diff --git a/docs/boards.md b/docs/boards.md
index 99c90c5a5..cf5defb51 100644
--- a/docs/boards.md
+++ b/docs/boards.md
@@ -25,6 +25,7 @@ This code base already had supported for a handful of following boards (sorted a
- [Nordic nRF52840 Development Kit (aka pca10056)](https://www.nordicsemi.com/Software-and-Tools/Development-Kits/nRF52840-DK)
- [Nordic nRF52840 Dongle (aka pca10059)](https://www.nordicsemi.com/Software-and-Tools/Development-Kits/nRF52840-Dongle)
- [Nordic nRF52833 Development Kit (aka pca10100)](https://www.nordicsemi.com/Software-and-Tools/Development-Kits/nRF52833-DK)
+- [Raytac MDBT50Q-RX Dongle](https://www.raytac.com/product/ins.php?index_id=89)
### Nuvoton
diff --git a/hw/bsp/raytac_mdbt50q_rx/board.mk b/hw/bsp/raytac_mdbt50q_rx/board.mk
new file mode 100644
index 000000000..d446d3de7
--- /dev/null
+++ b/hw/bsp/raytac_mdbt50q_rx/board.mk
@@ -0,0 +1,54 @@
+CFLAGS += \
+ -flto \
+ -mthumb \
+ -mabi=aapcs \
+ -mcpu=cortex-m4 \
+ -mfloat-abi=hard \
+ -mfpu=fpv4-sp-d16 \
+ -DNRF52840_XXAA \
+ -DCFG_TUSB_MCU=OPT_MCU_NRF5X
+
+# nrfx issue undef _ARMCC_VERSION usage https://github.com/NordicSemiconductor/nrfx/issues/49
+CFLAGS += -Wno-error=undef -Wno-error=unused-parameter
+
+# due to tusb_hal_nrf_power_event
+GCCVERSION = $(firstword $(subst ., ,$(shell arm-none-eabi-gcc -dumpversion)))
+ifeq ($(shell expr $(GCCVERSION) \>= 8), 1)
+CFLAGS += -Wno-error=cast-function-type
+endif
+
+# All source paths should be relative to the top level.
+LD_FILE = hw/mcu/nordic/nrfx/mdk/nrf52840_xxaa.ld
+
+LDFLAGS += -L$(TOP)/hw/mcu/nordic/nrfx/mdk
+
+SRC_C += \
+ hw/mcu/nordic/nrfx/drivers/src/nrfx_power.c \
+ hw/mcu/nordic/nrfx/mdk/system_nrf52840.c \
+
+INC += \
+ $(TOP)/hw/mcu/nordic/cmsis/Include \
+ $(TOP)/hw/mcu/nordic \
+ $(TOP)/hw/mcu/nordic/nrfx \
+ $(TOP)/hw/mcu/nordic/nrfx/mdk \
+ $(TOP)/hw/mcu/nordic/nrfx/hal \
+ $(TOP)/hw/mcu/nordic/nrfx/drivers/include \
+ $(TOP)/hw/mcu/nordic/nrfx/drivers/src \
+
+SRC_S += hw/mcu/nordic/nrfx/mdk/gcc_startup_nrf52840.S
+
+ASFLAGS += -D__HEAP_SIZE=0
+
+# For TinyUSB port source
+VENDOR = nordic
+CHIP_FAMILY = nrf5x
+
+# For freeRTOS port source
+FREERTOS_PORT = ARM_CM4F
+
+# For flash-jlink target
+JLINK_DEVICE = nRF52840_xxAA
+JLINK_IF = swd
+
+# flash using jlink
+flash: flash-jlink
diff --git a/hw/bsp/raytac_mdbt50q_rx/raytac_mdbt50q_rx.c b/hw/bsp/raytac_mdbt50q_rx/raytac_mdbt50q_rx.c
new file mode 100644
index 000000000..8bb5a1739
--- /dev/null
+++ b/hw/bsp/raytac_mdbt50q_rx/raytac_mdbt50q_rx.c
@@ -0,0 +1,190 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 Ha Thach (tinyusb.org)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * This file is part of the TinyUSB stack.
+ */
+
+#include "bsp/board.h"
+
+#include "nrfx.h"
+#include "nrfx/hal/nrf_gpio.h"
+#include "nrfx/drivers/include/nrfx_power.h"
+
+#ifdef SOFTDEVICE_PRESENT
+#include "nrf_sdm.h"
+#include "nrf_soc.h"
+#endif
+
+/*------------------------------------------------------------------*/
+/* MACRO TYPEDEF CONSTANT ENUM
+ *------------------------------------------------------------------*/
+#define LED_PIN (32+13) // P1.13
+#define LED_STATE_ON 0
+
+// Button 1
+#define BUTTON_PIN 15 // P0.15
+#define BUTTON_STATE_ACTIVE 0
+
+// tinyusb function that handles power event (detected, ready, removed)
+// We must call it within SD's SOC event handler, or set it as power event handler if SD is not enabled.
+extern void tusb_hal_nrf_power_event(uint32_t event);
+
+void board_init(void)
+{
+ // Config clock source: XTAL or RC in sdk_config.h
+ NRF_CLOCK->LFCLKSRC = (uint32_t)((CLOCK_LFCLKSRC_SRC_Xtal << CLOCK_LFCLKSRC_SRC_Pos) & CLOCK_LFCLKSRC_SRC_Msk);
+ NRF_CLOCK->TASKS_LFCLKSTART = 1UL;
+
+ // LED
+ nrf_gpio_cfg_output(LED_PIN);
+ board_led_write(false);
+
+ // Button
+ nrf_gpio_cfg_input(BUTTON_PIN, NRF_GPIO_PIN_PULLUP);
+
+#if CFG_TUSB_OS == OPT_OS_NONE
+ // 1ms tick timer
+ SysTick_Config(SystemCoreClock/1000);
+#endif
+
+#if TUSB_OPT_DEVICE_ENABLED
+ // Priorities 0, 1, 4 (nRF52) are reserved for SoftDevice
+ // 2 is highest for application
+ NVIC_SetPriority(USBD_IRQn, 2);
+
+ // USB power may already be ready at this time -> no event generated
+ // We need to invoke the handler based on the status initially
+ uint32_t usb_reg;
+
+#ifdef SOFTDEVICE_PRESENT
+ uint8_t sd_en = false;
+ sd_softdevice_is_enabled(&sd_en);
+
+ if ( sd_en ) {
+ sd_power_usbdetected_enable(true);
+ sd_power_usbpwrrdy_enable(true);
+ sd_power_usbremoved_enable(true);
+
+ sd_power_usbregstatus_get(&usb_reg);
+ }else
+#endif
+ {
+ // Power module init
+ const nrfx_power_config_t pwr_cfg = { 0 };
+ nrfx_power_init(&pwr_cfg);
+
+ // Register tusb function as USB power handler
+ const nrfx_power_usbevt_config_t config = { .handler = (nrfx_power_usb_event_handler_t) tusb_hal_nrf_power_event };
+ nrfx_power_usbevt_init(&config);
+
+ nrfx_power_usbevt_enable();
+
+ usb_reg = NRF_POWER->USBREGSTATUS;
+ }
+
+ if ( usb_reg & POWER_USBREGSTATUS_VBUSDETECT_Msk ) tusb_hal_nrf_power_event(NRFX_POWER_USB_EVT_DETECTED);
+ if ( usb_reg & POWER_USBREGSTATUS_OUTPUTRDY_Msk ) tusb_hal_nrf_power_event(NRFX_POWER_USB_EVT_READY);
+#endif
+}
+
+//--------------------------------------------------------------------+
+// Board porting API
+//--------------------------------------------------------------------+
+
+void board_led_write(bool state)
+{
+ nrf_gpio_pin_write(LED_PIN, state ? LED_STATE_ON : (1-LED_STATE_ON));
+}
+
+uint32_t board_button_read(void)
+{
+ return BUTTON_STATE_ACTIVE == nrf_gpio_pin_read(BUTTON_PIN);
+}
+
+int board_uart_read(uint8_t* buf, int len)
+{
+ (void) buf; (void) len;
+ return 0;
+}
+
+int board_uart_write(void const * buf, int len)
+{
+ (void) buf; (void) len;
+ return 0;
+}
+
+#if CFG_TUSB_OS == OPT_OS_NONE
+volatile uint32_t system_ticks = 0;
+void SysTick_Handler (void)
+{
+ system_ticks++;
+}
+
+uint32_t board_millis(void)
+{
+ return system_ticks;
+}
+#endif
+
+#ifdef SOFTDEVICE_PRESENT
+// process SOC event from SD
+uint32_t proc_soc(void)
+{
+ uint32_t soc_evt;
+ uint32_t err = sd_evt_get(&soc_evt);
+
+ if (NRF_SUCCESS == err)
+ {
+ /*------------- usb power event handler -------------*/
+ int32_t usbevt = (soc_evt == NRF_EVT_POWER_USB_DETECTED ) ? NRFX_POWER_USB_EVT_DETECTED:
+ (soc_evt == NRF_EVT_POWER_USB_POWER_READY) ? NRFX_POWER_USB_EVT_READY :
+ (soc_evt == NRF_EVT_POWER_USB_REMOVED ) ? NRFX_POWER_USB_EVT_REMOVED : -1;
+
+ if ( usbevt >= 0) tusb_hal_nrf_power_event(usbevt);
+ }
+
+ return err;
+}
+
+uint32_t proc_ble(void)
+{
+ // do nothing with ble
+ return NRF_ERROR_NOT_FOUND;
+}
+
+void SD_EVT_IRQHandler(void)
+{
+ // process BLE and SOC until there is no more events
+ while( (NRF_ERROR_NOT_FOUND != proc_ble()) || (NRF_ERROR_NOT_FOUND != proc_soc()) )
+ {
+
+ }
+}
+
+void nrf_error_cb(uint32_t id, uint32_t pc, uint32_t info)
+{
+ (void) id;
+ (void) pc;
+ (void) info;
+}
+#endif