ATZB-X0-256-3-0-C_14 Datasheet, PDF (21/28 Pages) ATMEL Corporation – ZIGBIT 2.4GHZ WIRELESS MODULES

4.1 Handling Instructions
The ZigBit Modules are fixed with an EMI Shield to ensure compliance to Emission and Immunity rules. This shield is
galvanic and NOT air tight. So cleaning of the module with IPA / other similar agents is not advised. Humidity protection
coating (conformal) will cause deviated RF behavior and coating material being trapped inside EMI Shield. So this
should be avoided. For products requiring conformal coating, it is advised to suitably mask the ZigBit before applying
the coating to rest of the ZigBit carrier board. To protect ZigBit from humidity, the housing of the product should ensure
suitable Ingress Protection standards are complied with.
The MS-147 connector should never be exposed to varnish / similar conformal coating material which will affect
electrical connection on the surfaces of connector.
The in-built chip antenna has been tuned for the particular design
4.2 General Recommendations
• Metal enclosure should not be used. Using low profile enclosure might also affect antenna tuning
• Placing high profile components next to antenna should be avoided
• Having holes/vias punched around the periphery of the board eliminates parasitic radiation from the board edges
also distorting antenna pattern
• ZigBit module should not be placed next to consumer electronics which might interfere with ZigBit RF frequency
band
5. Persistence Memory
A dedicated memory space is allocated to store product specific information and called the Persistence Memory. The
organization of the persistence memory is as follows:
Table 5-1. Persistence Memory
Data
Structure Revision
MAC address⁽¹⁾
Board information overall
Board information – PCBA Name
Board information – PCBA Serial number
Board information – PCBA Atmel Part Number
Board information – PCBA Revision
Reserved
XTAL Calibration Value
Reserved
Reserved
CRC
Size
2 bytes
8 bytes
49 bytes
30 bytes
10 bytes
8 bytes
1 byte
3 bytes
1 byte
7 bytes
4 bytes
2 bytes
In ATZB-X0-256-3-0-C, the persistence memory is stored in User signature Row of Atxmega256A3U microcontroller
starting from address 0x0000. This section is not erased by chip erase and requires a dedicated erase command.
ATZB-X0-256-3-0-C ZigBit 2.4GHz Wireless Modules [DATASHEET] ¹⁷
42172B−WIRELESS−03/2014