menu "ESP-Driver:UART Configurations" config UART_ISR_IN_IRAM bool "Place UART ISR function into IRAM" depends on !RINGBUF_PLACE_ISR_FUNCTIONS_INTO_FLASH select VFS_SELECT_IN_RAM if VFS_SUPPORT_SELECT default n help If this option is not selected, UART interrupt will be disabled for a long time and may cause data lost when doing spi flash operation. endmenu