User Manual

ATZB-S1-256-3-0-U ZigBit 2.4GHz Single chip Wireless Module [DATASHEET]
42199AWIRELESS10/2013
14
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 UFL connector should never be exposed to Varnish / similar conformal coating material which will affect electrical
connection on the surfaces of connector.
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's 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
Size
Structure Revision
2 bytes
MAC address
(1)
8 bytes
Board information overall
49 bytes
Board information – PCBA Name
30 bytes
Board information – PCBA Serial number
10 bytes
Board information – PCBA Atmel Part Number
8 bytes
Board information – PCBA Revision
1 byte
Resereved
3 bytes
Xtal Calibration Value
1 byte
Reserved
7 bytes
Reserved
4 bytes
CRC
1 byte
In ATZB-S1-256-3-0-U persistence memory is stored in the User Signature Data (Page 1) of Atmega256RFR2 SoC with
starting address 0x0100. User Signature Data is isolated from the main flash and will not be cleared by Chip erase
Command.