diff --git a/components/driver/deprecated/driver/mcpwm.h b/components/driver/deprecated/driver/mcpwm.h
index a85c1951bb5..b39532295eb 100644
--- a/components/driver/deprecated/driver/mcpwm.h
+++ b/components/driver/deprecated/driver/mcpwm.h
@@ -72,6 +72,7 @@ esp_err_t mcpwm_init( mcpwm_unit_t mcpwm_num, mcpwm_timer_t timer_num, const mcp
  *        This will override default resolution of group(=10,000,000).
  *        This WILL NOT automatically update frequency and duty. Call mcpwm_set_frequency() and mcpwm_set_duty() manually
  *        to set them back.
+ *        The group resolution must be an integral multiple of timer resolution.
  *
  * @param mcpwm_num set MCPWM unit(0-1)
  * @param resolution set expected frequency resolution
@@ -88,6 +89,7 @@ esp_err_t mcpwm_group_set_resolution(mcpwm_unit_t mcpwm_num, unsigned long int r
  *        This WILL override default resolution of timer(=1,000,000).
  *        This WILL NOT automatically update frequency and duty. Call mcpwm_set_frequency() and mcpwm_set_duty() manually
  *        to set them back.
+ *        The group resolution must be an integral multiple of timer resolution.
  *
  * @param mcpwm_num set MCPWM unit(0-1)
  * @param timer_num set timer number(0-2) of MCPWM, each MCPWM unit has 3 timers
diff --git a/components/driver/deprecated/mcpwm_legacy.c b/components/driver/deprecated/mcpwm_legacy.c
index 1d9577b8c08..2e2bb402a9d 100644
--- a/components/driver/deprecated/mcpwm_legacy.c
+++ b/components/driver/deprecated/mcpwm_legacy.c
@@ -284,6 +284,7 @@ esp_err_t mcpwm_set_duty(mcpwm_unit_t mcpwm_num, mcpwm_timer_t timer_num, mcpwm_
     uint32_t set_duty = mcpwm_ll_timer_get_peak(hal->dev, timer_num, false) * duty / 100;
     mcpwm_ll_operator_set_compare_value(hal->dev, op, cmp, set_duty);
     mcpwm_ll_operator_enable_update_compare_on_tez(hal->dev, op, cmp, true);
+    mcpwm_ll_operator_enable_update_compare_on_tep(hal->dev, op, cmp, true);
     mcpwm_critical_exit(mcpwm_num);
     return ESP_OK;
 }
@@ -305,6 +306,7 @@ esp_err_t mcpwm_set_duty_in_us(mcpwm_unit_t mcpwm_num, mcpwm_timer_t timer_num,
     uint64_t compare_val = real_timer_clk_hz * duty_in_us / 1000000;
     mcpwm_ll_operator_set_compare_value(hal->dev, op, cmp, (uint32_t)compare_val);
     mcpwm_ll_operator_enable_update_compare_on_tez(hal->dev, op, cmp, true);
+    mcpwm_ll_operator_enable_update_compare_on_tep(hal->dev, op, cmp, true);
     mcpwm_critical_exit(mcpwm_num);
     return ESP_OK;
 }