MRF24XA MRF24XA Silicon Errata and Data Sheet Clarification The MRF24XA device that you have received conforms functionally to the current Device Data Sheet (DS70005023C), except for the anomalies described in this document. The silicon issues are summarized in Table 1. The errata described in this document will be addressed in future revisions of the MRF24XA silicon. Note: This document summarizes all silicon errata issues from all revisions of silicon, previous as well as current. Only the issues indicated in the last column of Table 1 apply to the current silicon revision (B1). TABLE 1: SILICON ISSUE SUMMARY Module Feature Item Number Affected Revisions Issue Summary B1 IT Auto Clear 1. Using short read on the PIRx registers does not always clear the interrupt flags. X MAC Auto-ACK 2. If the Auto-Acknowledgment feature is enabled, the minimum number of retransmissions is one. X MAC Auto-ACK 3. Auto-ACK MAC header is not completely IEEE 802.15.4™ 2006 Standard compliant. X PHY Streaming Mode 4. Even with good signal conditions, a high Packet Error Rate (PER) occurs when SPI activity is present during RX or TX. X Deep Sleep 5. During recovery from Deep Sleep mode, the device does not always restore the register values. X Interface Digital 2014-2015 Microchip Technology Inc. DS80000594B-page 1 MRF24XA Silicon Errata Issues Note: This document summarizes all silicon errata issues from all revisions of silicon, previous as well as current. Only the issues indicated by the shaded column in the following tables apply to the current silicon revision (B1). 1. Module: Interface Using short read on the PIRx registers does not always clear the Interrupt flags. Work around Use long read or block read to read the PIRx registers to ensure the IT flags are cleared. Affected Silicon Revisions B1 X 2. Module: MAC Some standards require one packet to be sent out on a given channel to determine if an ACK is received or not. If an ACK is present, then there is an active node on the channel and further communication begins. If an ACK is not present, the radio must try another channel without retransmitting on the first channel. When Auto-ACK is enabled, the radio will retransmit the packet at least once on the original channel if the ACK packet is missing. Work around Use the Software Acknowledge frame to be entirely standard compliant during active device discovery. Affected Silicon Revisions B1 X 3. Module: MAC According to the IEEE 802.15.5-2006 Standard, the Frame Control field of an ACK packet uses only two subfields: Frame Type and Frame Pending. All other subfields must be set to zero and ignored on reception. The Frame Version subfield in the Auto-ACK packet's Frame Control Field is 0b01, so it is not set to zero. DS80000594B-page 2 Work around Since this bit field has to be ignored in all receivers, Auto-ACK is fully functional and was tested with receivers from other vendors. If full compliance with the standard is required, use the Software Acknowledge frame. Affected Silicon Revisions B1 X 4. Module: PHY Even with good signal conditions, a high Packet Error Rate occurs when SPI activity is present during RX or TX. Work around Minimize SPI activity during Streaming mode by monitoring the TX Buffer Empty and RX Buffer Full bits on the GPIO pins. Use the GPIOMODE register to configure the GPIO pin accordingly. Use the radio with the lowest possible supply voltage in the application to reduce this effect. Significant PER improvement can be reached at 1.5V. Note that this effect is stronger on high data rates. Run PER tests to determine if the actual PER is acceptable for the application. Affected Silicon Revisions B1 X 5. Module: Digital During recovery from Deep Sleep mode, the device does not always restore register values. RDYIF is missing after wake-up or some of the restored values are corrupted. Work around Use a hardware reset followed by the recommended initialization sequence to recover from Deep Sleep. Affected Silicon Revisions B1 X Data Sheet Clarifications There are no typographic corrections and clarifications to be noted for the latest version of the device data sheet (DS70005023C). 2014-2015 Microchip Technology Inc. MRF24XA APPENDIX A: DOCUMENT REVISION HISTORY Rev A Document (01/2014) Initial release of this document. Rev B Document (03/2015) Added Module 5: Digital. 2014-2015 Microchip Technology Inc. DS80000594B-page 3 MRF24XA NOTES: DS80000594B-page 4 2014-2015 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, FlashFlex, flexPWR, JukeBlox, KEELOQ, KEELOQ logo, Kleer, LANCheck, MediaLB, MOST, MOST logo, MPLAB, OptoLyzer, PIC, PICSTART, PIC32 logo, RightTouch, SpyNIC, SST, SST Logo, SuperFlash and UNI/O are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. The Embedded Control Solutions Company and mTouch are registered trademarks of Microchip Technology Incorporated in the U.S.A. Analog-for-the-Digital Age, BodyCom, chipKIT, chipKIT logo, CodeGuard, dsPICDEM, dsPICDEM.net, ECAN, In-Circuit Serial Programming, ICSP, Inter-Chip Connectivity, KleerNet, KleerNet logo, MiWi, MPASM, MPF, MPLAB Certified logo, MPLIB, MPLINK, MultiTRAK, NetDetach, Omniscient Code Generation, PICDEM, PICDEM.net, PICkit, PICtail, RightTouch logo, REAL ICE, SQI, Serial Quad I/O, Total Endurance, TSHARC, USBCheck, VariSense, ViewSpan, WiperLock, Wireless DNA, 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. Silicon Storage Technology is a registered trademark of Microchip Technology Inc. in other countries. GestIC is a registered trademarks of Microchip Technology Germany II GmbH & Co. KG, a subsidiary of Microchip Technology Inc., in other countries. All other trademarks mentioned herein are property of their respective companies. © 2014-2015, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. ISBN: 978-1-63277-176-6 QUALITY MANAGEMENT SYSTEM CERTIFIED BY DNV == ISO/TS 16949 == 2014-2015 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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