diff --git a/src/host/ehci/ehci.c b/src/host/ehci/ehci.c
index 13e9b0ed..3c02086c 100644
--- a/src/host/ehci/ehci.c
+++ b/src/host/ehci/ehci.c
@@ -326,6 +326,9 @@ bool hcd_edpt_xfer(uint8_t rhport, uint8_t dev_addr, uint8_t ep_addr, uint8_t *
 
     // attach TD
     qhd->qtd_overlay.next.address = (uint32_t) qtd;
+  }else
+  {
+    // TODO implement later
   }
 
   return true;
diff --git a/src/host/usbh.c b/src/host/usbh.c
index fd0e9ee1..f669cac0 100644
--- a/src/host/usbh.c
+++ b/src/host/usbh.c
@@ -122,11 +122,8 @@ static osal_queue_t _usbh_q;
 
 CFG_TUSB_MEM_SECTION TU_ATTR_ALIGNED(4) static uint8_t _usbh_ctrl_buf[CFG_TUSB_HOST_ENUM_BUFFER_SIZE];
 
-//------------- Reporter Task Data -------------//
-
 //------------- Helper Function Prototypes -------------//
 static inline uint8_t get_new_address(void);
-static inline uint8_t get_configure_number_for_device(tusb_desc_device_t* dev_desc);
 
 //--------------------------------------------------------------------+
 // PUBLIC API (Parameter Verification is required)
@@ -557,19 +554,22 @@ bool enum_task(hcd_event_t* event)
   TU_ASSERT(usbh_control_xfer(new_addr, &request, _usbh_ctrl_buf));
 
   // update device info  TODO alignment issue
-  new_dev->vendor_id       = ((tusb_desc_device_t*) _usbh_ctrl_buf)->idVendor;
-  new_dev->product_id      = ((tusb_desc_device_t*) _usbh_ctrl_buf)->idProduct;
-  new_dev->configure_count = ((tusb_desc_device_t*) _usbh_ctrl_buf)->bNumConfigurations;
+  tusb_desc_device_t const * desc_device = (tusb_desc_device_t const*) _usbh_ctrl_buf;
 
-  uint8_t const configure_selected = get_configure_number_for_device((tusb_desc_device_t*) _usbh_ctrl_buf);
-  TU_ASSERT(configure_selected <= new_dev->configure_count); // TODO notify application when invalid configuration
+  if (tuh_attach_cb) tuh_attach_cb((tusb_desc_device_t*) _usbh_ctrl_buf);
+
+  new_dev->vendor_id  = desc_device->idVendor;
+  new_dev->product_id = desc_device->idProduct;
+  TU_ASSERT(desc_device->bNumConfigurations > 0);
+
+  enum { CONFIG_NUM = 1 }; // default to use configuration 1
 
   //------------- Get 9 bytes of configuration descriptor -------------//
   TU_LOG2("Get 9 bytes of Configuration Descriptor\r\n");
   request = (tusb_control_request_t ) {
         .bmRequestType_bit = { .recipient = TUSB_REQ_RCPT_DEVICE, .type = TUSB_REQ_TYPE_STANDARD, .direction = TUSB_DIR_IN },
         .bRequest = TUSB_REQ_GET_DESCRIPTOR,
-        .wValue = (TUSB_DESC_CONFIGURATION << 8) | (configure_selected - 1),
+        .wValue = (TUSB_DESC_CONFIGURATION << 8) | (CONFIG_NUM - 1),
         .wIndex = 0,
         .wLength = 9
   };
@@ -591,7 +591,7 @@ bool enum_task(hcd_event_t* event)
   request = (tusb_control_request_t ) {
         .bmRequestType_bit = { .recipient = TUSB_REQ_RCPT_DEVICE, .type = TUSB_REQ_TYPE_STANDARD, .direction = TUSB_DIR_OUT },
         .bRequest = TUSB_REQ_SET_CONFIGURATION,
-        .wValue = configure_selected,
+        .wValue = CONFIG_NUM,
         .wIndex = 0,
         .wLength = 0
   };
@@ -702,17 +702,4 @@ static inline uint8_t get_new_address(void)
   return CFG_TUSB_HOST_DEVICE_MAX+1;
 }
 
-static inline uint8_t get_configure_number_for_device(tusb_desc_device_t* dev_desc)
-{
-  uint8_t config_num = 1;
-
-  // invoke callback to ask user which configuration to select
-  if (tuh_device_attached_cb)
-  {
-    config_num = tu_min8(1, tuh_device_attached_cb(dev_desc) );
-  }
-
-  return config_num;
-}
-
 #endif
diff --git a/src/host/usbh.h b/src/host/usbh.h
index 56a5ce72..1774666f 100644
--- a/src/host/usbh.h
+++ b/src/host/usbh.h
@@ -90,7 +90,7 @@ static inline bool tuh_device_is_configured(uint8_t dev_addr)
 //--------------------------------------------------------------------+
 // APPLICATION CALLBACK
 //--------------------------------------------------------------------+
-TU_ATTR_WEAK uint8_t tuh_device_attached_cb (tusb_desc_device_t const *p_desc_device);
+TU_ATTR_WEAK uint8_t tuh_attach_cb (tusb_desc_device_t const *desc_device);
 
 /** Callback invoked when device is mounted (configured) */
 TU_ATTR_WEAK void tuh_mount_cb (uint8_t dev_addr);
diff --git a/src/host/usbh_hcd.h b/src/host/usbh_hcd.h
index 019b9f03..435af96b 100644
--- a/src/host/usbh_hcd.h
+++ b/src/host/usbh_hcd.h
@@ -53,7 +53,6 @@ typedef struct {
   //------------- device descriptor -------------//
   uint16_t vendor_id;
   uint16_t product_id;
-  uint8_t  configure_count; // bNumConfigurations alias
 
   //------------- configuration descriptor -------------//
   uint8_t interface_count; // bNumInterfaces alias