peripheral clock gating register
| TIMERS_CLK_EN | reg_timers_clk_en |
| SPI01_CLK_EN | reg_spi01_clk_en |
| UART_CLK_EN | reg_uart_clk_en |
| WDG_CLK_EN | reg_wdg_clk_en |
| I2S0_CLK_EN | reg_i2s0_clk_en |
| UART1_CLK_EN | reg_uart1_clk_en |
| SPI2_CLK_EN | reg_spi2_clk_en |
| I2C_EXT0_CLK_EN | reg_ext0_clk_en |
| UHCI0_CLK_EN | reg_uhci0_clk_en |
| RMT_CLK_EN | reg_rmt_clk_en |
| PCNT_CLK_EN | reg_pcnt_clk_en |
| LEDC_CLK_EN | reg_ledc_clk_en |
| UHCI1_CLK_EN | reg_uhci1_clk_en |
| TIMERGROUP_CLK_EN | reg_timergroup_clk_en |
| EFUSE_CLK_EN | reg_efuse_clk_en |
| TIMERGROUP1_CLK_EN | reg_timergroup1_clk_en |
| SPI3_CLK_EN | reg_spi3_clk_en |
| PWM0_CLK_EN | reg_pwm0_clk_en |
| EXT1_CLK_EN | reg_ext1_clk_en |
| TWAI_CLK_EN | reg_can_clk_en |
| PWM1_CLK_EN | reg_pwm1_clk_en |
| I2S1_CLK_EN | reg_i2s1_clk_en |
| SPI2_DMA_CLK_EN | reg_spi2_dma_clk_en |
| USB_DEVICE_CLK_EN | reg_usb_device_clk_en |
| UART_MEM_CLK_EN | reg_uart_mem_clk_en |
| PWM2_CLK_EN | reg_pwm2_clk_en |
| PWM3_CLK_EN | reg_pwm3_clk_en |
| SPI3_DMA_CLK_EN | reg_spi3_dma_clk_en |
| APB_SARADC_CLK_EN | reg_apb_saradc_clk_en |
| SYSTIMER_CLK_EN | reg_systimer_clk_en |
| ADC2_ARB_CLK_EN | reg_adc2_arb_clk_en |
| SPI4_CLK_EN | reg_spi4_clk_en |