Build date:		April 15, 2011
ZB version:		401B
EZNet version:		4.2 build 53 (GA, certified)


Fixes:
- Fixed associate LED issue, now is initially ON while its waiting to 
  associate to the network.
- Fixed issue with exiting AT mode after changing to AP1 mode of operation. 

New features:
- None.

Build date:		April 6, 2011
ZB version:		401A
EZNet version:		4.2 build 53 (GA, certified)


Fixes:
- Fixed problem of API vs. AT mode where the device doesn’t respond 
  after sending API frame with AP0 command. 


New features:
- None.

Build date:		March 28, 2011
ZB version:		4019
EZNet version:		4.2 build 53 (GA, certified)


Fixes:
- Fixed problem of SPI not responding after the device wakes up. Found 
  the SPI port needed to be re-initialized. 

Note: Excluded 4017 changes as code is under WDR bug investigation. 

New features:
- None.


Build date:		Feb 28, 2011
ZB version:		4018
EZNet version:		4.2 build 53 (GA, certified)


Fixes:
- Fixed problem of excessive current being sinked by the DTR/SLEEP REQ line 
  because of not being able to switch off the pull-down resistor. This fix 
  needed to be applied to both application and manufacturing test. 

Note: Excluded 4017 changes as code is under WDR bug investigation. 

New features:
- None.



Build date:		August 19, 2010
ZB version:		4016
EZNet version:		4.2 build 53 (GA, certified)

Fixes:
- This is the initial customer release


New features (which were not available on S2 and S2B platforms)
- Supports SPI slave mode as an alternative to the UART serial port,
  but usage of API mode is required.
- Six software images (Coordinator AT, Coordinator API, Router AT,
  Router API, End device AT, and End Device API) were combined into
  a single software image that supports everything previously available
  in the six software images.
- Fragmentation is now available in both API and and transparent mode
  for unicasts.  It continues to be unavailable for broadcasts.
- P3 (DOUT), P4 (DIN), D8 (SleepRq), and D9 (On-Sleep) are now
  available for I/O sampling.
- Both pull-up and pull-down resistors can now be applied to pins
  configured as digital inputs (3).
- Since this software runs on the EM357, more flash (192K bytes) and
  RAM (12K bytes) are available.  The extra RAM allows increased
  allocation of critical resources as follows:

Known bugs:
- The MISO line is not tri-stated when the slave select line is negated
  on the SPI interface.  Therefore, multiple slaves cannot be supported
  on the SPI without adding extra hardware external to the XBee.

  Ember Buffers:		88
  Address table size:		20 entries
  Routing table size:		80 entries
  Route discovery table size:	16 entries
  Source routes:		40 entries
  Neighbor table size:		20 entries
  Child table size:		20 entries