diff --git a/arch/arm/src/samv7/chip/samv71_pinmap.h b/arch/arm/src/samv7/chip/samv71_pinmap.h
index f5dd8fc877b..b49cde7f5cf 100644
--- a/arch/arm/src/samv7/chip/samv71_pinmap.h
+++ b/arch/arm/src/samv7/chip/samv71_pinmap.h
@@ -1,5 +1,5 @@
 /************************************************************************************
- * arch/arm/src/sam34/chip/samv71_pinmap.h
+ * arch/arm/src/samv7/chip/samv71_pinmap.h
  *
  *   Copyright (C) 2015 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
@@ -33,8 +33,8 @@
  *
  ************************************************************************************/
 
-#ifndef __ARCH_ARM_SRC_SAMV7_CHIP_SAM4E_PINMAP_H
-#define __ARCH_ARM_SRC_SAMV7_CHIP_SAM4E_PINMAP_H
+#ifndef __ARCH_ARM_SRC_SAMV7_CHIP_SAMV71_PINMAP_H
+#define __ARCH_ARM_SRC_SAMV7_CHIP_SAMV71_PINMAP_H
 
 /************************************************************************************
  * Included Files
@@ -571,4 +571,4 @@ extern "C"
 #endif
 
 #endif /* __ASSEMBLY__ */
-#endif /* __ARCH_ARM_SRC_SAMV7_CHIP_SAM4E_PINMAP_H */
+#endif /* __ARCH_ARM_SRC_SAMV7_CHIP_SAMV71_PINMAP_H */
diff --git a/configs/samv71-xult/README.txt b/configs/samv71-xult/README.txt
index 57cb52cdb28..a52fe1ee181 100644
--- a/configs/samv71-xult/README.txt
+++ b/configs/samv71-xult/README.txt
@@ -112,6 +112,19 @@ use either the VCOM or an external RS-232 driver.  Here are some options.
       2    PD30   TX0     1       UTXD3
     ------ ------ ------- ------- --------
 
+    In this configuration, an external RS232 driver can also be used
+    instead of the shield.  Simply connext as follows:
+
+    --------- -----------
+    Arduino   RS-232
+    Pin Label Connection
+    --------- -----------
+    D0 (RXD)  RX
+    D1 (TXD)  TX
+    GND       GND
+    5VO       Vcc
+    --------- -----------
+
   - SAMV7-XULT EXTn connectors.  USART pins are also available the EXTn
     connectors.  The following are labelled in the User Guide for USART
     functionality: