diff --git a/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC/objects.h b/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC/objects.h
index 2eb11fa8e2..f71ba17944 100644
--- a/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC/objects.h
+++ b/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC/objects.h
@@ -58,6 +58,7 @@ struct i2c_s {
 struct spi_s {
     uint32_t instance;
     uint8_t bits;
+    uint8_t ssel_num;
 };
 
 #if DEVICE_FLASH && !defined(TARGET_FLASH_CMSIS_ALGO)
diff --git a/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC/pinmap.c b/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC/pinmap.c
index a822d0ac20..a0100daf69 100644
--- a/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC/pinmap.c
+++ b/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC/pinmap.c
@@ -33,7 +33,7 @@ void pin_function(PinName pin, int function)
     IOCON->PIO[port_number][pin_number] |= IOCON_PIO_DIGIMODE_MASK;
 
     reg = IOCON->PIO[port_number][pin_number];
-    reg = (reg & ~0x7) | (function & IOCON_PIO_FUNC_MASK);
+    reg = (reg & ~IOCON_PIO_FUNC_MASK) | (function & IOCON_PIO_FUNC_MASK);
     IOCON->PIO[port_number][pin_number] = reg;
 }
 
diff --git a/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC/spi_api.c b/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC/spi_api.c
index 80984b5eae..e2054f6fec 100644
--- a/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC/spi_api.c
+++ b/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC/spi_api.c
@@ -42,6 +42,7 @@ void spi_init(spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel
 
     obj->instance = pinmap_merge(spi_data, spi_cntl);
     MBED_ASSERT((int)obj->instance != NC);
+    obj->ssel_num = 0;
 
     switch (obj->instance) {
         case 0:
@@ -96,6 +97,7 @@ void spi_init(spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel
     pinmap_pinout(sclk, PinMap_SPI_SCLK);
     if (ssel != NC) {
         pinmap_pinout(ssel, PinMap_SPI_SSEL);
+        obj->ssel_num = pinmap_function(ssel, PinMap_SPI_SSEL) >> SSELNUM_SHIFT;
     }
 }
 
@@ -128,6 +130,7 @@ void spi_format(spi_t *obj, int bits, int mode, int slave)
         master_config.polarity = (mode & 0x2) ? kSPI_ClockPolarityActiveLow : kSPI_ClockPolarityActiveHigh;
         master_config.phase = (mode & 0x1) ? kSPI_ClockPhaseSecondEdge : kSPI_ClockPhaseFirstEdge;
         master_config.direction = kSPI_MsbFirst;
+        master_config.sselNum = obj->ssel_num;
         if (baud_rate > 0) {
             master_config.baudRate_Bps = baud_rate;
         }
diff --git a/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC54114/TARGET_LPCXpresso/PeripheralNames.h b/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC54114/TARGET_LPCXpresso/PeripheralNames.h
index b1fb1ce339..c92261c088 100644
--- a/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC54114/TARGET_LPCXpresso/PeripheralNames.h
+++ b/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC54114/TARGET_LPCXpresso/PeripheralNames.h
@@ -94,7 +94,7 @@ typedef enum {
     ADC0_SE11 = 11,
 } ADCName;
 
-
+#define SSELNUM_SHIFT    16
 typedef enum {
     SPI_0 = Flexcomm3,
     SPI_1 = Flexcomm5
diff --git a/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC54114/TARGET_LPCXpresso/PeripheralPins.c b/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC54114/TARGET_LPCXpresso/PeripheralPins.c
index dc222f2af9..b07d90f9ea 100644
--- a/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC54114/TARGET_LPCXpresso/PeripheralPins.c
+++ b/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC54114/TARGET_LPCXpresso/PeripheralPins.c
@@ -90,8 +90,8 @@ const PinMap PinMap_SPI_MISO[] = {
 
 const PinMap PinMap_SPI_SSEL[] = {
     {P0_14, SPI_0, 1},
-    {P1_1,  SPI_1, 4},
-    {P1_2,  SPI_1, 4},
+    {P1_1,  SPI_1, ((2 << SSELNUM_SHIFT) | 4)},
+    {P1_2,  SPI_1, ((3 << SSELNUM_SHIFT) | 4)},
     {NC  ,  NC   , 0}
 };
 
diff --git a/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC54114/TARGET_LPCXpresso/device.h b/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC54114/TARGET_LPCXpresso/device.h
index 3c4cd45e69..1de3f8a64e 100644
--- a/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC54114/TARGET_LPCXpresso/device.h
+++ b/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC54114/TARGET_LPCXpresso/device.h
@@ -29,8 +29,8 @@
      SYSCON_PDRUNCFG_PDEN_SRAM0_MASK | SYSCON_PDRUNCFG_PDEN_SRAM1_MASK | SYSCON_PDRUNCFG_PDEN_SRAM2_MASK)
 
 /* Defines used by the sleep code */
-#define LPC_CLOCK_INTERNAL_IRC BOARD_BootClockFRO12M
-#define LPC_CLOCK_RUN          BOARD_BootClockFROHF48M
+#define LPC_CLOCK_INTERNAL_IRC BOARD_BootClockFRO12M()
+#define LPC_CLOCK_RUN          BOARD_BootClockFROHF48M()
 
 #define DEVICE_ID_LENGTH       24
 
diff --git a/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC55S69/TARGET_LPCXpresso/PeripheralNames.h b/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC55S69/TARGET_LPCXpresso/PeripheralNames.h
index 65280c3729..5a7fff1298 100644
--- a/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC55S69/TARGET_LPCXpresso/PeripheralNames.h
+++ b/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC55S69/TARGET_LPCXpresso/PeripheralNames.h
@@ -104,6 +104,7 @@ typedef enum {
     CAN_1 = 1
 } CANName;
 
+#define SSELNUM_SHIFT    16
 typedef enum {
     SPI_0 = Flexcomm3,
     SPI_1 = Flexcomm7,
diff --git a/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC55S69/TARGET_LPCXpresso/PeripheralPins.c b/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC55S69/TARGET_LPCXpresso/PeripheralPins.c
index 2ccdba694b..f49cdb6f26 100644
--- a/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC55S69/TARGET_LPCXpresso/PeripheralPins.c
+++ b/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC55S69/TARGET_LPCXpresso/PeripheralPins.c
@@ -113,8 +113,8 @@ const PinMap PinMap_SPI_MISO[] = {
 
 const PinMap PinMap_SPI_SSEL[] = {
     {P0_4,  SPI_0, 8},
-    {P1_20, SPI_1, 1},
-    {P1_1,  SPI_2, 5},
+    {P1_20, SPI_1, ((1 << SSELNUM_SHIFT) | 1)},
+    {P1_1,  SPI_2, ((1 << SSELNUM_SHIFT) | 5)},
     {NC  ,  NC   , 0}
 };
 
diff --git a/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_MCU_LPC546XX/TARGET_FF_LPC546XX/PeripheralNames.h b/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_MCU_LPC546XX/TARGET_FF_LPC546XX/PeripheralNames.h
index 7efa1e5c20..bfa92505e9 100644
--- a/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_MCU_LPC546XX/TARGET_FF_LPC546XX/PeripheralNames.h
+++ b/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_MCU_LPC546XX/TARGET_FF_LPC546XX/PeripheralNames.h
@@ -100,6 +100,7 @@ typedef enum {
     CAN_1 = 1
 } CANName;
 
+#define SSELNUM_SHIFT    16
 typedef enum {
     SPI_0 = Flexcomm0,
     SPI_2 = Flexcomm2,
diff --git a/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_MCU_LPC546XX/TARGET_LPCXpresso/PeripheralNames.h b/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_MCU_LPC546XX/TARGET_LPCXpresso/PeripheralNames.h
index 5eacd5d1d9..0eaf69c994 100644
--- a/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_MCU_LPC546XX/TARGET_LPCXpresso/PeripheralNames.h
+++ b/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_MCU_LPC546XX/TARGET_LPCXpresso/PeripheralNames.h
@@ -100,6 +100,7 @@ typedef enum {
     CAN_1 = 1
 } CANName;
 
+#define SSELNUM_SHIFT    16
 typedef enum {
     SPI_0 = Flexcomm3,
     SPI_1 = Flexcomm9
diff --git a/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_MCU_LPC546XX/TARGET_LPCXpresso/PeripheralPins.c b/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_MCU_LPC546XX/TARGET_LPCXpresso/PeripheralPins.c
index 59702621e6..75aea9ab6f 100644
--- a/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_MCU_LPC546XX/TARGET_LPCXpresso/PeripheralPins.c
+++ b/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_MCU_LPC546XX/TARGET_LPCXpresso/PeripheralPins.c
@@ -107,7 +107,7 @@ const PinMap PinMap_SPI_MISO[] = {
 const PinMap PinMap_SPI_SSEL[] = {
     {P0_1,  SPI_0, 2},
     {P3_30, SPI_1, 1},
-    {P4_6,  SPI_1, 2},
+    {P4_6,  SPI_1, ((1 << SSELNUM_SHIFT) | 2)},
     {NC  ,  NC   , 0}
 };