIMCLKConfig
Function Name
void RCC_TIMCLKConfig ( uint32_t RCC_TIMCLK)
Function Description
Configures the TIM1 and TIM8 clock sources(TIMCLK).
Parameters
 RCC_TIMCLK : defines the TIMx clock source. This
parameter can be one of the following values:
 RCC_TIMxCLK_HCLK : TIMx clock = APB high speed
clock (doubled frequency when prescaled)
 RCC_TIMxCLK_PLLCLK : TIMx clock = PLL output
(running up to 144 MHz) (x can be 1 or 8).
Return values
 None.
Notes
 The configuration of the TIMx clock source is only possible
when the SYSCLK = PLL and HCLK and PCLK2 clocks are
not divided in respect to SYSCLK
 If one of the previous conditions is missed, the TIM clock
source configuration is lost and calling again this function
becomes mandatory.