diff --git a/components/soc/esp32c6/include/soc/soc_caps.h b/components/soc/esp32c6/include/soc/soc_caps.h
index ddcb0f886f..52d9b8f7da 100644
--- a/components/soc/esp32c6/include/soc/soc_caps.h
+++ b/components/soc/esp32c6/include/soc/soc_caps.h
@@ -203,7 +203,10 @@
 
 /*-------------------------- RTCIO CAPS --------------------------------------*/
 #define SOC_RTCIO_PIN_COUNT                 8
-#define SOC_RTCIO_INPUT_OUTPUT_SUPPORTED    1 // The target has separate LP(RTC) IOMUX
+#define SOC_RTCIO_INPUT_OUTPUT_SUPPORTED 1  /* This macro indicates that the target has separate RTC IOMUX hardware feature,
+                                             * so it supports unique IOMUX configuration (including IE, OE, PU, PD, DRV etc.)
+                                             * when the pins are switched to RTC function.
+                                             */
 #define SOC_RTCIO_HOLD_SUPPORTED            1
 #define SOC_RTCIO_WAKE_SUPPORTED            1
 
diff --git a/components/soc/esp32s2/include/soc/soc_caps.h b/components/soc/esp32s2/include/soc/soc_caps.h
index 7ea6a91c03..669ff5773e 100644
--- a/components/soc/esp32s2/include/soc/soc_caps.h
+++ b/components/soc/esp32s2/include/soc/soc_caps.h
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2020-2022 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2020-2023 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -249,7 +249,10 @@
 
 /*-------------------------- RTCIO CAPS --------------------------------------*/
 #define SOC_RTCIO_PIN_COUNT   22
-#define SOC_RTCIO_INPUT_OUTPUT_SUPPORTED 1 // The target has separate RTC IOMUX
+#define SOC_RTCIO_INPUT_OUTPUT_SUPPORTED 1  /* This macro indicates that the target has separate RTC IOMUX hardware feature,
+                                             * so it supports unique IOMUX configuration (including IE, OE, PU, PD, DRV etc.)
+                                             * when the pins are switched to RTC function.
+                                             */
 #define SOC_RTCIO_HOLD_SUPPORTED 1
 #define SOC_RTCIO_WAKE_SUPPORTED 1
 
diff --git a/components/soc/esp32s3/include/soc/soc_caps.h b/components/soc/esp32s3/include/soc/soc_caps.h
index 0a6206dab3..6cd12bd56e 100644
--- a/components/soc/esp32s3/include/soc/soc_caps.h
+++ b/components/soc/esp32s3/include/soc/soc_caps.h
@@ -278,7 +278,10 @@
 
 /*-------------------------- RTCIO CAPS --------------------------------------*/
 #define SOC_RTCIO_PIN_COUNT   22
-#define SOC_RTCIO_INPUT_OUTPUT_SUPPORTED 1 // The target has separate RTC IOMUX
+#define SOC_RTCIO_INPUT_OUTPUT_SUPPORTED 1  /* This macro indicates that the target has separate RTC IOMUX hardware feature,
+                                             * so it supports unique IOMUX configuration (including IE, OE, PU, PD, DRV etc.)
+                                             * when the pins are switched to RTC function.
+                                             */
 #define SOC_RTCIO_HOLD_SUPPORTED 1
 #define SOC_RTCIO_WAKE_SUPPORTED 1