diff --git a/Inc/PwmFlagchip.h b/Inc/PwmFlagchip.h
index 394da97..8df705e 100644
--- a/Inc/PwmFlagchip.h
+++ b/Inc/PwmFlagchip.h
@@ -42,7 +42,7 @@ void Get_Set_Tpu_PwmCallback(tPwmFlagchip *env);
 
 #define TPU_FREQ (BUS_CLK / SCG_CLK_DIV)
 
-#define PWM_FREQ 100 // 100 Hz
+#define PWM_FREQ 50 // 100 Hz
 
 #define PERIOD_TICKS (TPU_FREQ / PWM_FREQ)