System peripheral clock (for hardware accelerators) enable register
| TIMERS_CLK_EN | Set this bit to enable clock of timers. |
| SPI01_CLK_EN | Set this bit to enable clock of SPI0 and SPI1. |
| UART_CLK_EN | Set this bit to enable clock of UART0. |
| WDG_CLK_EN | Set this bit to enable clock of WDG. |
| I2S0_CLK_EN | Set this bit to enable clock of I2S0. |
| UART1_CLK_EN | Set this bit to enable clock of UART1. |
| SPI2_CLK_EN | Set this bit to enable clock of SPI2. |
| I2C_EXT0_CLK_EN | Set this bit to enable clock of I2C EXT0. |
| UHCI0_CLK_EN | Set this bit to enable clock of UHCI0. |
| RMT_CLK_EN | Set this bit to enable clock of remote controller. |
| PCNT_CLK_EN | Set this bit to enable clock of pulse count. |
| LEDC_CLK_EN | Set this bit to enable clock of LED PWM. |
| UHCI1_CLK_EN | Set this bit to enable clock of UHCI1. |
| TIMERGROUP_CLK_EN | Set this bit to enable clock of timer group0. |
| EFUSE_CLK_EN | Set this bit to enable clock of eFuse. |
| TIMERGROUP1_CLK_EN | Set this bit to enable clock of timer group1. |
| SPI3_CLK_EN | Set this bit to enable clock of SPI3. |
| PWM0_CLK_EN | Set this bit to enable clock of PWM0. |
| I2C_EXT1_CLK_EN | Set this bit to enable clock of I2C EXT1. |
| TWAI_CLK_EN | Set this bit to enable clock of CAN. |
| PWM1_CLK_EN | Set this bit to enable clock of PWM1. |
| I2S1_CLK_EN | Set this bit to enable clock of I2S1. |
| SPI2_DMA_CLK_EN | Set this bit to enable clock of SPI2 DMA. |
| USB_CLK_EN | Set this bit to enable clock of USB. |
| UART_MEM_CLK_EN | Set this bit to enable clock of UART memory. |
| PWM2_CLK_EN | Set this bit to enable clock of PWM2. |
| PWM3_CLK_EN | Set this bit to enable clock of PWM3. |
| SPI3_DMA_CLK_EN | Set this bit to enable clock of SPI3 DMA. |
| APB_SARADC_CLK_EN | Set this bit to enable clock of SAR ADC. |
| SYSTIMER_CLK_EN | Set this bit to enable clock of system timer. |
| ADC2_ARB_CLK_EN | Set this bit to enable clock of aribiter of ADC2. |
| SPI4_CLK_EN | Set this bit to enable clock of SPI4. |