X-Git-Url: http://git.linex4red.de/pub/lufa.git/blobdiff_plain/35bdada24b49c4dd1900a78a1595077b99814cf9..00d0883507efdc17688abafa75e81bf62f83d777:/LUFA/ManPages/CompileTimeTokens.txt

diff --git a/LUFA/ManPages/CompileTimeTokens.txt b/LUFA/ManPages/CompileTimeTokens.txt
index d8a7cf74a..e1f248d8f 100644
--- a/LUFA/ManPages/CompileTimeTokens.txt
+++ b/LUFA/ManPages/CompileTimeTokens.txt
@@ -80,6 +80,14 @@
  *  compatibility. If this token is defined, the structure element names are switched to the LUFA-specific but more descriptive
  *  names documented in the StdDescriptors.h source file.
  *
+ *  <b>USE_INTERNAL_SERIAL</b> - ( \ref Group_Descriptors ) \n
+ *  Some AVR models contain a unique 20-digit serial number which can be used as the device serial number, while in device mode. This
+ *  allows the host to uniquely identify the device regardless of if it is moved between USB ports on the same computer, allowing
+ *  allocated resources (such as drivers, COM Port number allocations) to be preserved. To make the library use this value for the
+ *  device's serial number, define this token in the project makefile, set it to a unique string descriptor index (i.e. one not used
+ *  elsewhere in the device for a string descriptor) and set the Device Descriptor's serial number descriptor index entry to the
+ *  USE_INTERNAL_SERIAL value.
+ *
  *  <b>FIXED_CONTROL_ENDPOINT_SIZE</b> - ( \ref Group_EndpointManagement ) \n
  *  By default, the library determines the size of the control endpoint (when in device mode) by reading the device descriptor.
  *  Normally this reduces the amount of configuration required for the library, allows the value to change dynamically (if