diff --git a/components/driver/include/driver/mcpwm_cap.h b/components/driver/include/driver/mcpwm_cap.h
index d40ef2fd1a..f1bb030720 100644
--- a/components/driver/include/driver/mcpwm_cap.h
+++ b/components/driver/include/driver/mcpwm_cap.h
@@ -94,6 +94,18 @@ esp_err_t mcpwm_capture_timer_start(mcpwm_cap_timer_handle_t cap_timer);
  */
 esp_err_t mcpwm_capture_timer_stop(mcpwm_cap_timer_handle_t cap_timer);
 
+/**
+ * @brief Get MCPWM capture timer resolution, in Hz
+ *
+ * @param[in] cap_timer MCPWM capture timer, allocated by `mcpwm_new_capture_timer()`
+ * @param[out] out_resolution Returned capture timer resolution, in Hz
+ * @return
+ *      - ESP_OK: Get capture timer resolution successfully
+ *      - ESP_ERR_INVALID_ARG: Get capture timer resolution failed because of invalid argument
+ *      - ESP_FAIL: Get capture timer resolution failed because of other error
+ */
+esp_err_t mcpwm_capture_timer_get_resolution(mcpwm_cap_timer_handle_t cap_timer, uint32_t *out_resolution);
+
 /**
  * @brief MCPWM Capture timer sync phase configuration
  */
diff --git a/components/driver/mcpwm/mcpwm_cap.c b/components/driver/mcpwm/mcpwm_cap.c
index ef6e3b2c2a..7a80545c54 100644
--- a/components/driver/mcpwm/mcpwm_cap.c
+++ b/components/driver/mcpwm/mcpwm_cap.c
@@ -185,6 +185,13 @@ esp_err_t mcpwm_capture_timer_stop(mcpwm_cap_timer_handle_t cap_timer)
     return ESP_OK;
 }
 
+esp_err_t mcpwm_capture_timer_get_resolution(mcpwm_cap_timer_handle_t cap_timer, uint32_t *out_resolution)
+{
+    ESP_RETURN_ON_FALSE(cap_timer && out_resolution, ESP_ERR_INVALID_ARG, TAG, "invalid argument");
+    *out_resolution = cap_timer->resolution_hz;
+    return ESP_OK;
+}
+
 static esp_err_t mcpwm_capture_channel_register_to_timer(mcpwm_cap_channel_t *cap_channel, mcpwm_cap_timer_t *cap_timer)
 {
     int cap_chan_id = -1;
diff --git a/components/driver/test_apps/mcpwm/main/test_mcpwm_cap.c b/components/driver/test_apps/mcpwm/main/test_mcpwm_cap.c
index 911f2e8dcc..7da9603480 100644
--- a/components/driver/test_apps/mcpwm/main/test_mcpwm_cap.c
+++ b/components/driver/test_apps/mcpwm/main/test_mcpwm_cap.c
@@ -74,7 +74,7 @@ TEST_CASE("mcpwm_capture_ext_gpio", "[mcpwm]")
     printf("install mcpwm capture timer\r\n");
     mcpwm_cap_timer_handle_t cap_timer = NULL;
     mcpwm_capture_timer_config_t cap_timer_config = {
-        .clk_src = MCPWM_CAPTURE_CLK_SRC_APB,
+        .clk_src = MCPWM_CAPTURE_CLK_SRC_DEFAULT,
         .group_id = 0,
     };
     TEST_ESP_OK(mcpwm_new_capture_timer(&cap_timer_config, &cap_timer));
@@ -115,8 +115,8 @@ TEST_CASE("mcpwm_capture_ext_gpio", "[mcpwm]")
     gpio_set_level(cap_gpio, 0);
     vTaskDelay(pdMS_TO_TICKS(100));
     printf("capture value: Pos=%"PRIu32", Neg=%"PRIu32"\r\n", cap_value[0], cap_value[1]);
-    // Capture timer is clocked from APB by default
-    uint32_t clk_src_res = esp_clk_apb_freq();
+    uint32_t clk_src_res;
+    mcpwm_capture_timer_get_resolution(cap_timer, &clk_src_res);
     TEST_ASSERT_UINT_WITHIN(100000, clk_src_res / 10, cap_value[1] - cap_value[0]);
 
     printf("uninstall capture channel and timer\r\n");
@@ -183,8 +183,8 @@ TEST_CASE("mcpwm_capture_software_catch", "[mcpwm]")
     TEST_ASSERT_EQUAL(2, test_callback_data.cap_data_index);
     uint32_t delta = test_callback_data.cap_data[1] - test_callback_data.cap_data[0];
     esp_rom_printf("duration=%u ticks\r\n", delta);
-    // Capture timer is clocked from APB by default
-    uint32_t clk_src_res = esp_clk_apb_freq();
+    uint32_t clk_src_res;
+    mcpwm_capture_timer_get_resolution(cap_timer, &clk_src_res);
     TEST_ASSERT_UINT_WITHIN(80000, clk_src_res / 100, delta);
 
     printf("uninstall capture channel and timer\r\n");
diff --git a/docs/en/api-reference/peripherals/mcpwm.rst b/docs/en/api-reference/peripherals/mcpwm.rst
index 4760534731..d9e5032f7d 100644
--- a/docs/en/api-reference/peripherals/mcpwm.rst
+++ b/docs/en/api-reference/peripherals/mcpwm.rst
@@ -806,7 +806,7 @@ The MCPWM capture channel can inform the user when there's a valid edge detected
 
 - :cpp:member:`mcpwm_capture_event_callbacks_t::on_cap` sets callback function for the capture channel when a valid edge is detected.
 
-The callback function will provide event specific data of type :cpp:type:`mcpwm_capture_event_data_t`, so that you can get the the edge of the capture signal in :cpp:member:`mcpwm_capture_event_data_t::cap_edge` and the count value of that moment in :cpp:member:`mcpwm_capture_event_data_t::cap_value`.
+The callback function will provide event specific data of type :cpp:type:`mcpwm_capture_event_data_t`, so that you can get the edge of the capture signal in :cpp:member:`mcpwm_capture_event_data_t::cap_edge` and the count value of that moment in :cpp:member:`mcpwm_capture_event_data_t::cap_value`. To convert the capture count into timestamp, you need to know the resolution of the capture timer by calling :cpp:func:`mcpwm_capture_timer_get_resolution`.
 
 The callback function is called within the ISR context, so is should **not** attempt to block (e.g., make sure that only FreeRTOS APIs with ``ISR`` suffix is called within the function).