diff --git a/tests/test/host/hid/test_hidh_keyboard.c b/tests/test/host/hid/test_hidh_keyboard.c
index 3f915919a..d63a5eedb 100644
--- a/tests/test/host/hid/test_hidh_keyboard.c
+++ b/tests/test/host/hid/test_hidh_keyboard.c
@@ -61,29 +61,25 @@ tusb_keyboard_report_t sample_key[2] =
 
 uint8_t dev_addr;
 tusb_keyboard_report_t report;
-uint8_t instance_num;
-keyboard_interface_t* p_hidh_kbd_interface;
+hidh_keyboard_info_t *p_hidh_kbd;
 
 tusb_descriptor_interface_t const *p_kbd_interface_desc = &desc_configuration.keyboard_interface;
 tusb_descriptor_endpoint_t  const *p_kdb_endpoint_desc  = &desc_configuration.keyboard_endpoint;
 
 void setUp(void)
 {
-  instance_num = 0;
-  dev_addr = RANDOM(TUSB_CFG_HOST_DEVICE_MAX)+1;
-
   memclr_(&report, sizeof(tusb_keyboard_report_t));
+  dev_addr = RANDOM(TUSB_CFG_HOST_DEVICE_MAX)+1;
 
   hidh_keyboard_init();
 
-  keyboard_data[dev_addr-1].instance_count = 1;
-  p_hidh_kbd_interface = &keyboard_data[dev_addr-1].instance[instance_num];
+  p_hidh_kbd = &keyboard_data[dev_addr-1];
 
-  p_hidh_kbd_interface->report_size = sizeof(tusb_keyboard_report_t);
-  p_hidh_kbd_interface->pipe_in = (pipe_handle_t) {
-    .dev_addr = dev_addr,
+  p_hidh_kbd->report_size = sizeof(tusb_keyboard_report_t);
+  p_hidh_kbd->pipe_hdl = (pipe_handle_t) {
+    .dev_addr  = dev_addr,
     .xfer_type = TUSB_XFER_INTERRUPT,
-    .index = 1
+    .index     = 1
   };
 
 }
@@ -102,10 +98,10 @@ void TEST_ASSERT_PIPE_HANDLE(pipe_handle_t x, pipe_handle_t y)
   TEST_ASSERT_EQUAL(x.index     , y.index);
 }
 
-void test_keyboard_no_instances_invalid_para(void)
+void test_keyboard_is_supported_fail(void)
 {
   tusbh_device_get_state_IgnoreAndReturn(TUSB_DEVICE_STATE_UNPLUG);
-  TEST_ASSERT_EQUAL(0, tusbh_hid_keyboard_no_instances(dev_addr));
+  TEST_ASSERT_FALSE( tusbh_hid_keyboard_is_supported(dev_addr) );
 }
 
 void test_keyboard_init(void)
@@ -120,20 +116,20 @@ void test_keyboard_open_ok(void)
 {
   uint16_t length=0;
   pipe_handle_t pipe_hdl = {.dev_addr = dev_addr, .xfer_type = TUSB_XFER_INTERRUPT, .index = 2};
-  keyboard_interface_t* p_new_instance = &keyboard_data[dev_addr-1].instance[instance_num+1];
+  memclr_(p_hidh_kbd, sizeof(hidh_keyboard_info_t));
 
   hcd_pipe_open_ExpectAndReturn(dev_addr, p_kdb_endpoint_desc, TUSB_CLASS_HID, pipe_hdl);
 
   //------------- Code Under TEST -------------//
   TEST_ASSERT_EQUAL(TUSB_ERROR_NONE, hidh_keyboard_open_subtask(dev_addr, (uint8_t*) p_kbd_interface_desc, &length));
 
-  TEST_ASSERT_PIPE_HANDLE(pipe_hdl, p_new_instance->pipe_in);
-  TEST_ASSERT_EQUAL(8, p_new_instance->report_size);
+  TEST_ASSERT_PIPE_HANDLE(pipe_hdl, p_hidh_kbd->pipe_hdl);
+  TEST_ASSERT_EQUAL(8, p_hidh_kbd->report_size);
   TEST_ASSERT_EQUAL(sizeof(tusb_descriptor_interface_t) + sizeof(tusb_hid_descriptor_hid_t) + sizeof(tusb_descriptor_endpoint_t),
                    length);
 
   tusbh_device_get_state_IgnoreAndReturn(TUSB_DEVICE_STATE_CONFIGURED);
-  TEST_ASSERT_EQUAL(2, tusbh_hid_keyboard_no_instances(dev_addr)); // init set instance number to 1
+  TEST_ASSERT_TRUE( tusbh_hid_keyboard_is_supported(dev_addr) );
 }
 
 void test_keyboard_close(void)
@@ -150,12 +146,6 @@ void test_keyboard_get_invalid_address(void)
   TEST_ASSERT_EQUAL(TUSB_ERROR_INVALID_PARA, tusbh_hid_keyboard_get(0, 0, NULL)); // invalid address
 }
 
-void test_keyboard_get_invalid_instance(void)
-{
-  tusbh_device_get_state_IgnoreAndReturn(TUSB_DEVICE_STATE_CONFIGURED);
-  TEST_ASSERT_EQUAL(TUSB_ERROR_INVALID_PARA, tusbh_hid_keyboard_get(dev_addr, TUSB_CFG_HOST_HID_KEYBOARD_NO_INSTANCES_PER_DEVICE, &report)); // invalid instance
-}
-
 void test_keyboard_get_invalid_buffer(void)
 {
   tusbh_device_get_state_IgnoreAndReturn(TUSB_DEVICE_STATE_CONFIGURED);
@@ -171,18 +161,18 @@ void test_keyboard_get_device_not_ready(void)
 void test_keyboard_get_report_xfer_failed()
 {
   tusbh_device_get_state_IgnoreAndReturn(TUSB_DEVICE_STATE_CONFIGURED);
-  hcd_pipe_xfer_ExpectAndReturn(p_hidh_kbd_interface->pipe_in, (uint8_t*) &report, p_hidh_kbd_interface->report_size, true, TUSB_ERROR_INVALID_PARA);
+  hcd_pipe_xfer_ExpectAndReturn(p_hidh_kbd->pipe_hdl, (uint8_t*) &report, p_hidh_kbd->report_size, true, TUSB_ERROR_INVALID_PARA);
 
   //------------- Code Under TEST -------------//
-  TEST_ASSERT_EQUAL(TUSB_ERROR_INVALID_PARA, tusbh_hid_keyboard_get(dev_addr, instance_num, &report));
+  TEST_ASSERT_EQUAL(TUSB_ERROR_INVALID_PARA, tusbh_hid_keyboard_get(dev_addr, 0, &report));
 }
 
 void test_keyboard_get_ok()
 {
   tusbh_device_get_state_IgnoreAndReturn(TUSB_DEVICE_STATE_CONFIGURED);
-  hcd_pipe_xfer_ExpectAndReturn(p_hidh_kbd_interface->pipe_in, (uint8_t*) &report, p_hidh_kbd_interface->report_size, true, TUSB_ERROR_NONE);
+  hcd_pipe_xfer_ExpectAndReturn(p_hidh_kbd->pipe_hdl, (uint8_t*) &report, p_hidh_kbd->report_size, true, TUSB_ERROR_NONE);
 
   //------------- Code Under TEST -------------//
-  TEST_ASSERT_EQUAL(TUSB_ERROR_NONE, tusbh_hid_keyboard_get(dev_addr, instance_num, &report));
+  TEST_ASSERT_EQUAL(TUSB_ERROR_NONE, tusbh_hid_keyboard_get(dev_addr, 0, &report));
 }
 
diff --git a/tinyusb/class/hid_host_keyboard.c b/tinyusb/class/hid_host_keyboard.c
index 984a427d4..110f2c83a 100644
--- a/tinyusb/class/hid_host_keyboard.c
+++ b/tinyusb/class/hid_host_keyboard.c
@@ -56,10 +56,10 @@
 //--------------------------------------------------------------------+
 STATIC_ hidh_keyboard_info_t keyboard_data[TUSB_CFG_HOST_DEVICE_MAX]; // does not have addr0, index = dev_address-1
 
-static inline keyboard_interface_t* get_kbd_instance(uint8_t dev_addr, uint8_t instance_num) ATTR_PURE ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT;
-static inline keyboard_interface_t* get_kbd_instance(uint8_t dev_addr, uint8_t instance_num)
+static inline hidh_keyboard_info_t* get_kbd_data(uint8_t dev_addr) ATTR_PURE ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT;
+static inline hidh_keyboard_info_t* get_kbd_data(uint8_t dev_addr)
 {
-  return &keyboard_data[dev_addr-1].instance[instance_num];
+  return &keyboard_data[dev_addr-1];
 }
 
 //--------------------------------------------------------------------+
@@ -69,28 +69,27 @@ static inline keyboard_interface_t* get_kbd_instance(uint8_t dev_addr, uint8_t i
 //--------------------------------------------------------------------+
 // PUBLIC API (parameter validation required)
 //--------------------------------------------------------------------+
-tusb_error_t tusbh_hid_keyboard_get(uint8_t const dev_addr, uint8_t instance_num, tusb_keyboard_report_t * const report)
+bool  tusbh_hid_keyboard_is_supported(uint8_t dev_addr)
+{
+  return tusbh_device_is_configured(dev_addr) && pipehandle_is_valid(keyboard_data[dev_addr-1].pipe_hdl);
+}
+
+tusb_error_t tusbh_hid_keyboard_get(uint8_t dev_addr, uint8_t instance_num, tusb_keyboard_report_t * const report)
 {
   //------------- parameters validation -------------//
   ASSERT_INT(TUSB_DEVICE_STATE_CONFIGURED, tusbh_device_get_state(dev_addr), TUSB_ERROR_DEVICE_NOT_READY);
   ASSERT_PTR(report, TUSB_ERROR_INVALID_PARA);
-  ASSERT(instance_num < keyboard_data[dev_addr-1].instance_count, TUSB_ERROR_INVALID_PARA);
 
-  keyboard_interface_t *p_kbd = get_kbd_instance(dev_addr, instance_num);
+  (void) instance_num;
 
-  // TODO abtract to use hidh service
-  ASSERT_STATUS( hcd_pipe_xfer(p_kbd->pipe_in, (uint8_t*) report, p_kbd->report_size, true) ) ;
+  hidh_keyboard_info_t *p_keyboard = get_kbd_data(dev_addr);
+
+  // TODO abstract to use hidh service
+  ASSERT_STATUS( hcd_pipe_xfer(p_keyboard->pipe_hdl, (uint8_t*) report, p_keyboard->report_size, true) ) ;
 
   return TUSB_ERROR_NONE;
 }
 
-uint8_t tusbh_hid_keyboard_no_instances(uint8_t const dev_addr)
-{
-  ASSERT(tusbh_device_is_configured(dev_addr), 0);
-
-  return keyboard_data[dev_addr-1].instance_count;
-}
-
 //--------------------------------------------------------------------+
 // INTERNAL API (no need for parameter validation)
 //--------------------------------------------------------------------+
@@ -101,7 +100,7 @@ void hidh_keyboard_init(void)
 
 tusb_error_t hidh_keyboard_open_subtask(uint8_t dev_addr, uint8_t const *descriptor, uint16_t *p_length)
 {
-  keyboard_interface_t *p_keyboard = get_kbd_instance(dev_addr, keyboard_data[dev_addr-1].instance_count);
+  hidh_keyboard_info_t *p_keyboard = get_kbd_data(dev_addr);
   uint8_t const *p_desc = descriptor;
 
   p_desc += p_desc[DESCRIPTOR_OFFSET_LENGTH]; // skip interface
@@ -117,16 +116,13 @@ tusb_error_t hidh_keyboard_open_subtask(uint8_t dev_addr, uint8_t const *descrip
   //------------- Endpoint Descriptor -------------//
   ASSERT_INT(TUSB_DESC_ENDPOINT, p_desc[DESCRIPTOR_OFFSET_TYPE], TUSB_ERROR_INVALID_PARA);
 
-  p_keyboard->pipe_in = hcd_pipe_open(dev_addr, (tusb_descriptor_endpoint_t*) p_desc, TUSB_CLASS_HID);
-
-  p_keyboard->report_size =  ( ((tusb_descriptor_endpoint_t*) p_desc)->wMaxPacketSize & (BIT_(12)-1) );
+  p_keyboard->pipe_hdl    = hcd_pipe_open(dev_addr, (tusb_descriptor_endpoint_t*) p_desc, TUSB_CLASS_HID);
+  p_keyboard->report_size = ( ((tusb_descriptor_endpoint_t*) p_desc)->wMaxPacketSize & (BIT_(12)-1) );
 
   p_desc += p_desc[DESCRIPTOR_OFFSET_LENGTH]; // advance endpoint descriptor
   (*p_length) = p_desc - descriptor;
 
-  ASSERT (pipehandle_is_valid(p_keyboard->pipe_in), TUSB_ERROR_HCD_FAILED);
-
-  keyboard_data[dev_addr-1].instance_count++;
+  ASSERT (pipehandle_is_valid(p_keyboard->pipe_hdl), TUSB_ERROR_HCD_FAILED);
 
   return TUSB_ERROR_NONE;
 }
diff --git a/tinyusb/class/hid_host_keyboard.h b/tinyusb/class/hid_host_keyboard.h
index 4c5b19ac9..0d4d17a52 100644
--- a/tinyusb/class/hid_host_keyboard.h
+++ b/tinyusb/class/hid_host_keyboard.h
@@ -62,15 +62,9 @@
 //--------------------------------------------------------------------+
 // PUBLIC API (parameter validation required)
 //--------------------------------------------------------------------+
-uint8_t       tusbh_hid_keyboard_no_instances(uint8_t const dev_addr) ATTR_PURE ATTR_WARN_UNUSED_RESULT;
-static inline bool  tusbh_hid_keyboard_is_supported(uint8_t const dev_addr) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT ATTR_PURE;
-static inline bool  tusbh_hid_keyboard_is_supported(uint8_t const dev_addr)
-{
-  return tusbh_hid_keyboard_no_instances(dev_addr) > 0;
-}
-
-tusb_error_t  tusbh_hid_keyboard_get(uint8_t const dev_addr, uint8_t const instance_num, tusb_keyboard_report_t * const report) ATTR_WARN_UNUSED_RESULT;
-pipe_status_t tusbh_hid_keyboard_pipe_status(uint8_t const dev_addr, uint8_t const instance_num) ATTR_WARN_UNUSED_RESULT;
+bool  tusbh_hid_keyboard_is_supported(uint8_t dev_addr) ATTR_PURE ATTR_WARN_UNUSED_RESULT;
+tusb_error_t  tusbh_hid_keyboard_get(uint8_t dev_addr, uint8_t instance_num, tusb_keyboard_report_t * const report) ATTR_WARN_UNUSED_RESULT;
+pipe_status_t tusbh_hid_keyboard_pipe_status(uint8_t dev_addr, uint8_t instance_num) ATTR_WARN_UNUSED_RESULT;
 
 //--------------------------------------------------------------------+
 // INTERNAL API (no need for parameter validation)
@@ -78,14 +72,9 @@ pipe_status_t tusbh_hid_keyboard_pipe_status(uint8_t const dev_addr, uint8_t con
 #ifdef _TINY_USB_SOURCE_FILE_
 
 typedef struct {
-  pipe_handle_t pipe_in;
+  pipe_handle_t pipe_hdl;
   uint16_t report_size;
-}keyboard_interface_t;
-
-typedef struct {
-  uint8_t instance_count;
-  keyboard_interface_t instance[TUSB_CFG_HOST_HID_KEYBOARD_NO_INSTANCES_PER_DEVICE];
-} hidh_keyboard_info_t;
+}hidh_keyboard_info_t;
 
 void         hidh_keyboard_init(void);
 tusb_error_t hidh_keyboard_open_subtask(uint8_t dev_addr, uint8_t const *descriptor, uint16_t *p_length) ATTR_WARN_UNUSED_RESULT;
diff --git a/tinyusb/tusb_option.h b/tinyusb/tusb_option.h
index 55a2381a9..789e88028 100644
--- a/tinyusb/tusb_option.h
+++ b/tinyusb/tusb_option.h
@@ -125,13 +125,9 @@
 
   //------------- HID CLASS -------------//
   #define HOST_CLASS_HID   ( TUSB_CFG_HOST_HID_KEYBOARD )
-  #if TUSB_CFG_HOST_HID_KEYBOARD
-    #if !defined(TUSB_CFG_HOST_HID_KEYBOARD_NO_INSTANCES_PER_DEVICE)
-      #define TUSB_CFG_HOST_HID_KEYBOARD_NO_INSTANCES_PER_DEVICE 1
-    #endif
-
+  #if HOST_CLASS_HID
     #define HOST_HCD_XFER_INTERRUPT
-  #endif // end TUSB_CFG_HOST_HID_KEYBOARD
+  #endif
 
   #ifndef TUSB_CFG_HOST_ENUM_BUFFER_SIZE
     #define TUSB_CFG_HOST_ENUM_BUFFER_SIZE 256