diff --git a/arch/arm/src/armv7-m/nvic.h b/arch/arm/src/armv7-m/nvic.h
index 6bd842a76a..46837ab996 100644
--- a/arch/arm/src/armv7-m/nvic.h
+++ b/arch/arm/src/armv7-m/nvic.h
@@ -483,6 +483,26 @@
 #define NVIC_SYSH_PRIORITY_PR15_SHIFT   24
 #define NVIC_SYSH_PRIORITY_PR15_MASK    (0xff << NVIC_SYSH_PRIORITY_PR15_SHIFT)
 
+/* Vector Table Offset Register (VECTAB) */
+
+#define NVIC_VECTAB_TBLOFF_MASK         (0xffffffc0)
+#define NVIC_VECTAB_TBLBASE             (0)
+#define NVIC_VECTAB_ALIGN_MASK          (0x0000003f)
+
+/* Application Interrupt and Reset Control Register (AIRCR) */
+
+#define NVIC_AIRCR_VECTRESET            (1 << 0)  /* Bit 0:  VECTRESET */
+#define NVIC_AIRCR_VECTCLRACTIVE        (1 << 1)  /* Bit 1:  Reserved for debug use */
+#define NVIC_AIRCR_SYSRESETREQ          (1 << 2)  /* Bit 2:  System reset */
+                                                  /* Bits 2-7:  Reserved */
+#define NVIC_AIRCR_PRIGROUP_SHIFT       (8)       /* Bits 8-14: PRIGROUP */
+#define NVIC_AIRCR_PRIGROUP_MASK        (7 << NVIC_AIRCR_PRIGROUP_SHIFT)
+#define NVIC_AIRCR_ENDIANNESS           (1 << 15) /* Bit 15: 1=Big endian */
+#define NVIC_AIRCR_VECTKEY_SHIFT        (16)      /* Bits 16-31: VECTKEY */
+#define NVIC_AIRCR_VECTKEY_MASK         (0xffff << NVIC_AIRCR_VECTKEY_SHIFT)
+#define NVIC_AIRCR_VECTKEYSTAT_SHIFT    (16)      /* Bits 16-31: VECTKEYSTAT */
+#define NVIC_AIRCR_VECTKEYSTAT_MASK     (0xffff << NVIC_AIRCR_VECTKEYSTAT_SHIFT)
+
 /* System handler control and state register (SYSHCON) */
 
 #define NVIC_SYSHCON_MEMFAULTACT        (1 << 0)  /* Bit 0:  MemManage is active */
@@ -500,20 +520,6 @@
 #define NVIC_SYSHCON_BUSFAULTENA        (1 << 17) /* Bit 17: BusFault enabled */
 #define NVIC_SYSHCON_USGFAULTENA        (1 << 18) /* Bit 18: UsageFault enabled */
 
-/* Application Interrupt and Reset Control Register (AIRCR) */
-
-#define NVIC_AIRCR_VECTRESET            (1 << 0)  /* Bit 0:  VECTRESET */
-#define NVIC_AIRCR_VECTCLRACTIVE        (1 << 1)  /* Bit 1:  Reserved for debug use */
-#define NVIC_AIRCR_SYSRESETREQ          (1 << 2)  /* Bit 2:  System reset */
-                                                  /* Bits 2-7:  Reserved */
-#define NVIC_AIRCR_PRIGROUP_SHIFT       (8)       /* Bits 8-14: PRIGROUP */
-#define NVIC_AIRCR_PRIGROUP_MASK        (7 << NVIC_AIRCR_PRIGROUP_SHIFT)
-#define NVIC_AIRCR_ENDIANNESS           (1 << 15) /* Bit 15: 1=Big endian */
-#define NVIC_AIRCR_VECTKEY_SHIFT        (16)      /* Bits 16-31: VECTKEY */
-#define NVIC_AIRCR_VECTKEY_MASK         (0xffff << NVIC_AIRCR_VECTKEY_SHIFT)
-#define NVIC_AIRCR_VECTKEYSTAT_SHIFT    (16)      /* Bits 16-31: VECTKEYSTAT */
-#define NVIC_AIRCR_VECTKEYSTAT_MASK     (0xffff << NVIC_AIRCR_VECTKEYSTAT_SHIFT)
-
 /* Debug Exception and Monitor Control Register (DEMCR) */
 
 #define NVIC_DEMCR_VCCORERESET          (1 << 0)  /* Bit 0:  Reset Vector Catch */
diff --git a/arch/arm/src/armv7-m/up_ramvec_initialize.c b/arch/arm/src/armv7-m/up_ramvec_initialize.c
index 8ad4920c9e..4511e1b9ea 100644
--- a/arch/arm/src/armv7-m/up_ramvec_initialize.c
+++ b/arch/arm/src/armv7-m/up_ramvec_initialize.c
@@ -43,6 +43,8 @@
 
 #include "nvic.h"
 #include "ram_vectors.h"
+
+#include "chip.h"             /* May redefine VECTAB fields */
 #include "up_arch.h"
 #include "up_internal.h"
 
@@ -98,7 +100,7 @@ void up_ramvec_initialize(void)
 
   /* The vector table must be aligned */
 
-  DEBUGASSERT(((uintptr)g_ram_vectors & 0x3f) == 0);
+  DEBUGASSERT(((uintptr)g_ram_vectors & NVIC_VECTAB_ALIGN_MASK) == 0);
 
   /* Copy the ROM vector table at address zero to RAM vector table.
    *
@@ -114,11 +116,13 @@ void up_ramvec_initialize(void)
       *dest++ = *src++;
     }
 
-  /* Now configure the NVIC to use the new vector table.  Bit 29 indicates
-   * that the vector table is in RAM.
+  /* Now configure the NVIC to use the new vector table.  The TBLBASE bit
+   * indicates that the vectors are in RAM.  NOTE: These fields appear to
+   * differ among various ARMv7-M implementations.
    */
 
-  putreg32((uint32_t)g_ram_vectors | (1 << 29), NVIC_VECTAB);
+  putreg32(((uint32_t)g_ram_vectors & NVIC_VECTAB_TBLOFF_MASK) | NVIC_VECTAB_TBLBASE,
+           NVIC_VECTAB);
 }
 
 #endif /* !CONFIG_ARCH_RAMVECTORS */
diff --git a/arch/arm/src/lpc17xx/chip.h b/arch/arm/src/lpc17xx/chip.h
index 1f87c7b44d..4138ef9341 100644
--- a/arch/arm/src/lpc17xx/chip.h
+++ b/arch/arm/src/lpc17xx/chip.h
@@ -41,6 +41,7 @@
  ************************************************************************************/
 
 #include <nuttx/config.h>
+#include "nvic.h"
 
 /* Include the chip capabilities file */
 
@@ -60,6 +61,18 @@
 #  endif
 #endif
 
+/* Vector Table Offset Register (VECTAB).  Redefine some bits defined in
+ * arch/arm/src/armv7-m/nvic.h; The LPC178x/7x User manual definitions
+ * do not match the ARMv7M field definitions.
+ */
+
+#undef  NVIC_VECTAB_TBLOFF_MASK
+#define NVIC_VECTAB_TBLOFF_MASK         (0x3fffff00)
+#undef  NVIC_VECTAB_TBLBASE
+#define NVIC_VECTAB_TBLBASE             (1 << 29)
+#undef  NVIC_VECTAB_ALIGN_MASK
+#define NVIC_VECTAB_ALIGN_MASK          (0x000000ff)
+
 /* Include the memory map file.  Other chip hardware files should then include
  * this file for the proper setup.
  */