diff --git a/APP/peripheral_main.c b/APP/peripheral_main.c
index 6792fc1..5af650b 100644
--- a/APP/peripheral_main.c
+++ b/APP/peripheral_main.c
@@ -229,7 +229,10 @@ int main(void)
 #if (defined(DCDC_ENABLE)) && (DCDC_ENABLE == TRUE)
     PWR_DCDCCfg(ENABLE);
 #endif
+    // 32Mhz/10ppm/10pF
     HSECFG_Capacitance(HSECap_18p);
+    // USE 32Mhz/10ppm/12pF
+    // HSECFG_Capacitance(HSECap_20p);
     SetSysClock(CLK_SOURCE_HSE_PLL_62_4MHz);
 
 #if (defined(HAL_SLEEP)) && (HAL_SLEEP == TRUE)