diff --git a/arch/arm/src/sama5/sam_timerisr.c b/arch/arm/src/sama5/sam_timerisr.c
index 70da7b7bce..1e24702103 100644
--- a/arch/arm/src/sama5/sam_timerisr.c
+++ b/arch/arm/src/sama5/sam_timerisr.c
@@ -52,11 +52,16 @@
 #include "chip/sam_pit.h"
 
 /****************************************************************************
- * Definitions
+ * Pre-processor Definitions
  ****************************************************************************/
-/* The PIT counter runs at a rate of the main clock (MCK) divided by 16 */
+/* The PIT counter runs at a rate of the main clock (MCK) divided by 16.
+ *
+ * On the SAMA5D4, the clocking to the PIC may be divided down from MCK.
+ * Perhaps because of H32MXDIV?  We will let the board.h tell us the correct
+ * PIT include clock by defining BOARD_PIT_FREQUENCY.
+ */
 
-#define PIT_CLOCK (BOARD_MCK_FREQUENCY >> 4)
+#define PIT_CLOCK (BOARD_PIT_FREQUENCY >> 4)
 
 /* The desired timer interrupt frequency is provided by the definition
  * CLK_TCK (see include/time.h).  CLK_TCK defines the desired number of
diff --git a/configs/sama5d3-xplained/include/board_384mhz.h b/configs/sama5d3-xplained/include/board_384mhz.h
index e297568033..08a26999bc 100644
--- a/configs/sama5d3-xplained/include/board_384mhz.h
+++ b/configs/sama5d3-xplained/include/board_384mhz.h
@@ -170,6 +170,7 @@
  * but not for the SAMA5D3.
  */
 
+#define BOARD_PIT_FREQUENCY        BOARD_MCK_FREQUENCY
 #define BOARD_USART_FREQUENCY      BOARD_MCK_FREQUENCY
 
 /* HSMCI clocking
diff --git a/configs/sama5d3-xplained/include/board_396mhz.h b/configs/sama5d3-xplained/include/board_396mhz.h
index f41e50f45c..ba76c021a0 100644
--- a/configs/sama5d3-xplained/include/board_396mhz.h
+++ b/configs/sama5d3-xplained/include/board_396mhz.h
@@ -128,6 +128,7 @@
  * but not for the SAMA5D3.
  */
 
+#define BOARD_PIT_FREQUENCY        BOARD_MCK_FREQUENCY
 #define BOARD_USART_FREQUENCY      BOARD_MCK_FREQUENCY
 
 #if defined(CONFIG_SAMA5_EHCI) || defined(CONFIG_SAMA5_OHCI) || \
diff --git a/configs/sama5d3-xplained/include/board_528mhz.h b/configs/sama5d3-xplained/include/board_528mhz.h
index 5d6d87a740..bc726b1c66 100644
--- a/configs/sama5d3-xplained/include/board_528mhz.h
+++ b/configs/sama5d3-xplained/include/board_528mhz.h
@@ -127,6 +127,7 @@
  * but not for the SAMA5D3.
  */
 
+#define BOARD_PIT_FREQUENCY        BOARD_MCK_FREQUENCY
 #define BOARD_USART_FREQUENCY      BOARD_MCK_FREQUENCY
 
 #if defined(CONFIG_SAMA5_EHCI) || defined(CONFIG_SAMA5_OHCI) || \
diff --git a/configs/sama5d3-xplained/include/board_sdram.h b/configs/sama5d3-xplained/include/board_sdram.h
index 42d3d1314a..4d7a63f261 100644
--- a/configs/sama5d3-xplained/include/board_sdram.h
+++ b/configs/sama5d3-xplained/include/board_sdram.h
@@ -66,6 +66,7 @@
  * but not for the SAMA5D3.
  */
 
+#define BOARD_PIT_FREQUENCY        BOARD_MCK_FREQUENCY
 #define BOARD_USART_FREQUENCY      BOARD_MCK_FREQUENCY
 
 #if defined(CONFIG_SAMA5_EHCI) || defined(CONFIG_SAMA5_OHCI) || \
diff --git a/configs/sama5d3x-ek/include/board_384mhz.h b/configs/sama5d3x-ek/include/board_384mhz.h
index d1bcbc40b4..057746fc1c 100644
--- a/configs/sama5d3x-ek/include/board_384mhz.h
+++ b/configs/sama5d3x-ek/include/board_384mhz.h
@@ -170,6 +170,7 @@
  * but not for the SAMA5D3.
  */
 
+#define BOARD_PIT_FREQUENCY        BOARD_MCK_FREQUENCY
 #define BOARD_USART_FREQUENCY      BOARD_MCK_FREQUENCY
 
 /* HSMCI clocking
diff --git a/configs/sama5d3x-ek/include/board_396mhz.h b/configs/sama5d3x-ek/include/board_396mhz.h
index f1dcd05fa7..f8e5309a5d 100644
--- a/configs/sama5d3x-ek/include/board_396mhz.h
+++ b/configs/sama5d3x-ek/include/board_396mhz.h
@@ -128,6 +128,7 @@
  * but not for the SAMA5D3.
  */
 
+#define BOARD_PIT_FREQUENCY        BOARD_MCK_FREQUENCY
 #define BOARD_USART_FREQUENCY      BOARD_MCK_FREQUENCY
 
 #if defined(CONFIG_SAMA5_EHCI) || defined(CONFIG_SAMA5_OHCI) || \
diff --git a/configs/sama5d3x-ek/include/board_528mhz.h b/configs/sama5d3x-ek/include/board_528mhz.h
index a1ad192aa8..27b69c0d29 100644
--- a/configs/sama5d3x-ek/include/board_528mhz.h
+++ b/configs/sama5d3x-ek/include/board_528mhz.h
@@ -127,7 +127,9 @@
  * but not for the SAMA5D3.
  */
 
+#define BOARD_PIT_FREQUENCY        BOARD_MCK_FREQUENCY
 #define BOARD_USART_FREQUENCY      BOARD_MCK_FREQUENCY
+
 #if defined(CONFIG_SAMA5_EHCI) || defined(CONFIG_SAMA5_OHCI) || \
     defined(CONFIG_SAMA5_UDPHS)
 
diff --git a/configs/sama5d3x-ek/include/board_sdram.h b/configs/sama5d3x-ek/include/board_sdram.h
index 561d9084b9..019005680f 100644
--- a/configs/sama5d3x-ek/include/board_sdram.h
+++ b/configs/sama5d3x-ek/include/board_sdram.h
@@ -66,6 +66,7 @@
  * but not for the SAMA5D3.
  */
 
+#define BOARD_PIT_FREQUENCY        BOARD_MCK_FREQUENCY
 #define BOARD_USART_FREQUENCY      BOARD_MCK_FREQUENCY
 
 #if defined(CONFIG_SAMA5_EHCI) || defined(CONFIG_SAMA5_OHCI) || \
diff --git a/configs/sama5d4-ek/include/board_384mhz.h b/configs/sama5d4-ek/include/board_384mhz.h
index 48df412b98..d1797e393b 100644
--- a/configs/sama5d4-ek/include/board_384mhz.h
+++ b/configs/sama5d4-ek/include/board_384mhz.h
@@ -169,6 +169,7 @@
  * REVISIT:  I am not sure why this is.  Perhaps because of H32MXDIV?
  */
 
+#define BOARD_PIT_FREQUENCY        (BOARD_MCK_FREQUENCY >> 1)
 #define BOARD_USART_FREQUENCY      (BOARD_MCK_FREQUENCY >> 1)
 
 /* HSMCI clocking
diff --git a/configs/sama5d4-ek/include/board_396mhz.h b/configs/sama5d4-ek/include/board_396mhz.h
index 978d88ebf7..58895ae328 100644
--- a/configs/sama5d4-ek/include/board_396mhz.h
+++ b/configs/sama5d4-ek/include/board_396mhz.h
@@ -127,6 +127,7 @@
  * REVISIT:  I am not sure why this is.  Perhaps because of H32MXDIV?
  */
 
+#define BOARD_PIT_FREQUENCY        (BOARD_MCK_FREQUENCY >> 1)
 #define BOARD_USART_FREQUENCY      (BOARD_MCK_FREQUENCY >> 1)
 
 #if defined(CONFIG_SAMA5_EHCI) || defined(CONFIG_SAMA5_OHCI) || \
diff --git a/configs/sama5d4-ek/include/board_528mhz.h b/configs/sama5d4-ek/include/board_528mhz.h
index 74c63cf599..31b05e36e9 100644
--- a/configs/sama5d4-ek/include/board_528mhz.h
+++ b/configs/sama5d4-ek/include/board_528mhz.h
@@ -126,6 +126,7 @@
  * REVISIT:  I am not sure why this is.  Perhaps because of H32MXDIV?
  */
 
+#define BOARD_PIT_FREQUENCY        (BOARD_MCK_FREQUENCY >> 1)
 #define BOARD_USART_FREQUENCY      (BOARD_MCK_FREQUENCY >> 1)
 
 #if defined(CONFIG_SAMA5_EHCI) || defined(CONFIG_SAMA5_OHCI) || \
diff --git a/configs/sama5d4-ek/include/board_sdram.h b/configs/sama5d4-ek/include/board_sdram.h
index 496cd52025..535bc91961 100644
--- a/configs/sama5d4-ek/include/board_sdram.h
+++ b/configs/sama5d4-ek/include/board_sdram.h
@@ -67,6 +67,7 @@
  * REVISIT:  I am not sure why this is.  Perhaps because of H32MXDIV?
  */
 
+#define BOARD_PIT_FREQUENCY        (BOARD_MCK_FREQUENCY >> 1)
 #define BOARD_USART_FREQUENCY      (BOARD_MCK_FREQUENCY >> 1)
 
 #if defined(CONFIG_SAMA5_EHCI) || defined(CONFIG_SAMA5_OHCI) || \