USART1EN=B_0x0, SPI1EN=B_0x0, USBFSEN=B_0x0, TIM1EN=B_0x0
RCC APB2 peripheral clock register
| TIM1EN | TIM1 clock enable Set and reset by software. 0 (B_0x0): TIM1 peripheral clock disabled (default after reset) 1 (B_0x1): TIM1 peripheral clock enabled |
| SPI1EN | SPI1 clock enable Set and reset by software. 0 (B_0x0): SPI1 peripheral clock disabled (default after reset) 1 (B_0x1): SPI1 peripheral clock enabled |
| USART1EN | USART1 clock enable Set and reset by software. 0 (B_0x0): USART1 peripheral clock disabled (default after reset) 1 (B_0x1): USART1 peripheral clock enabled |
| USBFSEN | USBFS clock enable Set and reset by software. 0 (B_0x0): USBFS peripheral clock disabled (default after reset) 1 (B_0x1): USBFS peripheral clock enabled |