MRF24WB0MA/MRF24WB0MB MRF24WB0MA/MRF24WB0MB RF Transceiver Module Errata and Data Sheet Clarification The MRF24WB0MA/MRF24WB0MB RF Transceiver Module that you have received conform functionally to the current Device Data Sheet (DS70632B), except for the anomalies described in this document. A detailed description and possible work around for each of the issues are available on page 2, following the Table 1 Module Issue Summary. Data Sheet clarifications and corrections are available on page 3, following the discussion of product issues. The product revision level can be identified by locating the seven digit manufacturing date code located on the module. Note: For more information on extracting the product date code, refer to the product Data Sheet or contact your local Microchip sales office. TABLE 1: MODULE ISSUE SUMMARY Item Number Affected Date Code Issue Summary <1039XXX ≥1039XXX >1108XXX 1. Power Save (PS) bit is set incorrectly in the PS-Poll frame. X 2. If the WPA or WPA2 keys are incorrectly entered, the host code will hang waiting to connect. X X 3. Large Beacon frames X X 4. TX Buffer not available X X X 5. High Traffic Loss Connection handling of X X X 6. High Traffic Probe request X X X TABLE 2: >1222XXX X DATE CODE FIRMWARE VERSION Version Date Code 1201 < 1013, some 1014, 1015 1204 > 1016 1205 >= 1039 1207 > 1108 120C > 1222 2010-2012 Microchip Technology Inc. DS80516C-page 1 MRF24WB0MA/MRF24WB0MB Module Errata Issues 4. Module: TX Buffer Not Available 1. Incorrect PS bit handling The Power Save (PS) bit is set incorrectly in the PS-Poll frame when the module comes out of Power Save (PS) mode. This causes some routers to revert the module back to PS mode disabling any data transfer. Work around This does not affect all routers; hence, there is no work around for those that respond to the PS bit within a PS-Poll frame. Affected Silicon Revisions <1039XXX There is a rare corner case when the module TX Buffer is not available to handle any further host management requests and will always return False to the MACIsTXReady() request causing a deadlock condition. Work around A watchdog timer must be used to detect the condition and reset the module when the event occurs. Affected Silicon Revisions <1039XXX ≥1039XXX >1108XXX >1222XXX X ≥1039XXX X X 5. Module: High Traffic Loss of Connection Handling X 2. Incorrect WPA error handling When the WPA or WPA2 keys are incorrectly entered, the module firmware asserts causing the host code to hang in a state waiting to connect to the module. Work around Detect a time-out condition when trying to connect through WPA or WPA2 and have the host code restart or send a failure message to the user. Affected Silicon Revisions ≥1039XXX X X >1108XXX Some (older) 1108xxx date code parts do not have the fix. 3. Module: Large Beacon Frames Some new platforms such as the iPhone 4 and some 802.11n routers send beacon frames larger than 128 bytes which can causes abnormal behavior and possible system failure. Work around None. Must update to 120A or greater. <1039XXX ≥1039XXX >1108XXX >1222XXX DS80516C-page 2 Do not use host scan or use watchdog timer to detect the condition and reset the module when the event occurs. Affected Silicon Revisions X X X 6. Module: High Traffic Probe Request When trying to establish a connection or reconnecting (automatic) in an extremely high traffic environment, the module may not get an opportunity to send a probe request which may cause the system to hang. Work around A watchdog timer must be used to detect the condition and reset the module when the event occurs. Affected Silicon Revisions Affected Silicon Revisions X Work around <1039XXX ≥1039XXX >1108XXX >1222XXX <1039XXX X When the module is connected to an AP and host initiates a scan, if the module cannot hear the AP, or the AP turns off, the module does not notify the host of the lost connection. X <1039XXX ≥1039XXX >1108XXX >1222XXX X X X 2010-2012 Microchip Technology Inc. MRF24WB0MA/MRF24WB0MB Data Sheet Clarifications The following typographic corrections and clarifications are to be noted for the latest version of the Device Data Sheet (DS70632B). 1. 2. 3. Operating temperature of part has been increased to -20°C to +85°C. SPI mode 3 is CPOL=CPHA=1 Debug serial interface operates at 19200, 8, N, 1, N 2010-2012 Microchip Technology Inc. DS80516C-page 3 MRF24WB0MA/MRF24WB0MB APPENDIX A: REVISION HISTORY Revision A Document (December 2010) This is the Initial release of the document. Issue 1 – Incorrect PS bit handling Issue 2 – Incorrect WPA error handling Revision B Document (May 2011) 1. 2. 3. Updated Table 1: Removed “Feature” column and added new column for Data Code. Updated Issue 1. Incorrect PS bit handling: Changed Affected Product Date Codes to Affected Silicon Revisions. Updated Issue 2. Incorrect WPA error handling: Changed Affected Product Date Codes to Affected Silicon Revisions, and added new data code. Revision C Document (September 2012) Added silicon issues 3 (Large Beacon Frames), 4 (TX Buffer Not Available), 5 (High Traffic Loss of Connection Handling), and 6 (High Traffic Probe Request). Added the “>1222XXX” Affected Date Code column in Table 1. Added Table 2. DS80516C-page 4 2010-2012 Microchip Technology Inc. Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property. • Microchip is willing to work with the customer who is concerned about the integrity of their code. • Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as “unbreakable.” Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act. Information contained in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer’s risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights. Trademarks The Microchip name and logo, the Microchip logo, dsPIC, KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro, PICSTART, PIC32 logo, rfPIC and UNI/O are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor, MXDEV, MXLAB, SEEVAL and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A. Analog-for-the-Digital Age, Application Maestro, BodyCom, chipKIT, chipKIT logo, CodeGuard, dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN, ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial Programming, ICSP, Mindi, MiWi, MPASM, MPLAB Certified logo, MPLIB, MPLINK, mTouch, Omniscient Code Generation, PICC, PICC-18, PICDEM, PICDEM.net, PICkit, PICtail, REAL ICE, rfLAB, Select Mode, Total Endurance, TSHARC, UniWinDriver, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. © 2010-2012, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper. ISBN: 978-1-62076-525-8 QUALITY MANAGEMENT SYSTEM CERTIFIED BY DNV == ISO/TS 16949 == 2010-2012 Microchip Technology Inc. Microchip received ISO/TS-16949:2009 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California and India. The Company’s quality system processes and procedures are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip’s quality system for the design and manufacture of development systems is ISO 9001:2000 certified. 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