diff --git a/subsys/bluetooth/controller/ll_sw/nordic/hal/irq_vendor_hal.h b/subsys/bluetooth/controller/ll_sw/nordic/hal/irq_vendor_hal.h
new file mode 100644
index 00000000000..de13525f2de
--- /dev/null
+++ b/subsys/bluetooth/controller/ll_sw/nordic/hal/irq_vendor_hal.h
@@ -0,0 +1,7 @@
+/*
+ * Copyright (c) 2018 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "hal/nrf5/nrf5_sw_irqs.h"
diff --git a/subsys/bluetooth/controller/ll_sw/nordic/hal/nrf5/mayfly.c b/subsys/bluetooth/controller/ll_sw/nordic/hal/nrf5/mayfly.c
index efc24781303..44f457c2bbf 100644
--- a/subsys/bluetooth/controller/ll_sw/nordic/hal/nrf5/mayfly.c
+++ b/subsys/bluetooth/controller/ll_sw/nordic/hal/nrf5/mayfly.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2018 Nordic Semiconductor ASA
+ * Copyright (c) 2016-2019 Nordic Semiconductor ASA
  * Copyright (c) 2016 Vinayak Kariappa Chettimada
  *
  * SPDX-License-Identifier: Apache-2.0
@@ -14,6 +14,7 @@
 #define LOG_MODULE_NAME bt_ctlr_nrf5_mayfly
 #include "common/log.h"
 #include "hal/debug.h"
+#include "hal/nrf5/nrf5_sw_irqs.h"
 
 #if defined(CONFIG_BT_LL_SW_LEGACY)
 #define MAYFLY_CALL_ID_WORKER MAYFLY_CALL_ID_0
@@ -34,9 +35,9 @@ void mayfly_enable_cb(u8_t caller_id, u8_t callee_id, u8_t enable)
 	LL_ASSERT(callee_id == MAYFLY_CALL_ID_JOB);
 
 	if (enable) {
-		irq_enable(SWI5_IRQn);
+		irq_enable(HAL_RADIO_SW_IRQ);
 	} else {
-		irq_disable(SWI5_IRQn);
+		irq_disable(HAL_RADIO_SW_IRQ);
 	}
 }
 
@@ -47,14 +48,14 @@ u32_t mayfly_is_enabled(u8_t caller_id, u8_t callee_id)
 	switch (callee_id) {
 #if defined(CONFIG_BT_LL_SW_SPLIT)
 	case MAYFLY_CALL_ID_LLL:
-		return irq_is_enabled(SWI4_IRQn);
+		return irq_is_enabled(HAL_RADIO_LLL_IRQ);
 #endif /* CONFIG_BT_LL_SW_SPLIT */
 
 	case MAYFLY_CALL_ID_WORKER:
 		return irq_is_enabled(RTC0_IRQn);
 
 	case MAYFLY_CALL_ID_JOB:
-		return irq_is_enabled(SWI5_IRQn);
+		return irq_is_enabled(HAL_RADIO_SW_IRQ);
 
 	default:
 		LL_ASSERT(0);
@@ -104,7 +105,7 @@ void mayfly_pend(u8_t caller_id, u8_t callee_id)
 	switch (callee_id) {
 #if defined(CONFIG_BT_LL_SW_SPLIT)
 	case MAYFLY_CALL_ID_LLL:
-		NVIC_SetPendingIRQ(SWI4_IRQn);
+		hal_nrf5_pend_lll_irq();
 		break;
 #endif /* CONFIG_BT_LL_SW_SPLIT */
 
@@ -113,7 +114,7 @@ void mayfly_pend(u8_t caller_id, u8_t callee_id)
 		break;
 
 	case MAYFLY_CALL_ID_JOB:
-		NVIC_SetPendingIRQ(SWI5_IRQn);
+		hal_nrf5_pend_job_irq();
 		break;
 
 	default:
diff --git a/subsys/bluetooth/controller/ll_sw/nordic/hal/nrf5/nrf5_sw_irqs.h b/subsys/bluetooth/controller/ll_sw/nordic/hal/nrf5/nrf5_sw_irqs.h
new file mode 100644
index 00000000000..214c6b1be6a
--- /dev/null
+++ b/subsys/bluetooth/controller/ll_sw/nordic/hal/nrf5/nrf5_sw_irqs.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2019 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#if defined(CONFIG_SOC_SERIES_NRF51X) || defined(CONFIG_SOC_COMPATIBLE_NRF52X)
+
+static inline void hal_nrf5_irq_init(void)
+{
+	/* No platform-specific initialization required. */
+}
+
+/* SW IRQs required for the nRF5 BLE Controller (Split Architecture). */
+#if defined(CONFIG_BT_LL_SW_SPLIT)
+#define HAL_RADIO_LLL_IRQ     NRF5_IRQ_SWI4_IRQn
+#define HAL_RADIO_ULL_LOW_IRQ NRF5_IRQ_SWI5_IRQn
+
+#define HAL_RADIO_SW_IRQ      HAL_RADIO_ULL_LOW_IRQ
+
+static inline void hal_nrf5_pend_lll_irq(void)
+{
+	NVIC_SetPendingIRQ(HAL_RADIO_LLL_IRQ);
+}
+
+#elif defined(CONFIG_BT_LL_SW_LEGACY)
+/* A single SW IRQ is required for the nRF Legacy BLE Controller. */
+#define HAL_RADIO_SW_IRQ NRF5_IRQ_SWI5_IRQn
+
+#else
+#error "CTRL architecture not defined"
+#endif
+
+static inline void hal_nrf5_pend_job_irq(void)
+{
+	NVIC_SetPendingIRQ(HAL_RADIO_SW_IRQ);
+}
+
+#endif /* CONFIG_SOC_SERIES_NRF51X || CONFIG_SOC_COMPATIBLE_NRF52X */
diff --git a/subsys/bluetooth/controller/ll_sw/nordic/lll/lll.c b/subsys/bluetooth/controller/ll_sw/nordic/lll/lll.c
index d06cc4e33a6..c1f4e65907c 100644
--- a/subsys/bluetooth/controller/ll_sw/nordic/lll/lll.c
+++ b/subsys/bluetooth/controller/ll_sw/nordic/lll/lll.c
@@ -11,9 +11,12 @@
 #include <drivers/clock_control.h>
 #include <drivers/clock_control/nrf_clock_control.h>
 
+#include <soc.h>
+
 #include "hal/ccm.h"
 #include "hal/radio.h"
 #include "hal/ticker.h"
+#include "hal/irq_vendor_hal.h"
 
 #include "util/mem.h"
 #include "util/memq.h"
@@ -27,7 +30,7 @@
 
 #define LOG_MODULE_NAME bt_ctlr_llsw_nordic_lll
 #include "common/log.h"
-#include <soc.h>
+
 #include "hal/debug.h"
 
 static struct {
@@ -90,7 +93,7 @@ static void rtc0_nrf5_isr(void *arg)
 	DEBUG_TICKER_ISR(0);
 }
 
-static void swi4_nrf5_isr(void *arg)
+static void lll_nrf5_isr(void *arg)
 {
 	DEBUG_RADIO_ISR(1);
 
@@ -99,7 +102,7 @@ static void swi4_nrf5_isr(void *arg)
 	DEBUG_RADIO_ISR(0);
 }
 
-static void swi5_nrf5_isr(void *arg)
+static void ull_low_nrf5_isr(void *arg)
 {
 	DEBUG_TICKER_JOB(1);
 
@@ -142,21 +145,28 @@ int lll_init(void)
 		return err;
 	}
 
+	/* Initialize SW IRQ structure */
+	hal_nrf5_irq_init();
+
 	/* Connect ISRs */
 	IRQ_DIRECT_CONNECT(NRF5_IRQ_RADIO_IRQn, CONFIG_BT_CTLR_LLL_PRIO,
 			   radio_nrf5_isr, 0);
-	IRQ_CONNECT(NRF5_IRQ_SWI4_IRQn, CONFIG_BT_CTLR_LLL_PRIO,
-		    swi4_nrf5_isr, NULL, 0);
 	IRQ_CONNECT(NRF5_IRQ_RTC0_IRQn, CONFIG_BT_CTLR_ULL_HIGH_PRIO,
 		    rtc0_nrf5_isr, NULL, 0);
-	IRQ_CONNECT(NRF5_IRQ_SWI5_IRQn, CONFIG_BT_CTLR_ULL_LOW_PRIO,
-		    swi5_nrf5_isr, NULL, 0);
+#if HAL_RADIO_LLL_IRQ != HAL_RADIO_ULL_LOW_IRQ
+	IRQ_CONNECT(HAL_RADIO_LLL_IRQ, CONFIG_BT_CTLR_LLL_PRIO,
+		    lll_nrf5_isr, NULL, 0);
+	IRQ_CONNECT(HAL_RADIO_ULL_LOW_IRQ, CONFIG_BT_CTLR_ULL_LOW_PRIO,
+		    ull_low_nrf5_isr, NULL, 0);
+#endif
 
 	/* Enable IRQs */
 	irq_enable(NRF5_IRQ_RADIO_IRQn);
-	irq_enable(NRF5_IRQ_SWI4_IRQn);
 	irq_enable(NRF5_IRQ_RTC0_IRQn);
-	irq_enable(NRF5_IRQ_SWI5_IRQn);
+#if HAL_RADIO_LLL_IRQ != HAL_RADIO_ULL_LOW_IRQ
+	irq_enable(HAL_RADIO_LLL_IRQ);
+	irq_enable(HAL_RADIO_ULL_LOW_IRQ);
+#endif
 
 	return 0;
 }