PIC18F1230/1330 PIC18F1230/1330 Rev. B0 Silicon Errata The PIC18F1230/1330 Rev. B0 parts you have received conform functionally to the Device Data Sheet (DS39758C), except for the anomalies described below. Any Data Sheet Clarification issues related to the PIC18F1230/1330 will be reported in a separate Data Sheet errata. Please check the Microchip web site for any existing issues. 2. Module: Enhanced Universal Synchronous Asynchronous Receiver Transmitter (EUSART) In rare situations, one or more extra bytes have been observed in a packet transmitted by the module operating in Asynchronous mode. The actual data is not lost or corrupted - only extra bytes are added. The extra bytes may be 0x00 or 0xFF. The following silicon errata apply only to PIC18F1230/1330 devices with these Device/ Revision IDs: Part Number Device ID Revision ID PIC18F1230 0001 1110 000 0 0110 PIC18F1330 0001 1110 001 0 0110 This situation occurs when the contents of the transmit buffer (TXREG) are transferred to the TSR at the end of the Stop bit period at the same time that firmware writes to TXREG. Note that TXIF is set at the beginning of the Stop bit period. The Device IDs (DEVID1 and DEVID2) are located at addresses 3FFFFEh:3FFFFFh in the device's configuration space. They are shown in binary in the format "DEVID2 DEVID1". Work around None. All of the issues listed here will be addressed in future revisions of the PIC18F1230/1330 silicon. 1. Module: Comparator The CMPxIF flag, which indicates when each comparator has a switched state, cannot be cleared immediately after reading CMCON. The mismatch condition that sets CMPxIF persists for 1 TCY after reading/writing CMCON. Date Codes that pertain to this issue: All engineering and production devices. 3. Module: Enhanced Universal Synchronous Asynchronous Receiver Transmitter (EUSART) In rare situations when interrupts are enabled, unexpected results may occur if: * The EUSART is disabled (the SPEN bit, RCSTA <7> = 0) * The EUSART is re-enabled (RCSTA <7> = 1) * A two-cycle instruction is executed Work around Insert a NOP instruction between reading/writing CMCON and clearing the CMPxIF flag. Date Codes that pertain to this issue: Work around All engineering and production devices. Add a 2 TCY delay after re-enabling the EUSART. 1. 2. 3. 4. Disable receive interrupts (RCIE bit, PIE1<5> = 0). Disable the EUSART (RCSTA <7> = 0). Re-enable the EUSART (RCSTA <7> = 1). Re-enable receive interrupts (PIE1<5> = 1). (This is the first TCY delay.) 5. Execute a NOP instruction. (This is the second TCY delay.) Date Codes that pertain to this issue: All engineering and production devices. (c) 2008 Microchip Technology Inc. DS80429A-page 1 PIC18F1230/1330 REVISION HISTORY Rev A Document (12/2008) Initial release of this errata. Includes silicon issues 1 (Comparator) and 2-3 (Enhanced Universal Synchronous Asynchronous Receiver Transmitter - EUSART). DS80429A-page 2 (c) 2008 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, Accuron, dsPIC, KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro, PICSTART, rfPIC, SmartShunt and UNI/O are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. FilterLab, Linear Active Thermistor, MXDEV, MXLAB, SEEVAL, SmartSensor 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, CodeGuard, dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN, ECONOMONITOR, FanSense, In-Circuit Serial Programming, ICSP, ICEPIC, Mindi, MiWi, MPASM, MPLAB Certified logo, MPLIB, MPLINK, mTouch, PICkit, PICDEM, PICDEM.net, PICtail, PIC32 logo, PowerCal, PowerInfo, PowerMate, PowerTool, REAL ICE, rfLAB, Select Mode, Total Endurance, 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. (c) 2008, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper. Microchip received ISO/TS-16949:2002 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(R) MCUs and dsPIC(R) DSCs, KEELOQ(R) 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. (c) 2008 Microchip Technology Inc. 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