PIC12F629/675 PIC12F629/675 Family Silicon Errata and Data Sheet Clarification The PIC12F629/675 family of devices that you have received conform functionally to the current Device Data Sheet (DS41190F), except for the anomalies described in this document. The silicon issues discussed in the following pages are for silicon revisions with the Device and Revision IDs listed in Table 1. The silicon issues are summarized in Table 2. The errata described in this document will be addressed in future revisions of the PIC12F629/675 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 2 apply to the current silicon revision (B0). For example, to identify the silicon revision level using MPLAB IDE in conjunction with MPLAB ICD 2 or PICkit™ 3: 1. 2. 3. 4. Note: Data Sheet clarifications and corrections start on page 4, following the discussion of silicon issues. The silicon revision level can be identified using the current version of MPLAB® IDE and Microchip’s programmers, debuggers, and emulation tools, which are available at the Microchip corporate web site (www.microchip.com). TABLE 1: Using the appropriate interface, connect the device to the MPLAB ICD 2 programmer/ debugger or PICkit™ 3. From the main menu in MPLAB IDE, select Configure>Select Device, and then select the target part number in the dialog box. Select the MPLAB hardware tool (Debugger>Select Tool). Perform a “Connect” operation to the device (Debugger>Connect). Depending on the development tool used, the part number and Device Revision ID value appear in the Output window. If you are unable to extract the silicon revision level, please contact your local Microchip sales office for assistance. The DEVREV values for the various PIC12F629/675 silicon revisions are shown in Table 1. SILICON DEVREV VALUES Part Number Device ID(1) Revision ID for Silicon Revision(2) A9 B0 PIC12F629 1111110 xxxxx 0F90h 0F8Bh PIC12F675 1111100 xxxxx 0FD0h 0FCBh Note 1: 2: The Device IDs (DEVID and DEVREV) are located at the last two implemented addresses of configuration memory space. They are shown in hexadecimal in the format “DEVID DEVREV”. Refer to the “PIC12F629/675 Flash Programming Specification” (DS41191) for detailed information on Device and Revision IDs for your specific device. © 2009 Microchip Technology Inc. DS80125H-page 1 PIC12F629/675 TABLE 2: SILICON ISSUE SUMMARY Module Data EEPROM Memory Power-on Reset Note 1: Feature Interrupt Flag — Item Number Affected Revisions(1) Issue Summary A9 B0 X 1. Inadvertently clears. X 2. Low VDD Level may fail to release the Reset. X Only those issues indicated in the last column apply to the current silicon revision. DS80125H-page 2 © 2009 Microchip Technology Inc. PIC12F629/675 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 (B0). 1. Module: Data EEPROM Memory The EEIF flag may be cleared inadvertently when performing operations on the PIR1 register, simultaneously with the completion of an EEPROM write. This condition occurs when the EEPROM write timer completes at the same moment that the PIR1 register operation is executed. Register operations are those that have the PIR1 register as the destination and include, but are not limited to, BSF, BCF, ANDWF, IORWF and XORWF. Work around 1. Avoid operations on the PIR1 register when writing to the EEPROM memory. 2. Poll the WR bit (EECON1<1>) to determine when the write is complete. 3. Use a timer interrupt to catch any instances when the EEIF flag is inadvertently cleared. The timer interrupt should be set longer than 8 ms. If EEIF fails, then the timer interrupt occurs as a default time out. The WR and WRERR flags are checked as part of the timer Interrupt Service Routine to verify the EEPROM write success. 4. If periodic interrupts are occurring in addition to the EEIF interrupts, then use a secondary flag to sense write completion. The secondary flag is set whenever EEPROM writes are active. An EEPROM write completion is indicated when the secondary flag is set and the WR flag is clear. 2. Module: Power-on Reset (Rising VDD Detect) The PIC12F629/675 Power-on Reset (POR) circuitry is sensitive to a low VDD level and may fail to release the Reset if VDD returns to an operational voltage after dropping to a very low level. The sensitive VDD condition occurs when VDD drops into an out-of-specification voltage region below the Brown-out Detect threshold and then recovers to a normal operating condition. The voltage region that can cause the problem is dependant upon temperature with the region growing as the temperature drops. A typical region is between 0.5 and 0.7V at -25°C. Below the region, the POR operates correctly. Above the region, the POR is inactive per the data sheet. Inside the region, the POR will assert Reset and will not release Reset until power is removed and VDD reaches VSS. Because the POR is independent of other Reset circuits (see Figure 9-4 of the data sheet), activating BOR or using the MCLR input will not eliminate the problem. Work around To resolve this problem, the application must be designed to assure that VDD reaches VSS. This is described as D003 VPOR in Section 12.0 “Electrical Specifications” of the Device Data Sheet (DS41190F). Affected Silicon Revisions A9 B0 X Affected Silicon Revisions A9 B0 X X © 2009 Microchip Technology Inc. DS80125H-page 3 PIC12F629/675 Data Sheet Clarification None. DS80125H-page 4 © 2009 Microchip Technology Inc. PIC12F629/675 APPENDIX A: DOCUMENT REVISION HISTORY Rev. A Document (3/2002) First revision of this document. Revised Table 12.3 Rev. B Document (9/2002) Added Module 1: “In-Circuit Serial Programming™”, changes made to the Typical In-Circuit Serial Programming Connection, Figure 9-18. Rev. C Document (04/02/04) Removed Table 12.3 and Figure 9-18 due to Data Sheet revisions. Added Module 1: “GPIO Port”, changes made to the TRISIO – GPIO Tri-state Register. Rev. D Document (11/2004) Added Module 1: “Data EEPROM Memory” for PIC12F629/675 silicon. Rev. E Document (07/2005) Data Sheet Clarifications/Corrections Section: Added Module 2: New 4x4 DFN Package added. Rev. F Document (10/2005) Data Sheet Clarifications/Corrections Section: Replaced 8-Lead Plastic Dual Flat No Lead Package 4x4 (DFN). Rev. G Document (8/2006) Added Module 2: “Power-on Reset (Rising VDD Detect)” for PIC12F629/675 silicon. Rev. H Document (6/2009) Updated the document with new format. Deleted Module 1 and 2 from the Data Sheet Clarification section. Updated Table 1 and 2. Other minor edits. © 2009 Microchip Technology Inc. DS80125H-page 5 PIC12F629/675 NOTES: DS80125H-page 6 © 2009 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, 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, CodeGuard, dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN, ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial Programming, ICSP, ICEPIC, Mindi, MiWi, MPASM, MPLAB Certified logo, MPLIB, MPLINK, mTouch, nanoWatt XLP, Omniscient Code Generation, PICC, PICC-18, PICkit, PICDEM, PICDEM.net, PICtail, PIC32 logo, REAL ICE, rfLAB, Select Mode, Total Endurance, TSHARC, 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. © 2009, 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® 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. © 2009 Microchip Technology Inc. DS80125H-page 7 WORLDWIDE SALES AND SERVICE AMERICAS ASIA/PACIFIC ASIA/PACIFIC EUROPE Corporate Office 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Technical Support: http://support.microchip.com Web Address: www.microchip.com Asia Pacific Office Suites 3707-14, 37th Floor Tower 6, The Gateway Harbour City, Kowloon Hong Kong Tel: 852-2401-1200 Fax: 852-2401-3431 India - Bangalore Tel: 91-80-3090-4444 Fax: 91-80-3090-4080 India - New Delhi Tel: 91-11-4160-8631 Fax: 91-11-4160-8632 Austria - Wels Tel: 43-7242-2244-39 Fax: 43-7242-2244-393 Denmark - Copenhagen Tel: 45-4450-2828 Fax: 45-4485-2829 India - Pune Tel: 91-20-2566-1512 Fax: 91-20-2566-1513 France - Paris Tel: 33-1-69-53-63-20 Fax: 33-1-69-30-90-79 Japan - Yokohama Tel: 81-45-471- 6166 Fax: 81-45-471-6122 Germany - Munich Tel: 49-89-627-144-0 Fax: 49-89-627-144-44 Atlanta Duluth, GA Tel: 678-957-9614 Fax: 678-957-1455 Boston Westborough, MA Tel: 774-760-0087 Fax: 774-760-0088 Chicago Itasca, IL Tel: 630-285-0071 Fax: 630-285-0075 Cleveland Independence, OH Tel: 216-447-0464 Fax: 216-447-0643 Dallas Addison, TX Tel: 972-818-7423 Fax: 972-818-2924 Detroit Farmington Hills, MI Tel: 248-538-2250 Fax: 248-538-2260 Kokomo Kokomo, IN Tel: 765-864-8360 Fax: 765-864-8387 Los Angeles Mission Viejo, CA Tel: 949-462-9523 Fax: 949-462-9608 Santa Clara Santa Clara, CA Tel: 408-961-6444 Fax: 408-961-6445 Toronto Mississauga, Ontario, Canada Tel: 905-673-0699 Fax: 905-673-6509 Australia - Sydney Tel: 61-2-9868-6733 Fax: 61-2-9868-6755 China - Beijing Tel: 86-10-8528-2100 Fax: 86-10-8528-2104 China - Chengdu Tel: 86-28-8665-5511 Fax: 86-28-8665-7889 Korea - Daegu Tel: 82-53-744-4301 Fax: 82-53-744-4302 China - Hong Kong SAR Tel: 852-2401-1200 Fax: 852-2401-3431 Korea - Seoul Tel: 82-2-554-7200 Fax: 82-2-558-5932 or 82-2-558-5934 China - Nanjing Tel: 86-25-8473-2460 Fax: 86-25-8473-2470 Malaysia - Kuala Lumpur Tel: 60-3-6201-9857 Fax: 60-3-6201-9859 China - Qingdao Tel: 86-532-8502-7355 Fax: 86-532-8502-7205 Malaysia - Penang Tel: 60-4-227-8870 Fax: 60-4-227-4068 China - Shanghai Tel: 86-21-5407-5533 Fax: 86-21-5407-5066 Philippines - Manila Tel: 63-2-634-9065 Fax: 63-2-634-9069 China - Shenyang Tel: 86-24-2334-2829 Fax: 86-24-2334-2393 Singapore Tel: 65-6334-8870 Fax: 65-6334-8850 China - Shenzhen Tel: 86-755-8203-2660 Fax: 86-755-8203-1760 Taiwan - Hsin Chu Tel: 886-3-6578-300 Fax: 886-3-6578-370 China - Wuhan Tel: 86-27-5980-5300 Fax: 86-27-5980-5118 Taiwan - Kaohsiung Tel: 886-7-536-4818 Fax: 886-7-536-4803 China - Xiamen Tel: 86-592-2388138 Fax: 86-592-2388130 Taiwan - Taipei Tel: 886-2-2500-6610 Fax: 886-2-2508-0102 China - Xian Tel: 86-29-8833-7252 Fax: 86-29-8833-7256 Thailand - Bangkok Tel: 66-2-694-1351 Fax: 66-2-694-1350 Italy - Milan Tel: 39-0331-742611 Fax: 39-0331-466781 Netherlands - Drunen Tel: 31-416-690399 Fax: 31-416-690340 Spain - Madrid Tel: 34-91-708-08-90 Fax: 34-91-708-08-91 UK - Wokingham Tel: 44-118-921-5869 Fax: 44-118-921-5820 China - Zhuhai Tel: 86-756-3210040 Fax: 86-756-3210049 03/26/09 DS80125H-page 8 © 2009 Microchip Technology Inc.