CPU2 APB1 peripheral clock enable register 1 [dual core device only]
| TIM2EN | CPU2 TIM2 timer clock enable |
| RTCAPBEN | CPU2 RTC APB clock enable |
| SPI2S2EN | CPU2 SPI2S2 clock enable |
| USART2EN | CPU2 USART2 clock enable |
| I2C1EN | CPU2 I2C1 clocks enable |
| I2C2EN | CPU2 I2C2 clocks enable |
| I2C3EN | CPU2 I2C3 clocks enable |
| DAC1EN | CPU2 DAC1 clock enable |
| LPTIM1EN | CPU2 Low power timer 1 clocks enable |