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ZWIR4501
8 Limitations
This section gives an overview of the currently known issues with the ZWIR4501 samples.
Issue
Short Description / Reason
Temporary Workaround
Until New Release
Higher PER
Selectivity issues at high sensitivity
Use latest version of the
“Recommended Startup Register
Setup.” See section 5.17. *)
Detection of frames in
adjacent channel during
scan
A crosstalk from an adjacent channel could
cause a misinterpretation of scan result.
Use RSSI value as additional
information for right frame detection.
*) Contact ZMD’s support team ([email protected]) for further information.
9 Document Revision History
Revision
1.0
1.1
Description
Release date
First official release (ZMD44102)
25 Mar 2006
Changes to version 1.0 (besides minor corrections):
28 Aug 2006
Update sections "1.4 Pin Assignment" and "1.5 Pin Description" with
description of ATESTx, RFTEST and RFTESTPWR pins;
Correct DirectFifoAccess Mode description regarding mhrAckFc1Tx
register (section "4.5 Frame Handling");
Update "Off mode" description in section "4.11.1 Low Power Modes";
Rearrange section "4.11.1 Low Power Modes";
Update section "4.6 Link Quality Indicator (LQI)" regarding use of AgcLvl
value instead of LQI value that is stored in the RxFIFO;
Recommend to use the AgcLvl value to calculate the LQI value instead of
the two bytes that are stored after a received frame to the RxFIFO;
Update section "4.7 Receive Signal Strength Indicator (RSSI)" regarding
curve and approximation equation;
Update section "4.8 Energy Detection Level" regarding curve and
approximation equation;
Correct section "5.17 Recommended Startup Register Setup" regarding
recommended setting of the ED0_TRIM register value;
1.2
Add information about the order of the scan mode initialization sequence
in section “4.11.4 Scan Modes”;
4 Jun 2007
Update section “4.5 Frame Handling” and description of the T_SIFS and
the T_LIFS register regarding limitations in DirectFifoAccess mode;
Copyright © 2009, ZMD AG, ZWIR4501 Data Sheet and User Manual v.1.3 - August 19, 2009
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