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@@ -766,8 +766,10 @@ esp_err_t uart_get_collision_flag(uart_port_t uart_num, bool* collision_flag);
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* The character that triggers wakeup is not received by UART (i.e. it can not
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* be obtained from UART FIFO). Depending on the baud rate, a few characters
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* after that will also not be received. Note that when the chip enters and exits
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- * light sleep mode, APB frequency will be changing. To make sure that UART has
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- * correct baud rate all the time, select UART_SCLK_REF_TICK or UART_SCLK_XTAL as UART clock source in uart_config_t::source_clk.
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+ * light sleep mode, APB frequency will be changing. To ensure that UART has
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+ * correct Baud rate all the time, it is necessary to select a source clock which has
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+ * a fixed frequency and remains active during sleep. For the supported clock sources
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+ * of the chips, please refer to `uart_sclk_t` or `soc_periph_uart_clk_src_legacy_t`
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*
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* @note in ESP32, the wakeup signal can only be input via IO_MUX (i.e.
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* GPIO3 should be configured as function_1 to wake up UART0,
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Linda