diff --git a/examples/device/nrf52840/segger/nrf52840.emProject b/examples/device/nrf52840/segger/nrf52840.emProject
index e9fb8d5f5..8775d1bca 100644
--- a/examples/device/nrf52840/segger/nrf52840.emProject
+++ b/examples/device/nrf52840/segger/nrf52840.emProject
@@ -82,7 +82,6 @@
               </folder>
               <folder Name="src">
                 <file file_name="../../../../hw/mcu/nordic/nrfx/drivers/src/nrfx_power.c" />
-                <file file_name="../../../../hw/mcu/nordic/nrfx/drivers/src/nrfx_power_clock.c" />
                 <file file_name="../../../../hw/mcu/nordic/nrfx/drivers/src/nrfx_qspi.c" />
               </folder>
             </folder>
diff --git a/examples/device/nrf52840_freertos/segger/nrf5x_freertos.emProject b/examples/device/nrf52840_freertos/segger/nrf5x_freertos.emProject
index dd9edb8dd..ccc1960e4 100644
--- a/examples/device/nrf52840_freertos/segger/nrf5x_freertos.emProject
+++ b/examples/device/nrf52840_freertos/segger/nrf5x_freertos.emProject
@@ -77,7 +77,7 @@
               <folder Name="include" />
               <folder Name="src">
                 <file file_name="../../../../hw/mcu/nordic/nrfx/drivers/src/nrfx_power.c" />
-                <file file_name="../../../../hw/mcu/nordic/nrfx/drivers/src/nrfx_power_clock.c" />
+                <file file_name="../../../../hw/mcu/nordic/nrfx/drivers/src/nrfx_qspi.c" />
               </folder>
             </folder>
             <folder Name="hal" />
diff --git a/hw/bsp/pca10056/board_pca10056.c b/hw/bsp/pca10056/board_pca10056.c
index 74ae961a4..6e80a8eb0 100644
--- a/hw/bsp/pca10056/board_pca10056.c
+++ b/hw/bsp/pca10056/board_pca10056.c
@@ -38,9 +38,9 @@
 
 #include "bsp/board.h"
 #include "nrf_gpio.h"
-
 #include "nrfx_power.h"
 #include "nrfx_qspi.h"
+#include "tusb.h"
 
 /*------------------------------------------------------------------*/
 /* MACRO TYPEDEF CONSTANT ENUM
@@ -76,9 +76,12 @@ uint32_t tusb_hal_millis(void)
 /*------------------------------------------------------------------*/
 /* BOARD API
  *------------------------------------------------------------------*/
-#define QSPI_STD_CMD_RSTEN  0x66
-#define QSPI_STD_CMD_RST    0x99
-#define QSPI_STD_CMD_WRSR   0x01
+enum {
+    QSPI_CMD_RSTEN = 0x66,
+    QSPI_CMD_RST = 0x99,
+    QSPI_CMD_WRSR = 0x01,
+    QSPI_CMD_READID = 0x90
+};
 
 extern void qspi_flash_complete (void);
 
@@ -147,24 +150,41 @@ void board_init(void)
     .length    = 0,
     .io2_level = true,
     .io3_level = true,
-    .wipwait   = true,
-    .wren      = true
+    .wipwait   = false,
+    .wren      = false
   };
 
   // Send reset enable
-  cinstr_cfg.opcode = QSPI_STD_CMD_RSTEN;
+  cinstr_cfg.opcode = QSPI_CMD_RSTEN;
   cinstr_cfg.length = NRF_QSPI_CINSTR_LEN_1B;
   nrfx_qspi_cinstr_xfer(&cinstr_cfg, NULL, NULL);
 
   // Send reset command
-  cinstr_cfg.opcode = QSPI_STD_CMD_RST;
+  cinstr_cfg.opcode = QSPI_CMD_RST;
   cinstr_cfg.length = NRF_QSPI_CINSTR_LEN_1B;
   nrfx_qspi_cinstr_xfer(&cinstr_cfg, NULL, NULL);
 
+  NRFX_DELAY_US(100); // wait for flash reset
+
+  // Send (Read ID + 3 dummy bytes) + Receive 2 bytes of Manufacture + Device ID
+  uint8_t dummy[6] = { 0 };
+  uint8_t id_resp[6] = { 0 };
+  cinstr_cfg.opcode = QSPI_CMD_READID;
+  cinstr_cfg.length = 6;
+
+  // Bug with -nrf_qspi_cinstrdata_get() didn't combine data.
+  // https://devzone.nordicsemi.com/f/nordic-q-a/38540/bug-nrf_qspi_cinstrdata_get-didn-t-collect-data-from-both-cinstrdat1-and-cinstrdat0
+  nrfx_qspi_cinstr_xfer(&cinstr_cfg, dummy, id_resp);
+
+  // Due to the bug, we collect data manually
+  uint8_t dev_id = (uint8_t) NRF_QSPI->CINSTRDAT1;
+  uint8_t mfgr_id = (uint8_t) ( NRF_QSPI->CINSTRDAT0 >> 24 );
+
   // Switch to qspi mode
   uint8_t sr_quad_en = 0x40;
-  cinstr_cfg.opcode = QSPI_STD_CMD_WRSR;
+  cinstr_cfg.opcode = QSPI_CMD_WRSR;
   cinstr_cfg.length = NRF_QSPI_CINSTR_LEN_2B;
+  cinstr_cfg.wipwait = cinstr_cfg.wren = true;
   nrfx_qspi_cinstr_xfer(&cinstr_cfg, &sr_quad_en, NULL);
 #endif
 
diff --git a/hw/bsp/pca10056/board_pca10056.h b/hw/bsp/pca10056/board_pca10056.h
index bb9949f61..d51fae22b 100644
--- a/hw/bsp/pca10056/board_pca10056.h
+++ b/hw/bsp/pca10056/board_pca10056.h
@@ -49,7 +49,7 @@
 
 // Flash type used for MSC example
 #define BOARD_MSC_FLASH_QSPI
-#define BOARD_MSC_FLASH_SIZE    (16*1024*1024)
+#define BOARD_MSC_FLASH_SIZE    (8*1024*1024)
 
 //#define BOARD_MSC_FLASH_RAM
 // #define BOARD_MSC_FLASH_SIZE    (8*1024) // 8KB is the smallest size that windows allow to mount
diff --git a/hw/mcu/nordic/nrfx b/hw/mcu/nordic/nrfx
index 096e770ee..67710e47c 160000
--- a/hw/mcu/nordic/nrfx
+++ b/hw/mcu/nordic/nrfx
@@ -1 +1 @@
-Subproject commit 096e770ee41e5ad92a2137aa6502cb04d5745e5c
+Subproject commit 67710e47c7313cc56a15748e485079831ee6a3af
diff --git a/hw/mcu/nordic/nrfx_glue.h b/hw/mcu/nordic/nrfx_glue.h
index 301937366..cdf49b4ab 100644
--- a/hw/mcu/nordic/nrfx_glue.h
+++ b/hw/mcu/nordic/nrfx_glue.h
@@ -183,7 +183,8 @@ static inline bool _NRFX_IRQ_IS_PENDING(IRQn_Type irq_number)
  *
  * @param us_time Number of microseconds to wait.
  */
-#define NRFX_DELAY_US(us_time)
+#include <soc/nrfx_coredep.h>
+#define NRFX_DELAY_US(us_time) nrfx_coredep_delay_us(us_time)
 
 //------------------------------------------------------------------------------
 
diff --git a/src/portable/nordic/nrf5x/hal_nrf5x.c b/src/portable/nordic/nrf5x/hal_nrf5x.c
index fe33825e9..4ce512746 100644
--- a/src/portable/nordic/nrf5x/hal_nrf5x.c
+++ b/src/portable/nordic/nrf5x/hal_nrf5x.c
@@ -255,7 +255,7 @@ void tusb_hal_nrf_power_event (uint32_t event)
         __DSB();
       }
 
-      nrf_usbd_isosplit_set(NRF_USBD_ISOSPLIT_Half);
+      nrf_usbd_isosplit_set(USBD_ISOSPLIT_SPLIT_HalfIN);
 
       // Enable interrupt. SOF is used as CDC auto flush
       NRF_USBD->INTENSET = USBD_INTEN_USBRESET_Msk | USBD_INTEN_USBEVENT_Msk | USBD_INTEN_EPDATA_Msk |