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PIC16F631/677/685/687/689/690
PIC16F631/677/685/687/689/690 Rev. A Silicon/Data Sheet Errata
The PIC16F631/677/685/687/689/690 parts you have received conform functionally to the Device Data Sheet (DS41262C), except for the anomalies described below. All of the issues listed here will be addressed in future revisions of the PIC16F631/677/685/687/689/690 silicon. 1.4 Delay after auto-baud before transmit is allowed. After the auto-baud Sync character has been received and the RCIF flag is set, there is approximately 17 ms of delay before the transmitter is enabled. Work around After the RCIF flag is set indicating the baud rate has been measured, read the SPBRG register and write the value back to SPBRG. This will terminate the delay, and enable the transmitter module. 1.5 Auto-baud sequence cannot be aborted in some cases. If an auto-baud is started but no edges are received, there is no way to leave Auto-Baud mode. Work around Use the Watchdog Timer to reset the entire device. 1.6 Clearing SPEN does not reset EUSART state machine correctly. When SPEN is cleared, the entire EUSART is frozen. When SPEN is set, the EUSART resumes where it left off. This can cause some unexpected behavior. Work around To reset the EUSART, toggle TXEN and CREN after clearing SPEN. This will reset the transmit and receive state machines. 1.7 Extra character transmitted after autobaud. If TXEN is high when ABDEN is set, it will be cleared as soon as the auto-baud process begins, and reset as soon as the auto-baud process completes. When TXEN is reset, the character in the transmit queue will be transmitted. Work around Before starting auto-baud, clear TXEN. This will reset the transmit state machine correctly. After the auto-baud is complete and the firmware has brought TXEN high, no character will be transmitted.
1. Module: EUSART (PIC16F687/689/690 only)
1.1 WUE Bit is not clearing. After a wake-up due to a Break character, the WUE bit is not automatically cleared. Work around Clear the WUE bit after waking up. 1.2 Auto-baud captures the incorrect baud rate after a break. The SPBRGH:SPBRG registers are not being initialized correctly. If WUE and ABDEN are set at the same time and a Break character followed by a Sync character are received, then the calculated baud rate will be random. Work around Set WUE and wait for the wake-up to occur. Clear SPBRGH:SPBRG after waking up with the break. Set ABDEN to begin the auto-baud process. 1.3 Auto-baud calculates a baud rate value that is +2. The SPBRGH:SPBRG are not initialized correctly when ABDEN is set. This causes the measured baud rate to be high by two counts. Work around Clearing the SPBRGH:SPBRG registers will correctly initialize the baud rate counter. After the auto-baud has been completed, the baud rate will now be +1. The firmware should now subtract 1 from the baud rate generator to produce the correct baud rate.
(c) 2006 Microchip Technology Inc.
DS80243E-page 1
PIC16F631/677/685/687/689/690
1. Module: SSP (PIC16F687/689/690 only)
In any of the I2CTM modes, the SSP module will fail to recognize the first Start bit received after a transition from module disable to module enable. Subsequent Stop bits and Start bits are detected properly. Work around Enable the SSP module in SSPMSK Access mode before changing the mode to the desired I2C operation.
EXAMPLE 1:
MOVLW MOVWF
CODE EXAMPLE
;Module enable, clock ;enable, SSPMSK access. ;Optionally load ;address mask value ;into SSPMSK register. ;Module enable, clock ;enable, 7-bit address ;I2C slave.
B'00111001' SSPCON
MOVLW MOVWF
B'00110110' SSPCON
DS80243E-page 2
(c) 2006 Microchip Technology Inc.
PIC16F631/677/685/687/689/690
Clarifications/Corrections to the Data Sheet:
1. Module: 20-Pin QFN Pin Diagram Title
Change Title: PIC16F690 Pin Diagram (QFN) to PIC16F631/677/685/687/689/690 Pin Diagram (QFN), for the 20-pin QFN, on page 7.
REVISION HISTORY
Rev A Document (7/2005) Original release of this document. Clarifications/Corrections to the Data Sheet: Added Modules 1 through 7: Module 1: Device VDD Range Module 2: 4x4 QFN Package Marking Module 3: Table 1-1: Pinout Description - PIC16F685 Module 4: Register 10-5: EECON1 Module 5: Table11-2: Registers Associated with Capture, Compare and Timer1 Module 6: Section 12.0 EUSART Module 7: Section 14.2.2 MCLR Rev B Document (8/2005) Silicon Section: Added Module 1: EUSART (PIC16F687/689/690 only). Clarifications/Corrections to the Data Sheet: Added Modules 8 and 9: Module 8: SSP Module Overview Module 9: Electrical Specifications. Rev C Document (11/2005) Silicon Section: Added Module 2: SSP (PIC16F687/689/690 only) Rev D Document (01/2006) Clarifications/Corrections to the Data Sheet: Replaced the 20-Lead QFN package diagram in Module 2: 4x4 QFN Package Marking. Rev E Document (7/2006) Data Sheet Clarifications/Corrections Section: Removed Items 1 through 9, which have been incorporated into the data sheet. Added Item 1, 20-pin QFN Pin Diagram Title change.
(c) 2006 Microchip Technology Inc.
DS80243E-page 3
PIC16F631/677/685/687/689/690
NOTES:
DS80243E-page 4
(c) 2006 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, microID, MPLAB, PIC, PICmicro, PICSTART, PRO MATE, PowerSmart, rfPIC, and SmartShunt are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. AmpLab, FilterLab, Migratable Memory, 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, ECAN, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP, ICEPIC, Linear Active Thermistor, Mindi, MiWi, MPASM, MPLIB, MPLINK, PICkit, PICDEM, PICDEM.net, PICLAB, PICtail, PowerCal, PowerInfo, PowerMate, PowerTool, REAL ICE, rfLAB, rfPICDEM, Select Mode, Smart Serial, SmartTel, Total Endurance, UNI/O, 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) 2006, 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 Mountain View, California. The Company's quality system processes and procedures are for its PICmicro(R) 8-bit MCUs, 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) 2006 Microchip Technology Inc.
DS80243E-page 5
WORLDWIDE SALES AND SERVICE
AMERICAS
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 Atlanta Alpharetta, GA Tel: 770-640-0034 Fax: 770-640-0307 Boston Westborough, MA Tel: 774-760-0087 Fax: 774-760-0088 Chicago Itasca, IL Tel: 630-285-0071 Fax: 630-285-0075 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
ASIA/PACIFIC
Asia Pacific Office Suites 3707-14, 37th Floor Tower 6, The Gateway Habour City, Kowloon Hong Kong Tel: 852-2401-1200 Fax: 852-2401-3431 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: 86-28-8676-6200 Fax: 86-28-8676-6599 China - Fuzhou Tel: 86-591-8750-3506 Fax: 86-591-8750-3521 China - Hong Kong SAR Tel: 852-2401-1200 Fax: 852-2401-3431 China - Qingdao Tel: 86-532-8502-7355 Fax: 86-532-8502-7205 China - Shanghai Tel: 86-21-5407-5533 Fax: 86-21-5407-5066 China - Shenyang Tel: 86-24-2334-2829 Fax: 86-24-2334-2393 China - Shenzhen Tel: 86-755-8203-2660 Fax: 86-755-8203-1760 China - Shunde Tel: 86-757-2839-5507 Fax: 86-757-2839-5571 China - Wuhan Tel: 86-27-5980-5300 Fax: 86-27-5980-5118 China - Xian Tel: 86-29-8833-7250 Fax: 86-29-8833-7256
ASIA/PACIFIC
India - Bangalore Tel: 91-80-4182-8400 Fax: 91-80-4182-8422 India - New Delhi Tel: 91-11-4160-8631 Fax: 91-11-4160-8632 India - Pune Tel: 91-20-2566-1512 Fax: 91-20-2566-1513 Japan - Yokohama Tel: 81-45-471- 6166 Fax: 81-45-471-6122 Korea - Gumi Tel: 82-54-473-4301 Fax: 82-54-473-4302 Korea - Seoul Tel: 82-2-554-7200 Fax: 82-2-558-5932 or 82-2-558-5934 Malaysia - Penang Tel: 60-4-646-8870 Fax: 60-4-646-5086 Philippines - Manila Tel: 63-2-634-9065 Fax: 63-2-634-9069 Singapore Tel: 65-6334-8870 Fax: 65-6334-8850 Taiwan - Hsin Chu Tel: 886-3-572-9526 Fax: 886-3-572-6459 Taiwan - Kaohsiung Tel: 886-7-536-4818 Fax: 886-7-536-4803 Taiwan - Taipei Tel: 886-2-2500-6610 Fax: 886-2-2508-0102 Thailand - Bangkok Tel: 66-2-694-1351 Fax: 66-2-694-1350
EUROPE
Austria - Wels Tel: 43-7242-2244-3910 Fax: 43-7242-2244-393 Denmark - Copenhagen Tel: 45-4450-2828 Fax: 45-4485-2829 France - Paris Tel: 33-1-69-53-63-20 Fax: 33-1-69-30-90-79 Germany - Munich Tel: 49-89-627-144-0 Fax: 49-89-627-144-44 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
07/21/06
DS80243E-page 6
(c) 2006 Microchip Technology Inc.

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