diff --git a/configs/sam3u-ek/README.txt b/configs/sam3u-ek/README.txt
index 32d9943296d..b26b96e4a4a 100644
--- a/configs/sam3u-ek/README.txt
+++ b/configs/sam3u-ek/README.txt
@@ -581,6 +581,7 @@ Configuration sub-directories
             CONFIG_INPUT_ADS7843E=y           : Enable support for the XPT2048
             CONFIG_ADS7843E_SPIDEV=2          : Use SPI CS 2 for communication
             CONFIG_ADS7843E_SPIMODE=0         : Use SPI mode 0
+            CONFIG_ADS7843E_FREQUENCY=1000000 : SPI BAUD 1MHz
             CONFIG_ADS7843E_THRESHX=39        : These will probably need to be tuned
             CONFIG_ADS7843E_THRESHY=51
 
@@ -609,14 +610,11 @@ Configuration sub-directories
             CONFIG_DEBUG_INPUT=y              : Enable debug output from input devices
 
           STATUS:
-            2013-6-14: The touchscreen is not functional.  BUSY is initially
-            '0' when asserted says '1'.  The pend down GPIO inputis always
-            '1' and there seems to be many spurious interrupts (but not so
-            many as to lock up the system).
-
-            So there are GIO issues, but on the positive side, the driver
-            does appear to produce good touch data when touched but a lot
-            of clean-up is needed.
+            2013-6-16: The touchscreen is not functional. It seems to
+            perform good measurements but I am not getting the /PENIRQ
+            interrupt.  The interrupt is set up correctly (I can ground
+            A24 and I get the interrupt), so apparently the ADS7843E is
+            not generating interrupts.
 
   nx:
     Configures to use examples/nx using the HX834x LCD hardware on
diff --git a/configs/sam3u-ek/src/sam3u-ek.h b/configs/sam3u-ek/src/sam3u-ek.h
index af68df42a92..a9841dcc609 100644
--- a/configs/sam3u-ek/src/sam3u-ek.h
+++ b/configs/sam3u-ek/src/sam3u-ek.h
@@ -143,14 +143,19 @@
  *
  * The IRQ is active low and pulled up.
  *
+ * Pen Interrupt. Open anode output, requires 10kO to 100kO pull-up resistor
+ * externally.  There is a 100KO pull-up on the SAM3U-EK board so no additional
+ * pull-up should be required.
+ *
  * BUSY is high impedance when CS is high (not selected).  When CS is
  * is low, BUSY is active high.  Since the pin is pulled up, it will appear
- * busy if CS is not selected.
+ * busy if CS is not selected (there is no pull-up onboard).
  */
 
 #define GPIO_TCS_IRQ  (GPIO_INPUT | GPIO_CFG_PULLUP | GPIO_INT_BOTHEDGES | \
                        GPIO_PORT_PIOA | GPIO_PIN24)
-#define GPIO_TCS_BUSY (GPIO_INPUT | GPIO_CFG_PULLUP | GPIO_PORT_PIOA | GPIO_PIN2)
+#define GPIO_TCS_BUSY (GPIO_INPUT | GPIO_CFG_PULLUP | GPIO_PORT_PIOA | \
+                       GPIO_PIN2)
 
 #define SAM_TCS_IRQ   SAM_IRQ_PA24
 
@@ -165,10 +170,10 @@
 
 /* BUTTONS */
 
-#define GPIO_BUTTON1  (GPIO_INPUT | GPIO_CFG_PULLUP | GPIO_CFG_DEGLITCH | GPIO_INT_BOTHEDGES | \
-                       GPIO_PORT_PIOA | GPIO_PIN18)
-#define GPIO_BUTTON2  (GPIO_INPUT | GPIO_CFG_PULLUP | GPIO_CFG_DEGLITCH | GPIO_INT_BOTHEDGES | \
-                       GPIO_PORT_PIOA | GPIO_PIN19)
+#define GPIO_BUTTON1  (GPIO_INPUT | GPIO_CFG_PULLUP | GPIO_CFG_DEGLITCH | \
+                       GPIO_INT_BOTHEDGES | GPIO_PORT_PIOA | GPIO_PIN18)
+#define GPIO_BUTTON2  (GPIO_INPUT | GPIO_CFG_PULLUP | GPIO_CFG_DEGLITCH | \
+                       GPIO_INT_BOTHEDGES | GPIO_PORT_PIOA | GPIO_PIN19)
 
 #define IRQ_BUTTON1   SAM_IRQ_PA18
 #define IRQ_BUTTON2   SAM_IRQ_PA19
diff --git a/configs/sam3u-ek/src/up_touchscreen.c b/configs/sam3u-ek/src/up_touchscreen.c
index 46a814c6f20..41799d5e1d7 100644
--- a/configs/sam3u-ek/src/up_touchscreen.c
+++ b/configs/sam3u-ek/src/up_touchscreen.c
@@ -201,9 +201,9 @@ static bool tsc_busy(FAR struct ads7843e_config_s *state)
 
 static bool tsc_pendown(FAR struct ads7843e_config_s *state)
 {
-  /* REVISIT:  This might need to be inverted */
+  /* The /PENIRQ value is active low */
 
-  bool pendown = sam_gpioread(GPIO_TCS_IRQ);
+  bool pendown = !sam_gpioread(GPIO_TCS_IRQ);
   ivdbg("pendown:%d\n", pendown);
   return pendown;
 }