diff --git a/src/device/dcd.h b/src/device/dcd.h
index 143a2de3..487ddb3b 100644
--- a/src/device/dcd.h
+++ b/src/device/dcd.h
@@ -106,6 +106,12 @@ void dcd_set_config (uint8_t rhport, uint8_t config_num);
 // Wake up host
 void dcd_remote_wakeup(uint8_t rhport);
 
+// disconnect by disabling internal pull-up resistor on D+/D-
+void dcd_disconnect(uint8_t rhport) TU_ATTR_WEAK;
+
+// connect by enabling internal pull-up resistor on D+/D-
+void dcd_connect(uint8_t rhport) TU_ATTR_WEAK;
+
 //--------------------------------------------------------------------+
 // Endpoint API
 //--------------------------------------------------------------------+
diff --git a/src/device/usbd.h b/src/device/usbd.h
index beeec7e1..817af20e 100644
--- a/src/device/usbd.h
+++ b/src/device/usbd.h
@@ -65,6 +65,20 @@ static inline bool tud_ready(void)
 // Remote wake up host, only if suspended and enabled by host
 bool tud_remote_wakeup(void);
 
+static inline bool tud_disconnect(void)
+{
+  TU_VERIFY(dcd_disconnect);
+  dcd_disconnect(TUD_OPT_RHPORT);
+  return true;
+}
+
+static inline bool tud_connect(void)
+{
+  TU_VERIFY(dcd_connect);
+  dcd_connect(TUD_OPT_RHPORT);
+  return true;
+}
+
 // Carry out Data and Status stage of control transfer
 // - If len = 0, it is equivalent to sending status only
 // - If len > wLength : it will be truncated