diff --git a/.idea/cmake.xml b/.idea/cmake.xml
index 822a70236..6f87e2a29 100644
--- a/.idea/cmake.xml
+++ b/.idea/cmake.xml
@@ -96,6 +96,7 @@
       <configuration PROFILE_NAME="itsybitsy_m4" ENABLED="false" CONFIG_NAME="Debug" GENERATION_OPTIONS="-DBOARD=itsybitsy_m4" />
       <configuration PROFILE_NAME="same54_xplained" ENABLED="false" GENERATION_OPTIONS="-DBOARD=same54_xplained -DLOG=1 -DLOGGER=RTT" />
       <configuration PROFILE_NAME="samg55_xplained" ENABLED="false" GENERATION_OPTIONS="-DBOARD=samg55_xplained" />
+      <configuration PROFILE_NAME="same70_xplained" ENABLED="false" GENERATION_OPTIONS="-DBOARD=same70_xplained -DLOG=1" />
       <configuration PROFILE_NAME="feather_nrf52840_express" ENABLED="false" CONFIG_NAME="Debug" GENERATION_OPTIONS="-DBOARD=feather_nrf52840_express -DLOG=1 -DLOGGER=RTT -DMAX3421_HOST=1" />
       <configuration PROFILE_NAME="nrf52840dk" ENABLED="false" CONFIG_NAME="Debug" GENERATION_OPTIONS="-DBOARD=nrf52840dk -DLOG=1 -DLOGGER=RTT -DTRACE_ETM=1" />
       <configuration PROFILE_NAME="nrf52840dk-zephyr" ENABLED="false" CONFIG_NAME="Debug" GENERATION_OPTIONS="-DBOARD=nrf52840dk -DLOG=1 -DTRACE_ETM=1 -DRTOS=zephyr" BUILD_OPTIONS="-v" />
diff --git a/src/host/hub.c b/src/host/hub.c
index ded851a09..7c6735ed4 100644
--- a/src/host/hub.c
+++ b/src/host/hub.c
@@ -218,31 +218,37 @@ bool hub_deinit(void) {
   return true;
 }
 
-uint16_t hub_open(uint8_t rhport, uint8_t dev_addr, tusb_desc_interface_t const *itf_desc, uint16_t max_len) {
-  (void) rhport;
+uint16_t hub_open(uint8_t rhport, uint8_t dev_addr, const tusb_desc_interface_t *itf_desc, uint16_t max_len) {
+  (void)rhport;
+  TU_VERIFY(TUSB_CLASS_HUB == itf_desc->bInterfaceClass && 0 == itf_desc->bInterfaceSubClass, 0);
 
-  TU_VERIFY(TUSB_CLASS_HUB == itf_desc->bInterfaceClass &&
-            0              == itf_desc->bInterfaceSubClass, 0);
-
-  uint16_t const drv_len = sizeof(tusb_desc_interface_t) + sizeof(tusb_desc_endpoint_t);
+  const uint16_t itf_ep_len = sizeof(tusb_desc_interface_t) + sizeof(tusb_desc_endpoint_t);
+  uint16_t       drv_len    = itf_ep_len;
   TU_ASSERT(drv_len <= max_len, 0);
 
+  hub_interface_t             *p_hub        = get_hub_itf(dev_addr);
+  const tusb_desc_interface_t *desc_itf_use = itf_desc; // interface to use for endpoint open
+
+  // Check device descriptor for MTT hub (bDeviceProtocol == 2)
+  // MTT hub has 2 alt settings: alt 0 is STT (protocol 1), alt 1 is MTT (protocol 2)
+  // Consume both alt settings and use alt setting 1 for endpoint
   tusb_desc_device_t desc_dev;
-  TU_ASSERT(tuh_descriptor_get_device_local(dev_addr, &desc_dev));
-  // Skip STT interface of MTT hub
-  if (desc_dev.bDeviceProtocol == 2 && itf_desc->bInterfaceProtocol == 1) {
-    hub_interface_t* p_hub = get_hub_itf(dev_addr);
-    p_hub->mtt = true;
-    return drv_len;
+  if (tuh_descriptor_get_device_local(dev_addr, &desc_dev) && desc_dev.bDeviceProtocol == HUB_PROTOCOL_HIGH_SPEED_MTT) {
+    drv_len += itf_ep_len;
+    TU_ASSERT(drv_len <= max_len, 0);
+    const tusb_desc_interface_t *desc_alt1 = (const tusb_desc_interface_t *)((const uint8_t *)itf_desc + itf_ep_len);
+    TU_ASSERT(desc_alt1->bDescriptorType == TUSB_DESC_INTERFACE && desc_alt1->bInterfaceClass == TUSB_CLASS_HUB &&
+                desc_alt1->bInterfaceProtocol == HUB_PROTOCOL_HIGH_SPEED_MTT,
+              0);
+    p_hub->mtt   = true;
+    desc_itf_use = desc_alt1;
   }
 
   // Interrupt Status endpoint
-  tusb_desc_endpoint_t const *desc_ep = (tusb_desc_endpoint_t const *) tu_desc_next(itf_desc);
-  TU_ASSERT(TUSB_DESC_ENDPOINT  == desc_ep->bDescriptorType &&
-            TUSB_XFER_INTERRUPT == desc_ep->bmAttributes.xfer, 0);
+  const tusb_desc_endpoint_t *desc_ep = (const tusb_desc_endpoint_t *)tu_desc_next(desc_itf_use);
+  TU_ASSERT(TUSB_DESC_ENDPOINT == desc_ep->bDescriptorType && TUSB_XFER_INTERRUPT == desc_ep->bmAttributes.xfer, 0);
   TU_ASSERT(tuh_edpt_open(dev_addr, desc_ep), 0);
 
-  hub_interface_t* p_hub = get_hub_itf(dev_addr);
   p_hub->itf_num = itf_desc->bInterfaceNumber;
   p_hub->ep_in   = desc_ep->bEndpointAddress;
 
@@ -288,8 +294,9 @@ bool hub_set_config(uint8_t daddr, uint8_t itf_num) {
     TU_ASSERT(tuh_interface_set(daddr, itf_num, 1, config_get_hub_descriptor, 0));
   } else {
     tuh_xfer_t xfer;
-    xfer.daddr   = daddr;
-    xfer.ep_addr = 0;
+    xfer.daddr     = daddr;
+    xfer.ep_addr   = 0;
+    xfer.user_data = 0;
     config_get_hub_descriptor(&xfer);
   }
 
@@ -324,7 +331,7 @@ static void config_set_port_power (tuh_xfer_t* xfer) {
   hub_interface_t* p_hub = get_hub_itf(daddr);
   hub_epbuf_t* p_epbuf = get_hub_epbuf(daddr);
 
-  // only use number of ports in hub descriptor
+  // only use the number of ports in the hub descriptor
   hub_desc_cs_t const* desc_hub = (hub_desc_cs_t const*) p_epbuf->ctrl_buf;
   p_hub->bNbrPorts = desc_hub->bNbrPorts;
   p_hub->bPwrOn2PwrGood_2ms = desc_hub->bPwrOn2PwrGood;
diff --git a/src/host/hub.h b/src/host/hub.h
index d9750f8a5..8a7feda70 100644
--- a/src/host/hub.h
+++ b/src/host/hub.h
@@ -92,6 +92,13 @@ enum {
   HUB_CHARS_OVER_CURRENT_INDIVIDUAL = 1,
 };
 
+// Hub Interface Protocol (USB 2.0 spec Table 11-16)
+typedef enum {
+  HUB_PROTOCOL_FULL_SPEED     = 0, // Full speed hub
+  HUB_PROTOCOL_HIGH_SPEED_STT = 1, // Hi-speed hub with single TT
+  HUB_PROTOCOL_HIGH_SPEED_MTT = 2, // Hi-speed hub with multiple TTs
+} hub_protocol_t;
+
 typedef struct TU_ATTR_PACKED{
   uint8_t  bLength           ; ///< Size of descriptor
   uint8_t  bDescriptorType   ; ///< Other_speed_Configuration Type