diff --git a/edc20.c b/edc20.c
index 51e470b..ca19443 100644
--- a/edc20.c
+++ b/edc20.c
@@ -241,71 +241,6 @@ static void dev_mode_set_adc(uint8_t *ins, uint16_t size)
     }
 }
 
-void gpio_set_to_vo_mode_config(void)
-{
-    nrf_gpio_pin_set(Vout_FB_PIN);
-    nrf_gpio_pin_clear(Vout_IN_PIN);
-}
-
-void gpio_set_to_cv_or_cc_mode_config(void)
-{
-    nrf_gpio_pin_clear(Vout_FB_PIN);
-    nrf_gpio_pin_set(Vout_IN_PIN);
-}
-
-void switch_set_to_vo_mode_config(void)
-{
-    sw_t sw;
-    uint32_t sw_cnt;
-
-    sw_count(&sw_cnt);
-    sw_read(&sw);
-    sw.sw4 = 0;
-    sw.sw5 = 0;
-    sw.sw6 = 0;
-    sw.sw7 = 1;
-    NRF_LOG_INFO("sw.val= %08X", sw.val);
-    NRF_LOG_INFO("sw.sw7~sw4=%X %X %X %X", sw.sw7, sw.sw6, sw.sw5, sw.sw4);
-    NRF_LOG_INFO("sw.sw3~sw0=%X %X %X %X", sw.sw3, sw.sw2, sw.sw1, sw.sw0);
-    sw_write(sw);
-}
-
-void switch_set_to_cv_or_cc_mode_config(uint8_t vout_resistance_idx)
-{
-    sw_t sw;
-    uint32_t sw_cnt;
-
-    sw_count(&sw_cnt);
-    sw_read(&sw);
-
-    if (vout_resistance_idx == 0x00)
-    {
-        sw.sw4 = 0;
-        sw.sw5 = 0;
-        sw.sw6 = 1;
-        sw.sw7 = 0;
-    }
-    if (vout_resistance_idx == 0x01)
-    {
-        sw.sw4 = 0;
-        sw.sw5 = 1;
-        sw.sw6 = 0;
-        sw.sw7 = 0;
-    }
-    if (vout_resistance_idx == 0x02)
-    {
-        sw.sw4 = 1;
-        sw.sw5 = 0;
-        sw.sw6 = 0;
-        sw.sw7 = 0;
-    }
-
-    NRF_LOG_INFO("sw.val= %08X", sw.val);
-    NRF_LOG_INFO("sw.sw7~sw4=%X %X %X %X", sw.sw7, sw.sw6, sw.sw5, sw.sw4);
-    NRF_LOG_INFO("sw.sw3~sw0=%X %X %X %X", sw.sw3, sw.sw2, sw.sw1, sw.sw0);
-    sw_write(sw);
-}
-
 /*
     dev_mode_set_switch
     (1)0x3000FF9200
@@ -326,16 +261,6 @@ void switch_set_to_cv_or_cc_mode_config(uint8_t vout_resistance_idx)
                 00000111b = U13 S3&S2&S1    close(conductivity)
                 00001111b = U13 S4&S3&S2&S1 close(conductivity)
 
-    (3)0x3000FF9202
-            -func: vout mode config
-
-    (4)0x3000FF9203rr
-            -func: cv/cc mode config
-            -rr: Vout resistance idx    00h-02h
-                00h = the smallest Vout resistance  (100R)
-                01h = the middle Vout resistance    (10K)
-                02h = the largest Vout resistance   (1M)
-
     (3)0x3000FF9204gg
             -func: out_1 gain config
             -gg: out_1 resistance idx   00h-02h
@@ -347,8 +272,6 @@ static void dev_mode_set_switch(uint8_t *ins, uint16_t size)
 {
 #define SW_ITEM_INIT_SW        0x00
 #define SW_ITEM_WRITE_SW       0x01
-#define SW_ITEM_VOUT_MODE_CFG  0x02
-#define SW_ITEM_CV_CC_MODE_CFG 0x03
 #define SW_ITEM_SET_OUT_1_GAIN 0x04
 
     uint8_t sw_item = ins[4];
@@ -373,19 +296,6 @@ static void dev_mode_set_switch(uint8_t *ins, uint16_t size)
             break;
         }
 
-        case SW_ITEM_VOUT_MODE_CFG: {
-            switch_set_to_vo_mode_config();
-            gpio_set_to_vo_mode_config();
-            break;
-        }
-
-        case SW_ITEM_CV_CC_MODE_CFG: {
-            uint8_t vout_resistance_idx = ins[5];
-            switch_set_to_cv_or_cc_mode_config(vout_resistance_idx);
-            gpio_set_to_vo_mode_config();
-            break;
-        }
-
         case SW_ITEM_SET_OUT_1_GAIN: {
             uint8_t out_1_gain = ins[5];
             sw_t sw;