diff --git a/firmware/target/arm/as3525/sd-as3525.c b/firmware/target/arm/as3525
index 0afe735..3913279 100644
--- a/firmware/target/arm/as3525/sd-as3525.c
+++ b/firmware/target/arm/as3525/sd-as3525.c
@@ -877,7 +877,18 @@ void sd_enable(bool on)
         else
             _buttonlight_off();
 #endif /* HAVE_BUTTON_LIGHT */
+    MCI_POWER(1) = MCI_POWER_UP | (MCI_VDD_3_0);  /*  OF Setting  */
+    mci_delay();
+
+    MCI_POWER(1) |= MCI_POWER_ON;
+    mci_delay();
 #endif /* HAVE_MULTIDRIVE */
+    MCI_POWER(0) = MCI_POWER_UP | (MCI_VDD_3_0);  /*  OF Setting  */
+    mci_delay();
+
+    MCI_POWER(0) |= MCI_POWER_ON;
+    mci_delay();
+
         sd_enabled = true;

 #if defined(HAVE_HOTSWAP) && defined (HAVE_ADJUSTABLE_CPU_VOLTAGE)
@@ -901,6 +912,7 @@ void sd_enable(bool on)
         sd_enabled = false;

 #ifdef HAVE_MULTIDRIVE
+        MCI_POWER(1) = 0;
 #ifdef HAVE_BUTTON_LIGHT
         CCU_IO &= ~(1<<2);           /* XPD is general purpose IO (b3:2 = 00) *
         if (buttonlight_is_on)
@@ -909,6 +921,7 @@ void sd_enable(bool on)
         /* Disable MCI clk for uSD */
         CGU_PERI &= ~CGU_MCI_CLOCK_ENABLE;
 #endif /* HAVE_MULTIDRIVE */
+        MCI_POWER(0) = 0;

         /*  Disable both NAF_CLOCK & IDE clk for internal SD */
         CGU_PERI &= ~CGU_NAF_CLOCK_ENABLE;