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MOTOROLA SEMICONDUCTOR TECHNICAL INFORMATION
68HC05X16MSE1
Mask Set Errata 1 68HC05X16 8-Bit Microcontroller Units
INTRODUCTION
This errata provides MCAN reset issue information applicable to the following 68HC05X16 MCU mask set devices: * D62J
MCU DEVICE MASK SET IDENTIFICATION
The mask set is identified by a four-character code consisting of a letter, two numerical digits, and a letter (e.g. D62J). Slight variations to the mask set identification code may result in an optional numerical digit preceding the standard four-character code (e.g. 0D62J).
MCU DEVICE DATE CODES
Device markings indicate the week of manufacture and the mask set used. The data is coded as four numerical digits where the first two digits indicate the year and the last two digits indicate the work week. The date code "9115" would indicate the 15th week of the year 1991.
MCU DEVICE PART NUMBER PREFIXES
Some MCU samples and devices are marked with an "SC","ZC" or "XC" prefix. An "SC" or "ZC" prefix denotes special/custom device. An "XC" prefix denotes device is tested but is not fully characterized or qualified over the full range of normal manufacturing process variations. After full characterization and qualification, devices will be marked with the "MC" prefix.
Whenever contacting a Motorola representative for assistance, please have the MCU device mask set and date code information available.
Specifications and information herein are subject to change without notice.
(c) Motorola, Inc., 1997
MSE Published Date: 1/21/97
MCAN RESET ISSUE
If the RR bit in CCNTRL is set during the transmission of a CAN message frame, there exists the possibility that the MCAN may permanently enter the reset state. This condition may only be recovered from by a MCU reset. This may occur if, during a particular MCAN transmission bit time, the transmit error counter reaches 256 or more, and the CPU sets the RR bit at the start of the last MCAN clock period of that same bit time. This issue may be avoided by not setting the RR bit during a MCAN message transmission, as described below. Correct Software Handling: Before setting the RR bit, check that a message is not being transmitted as follows: read CSTAT if TCS in CSTAT is clear: -- set AT in CCOM (use STA or STX) -- read CSTAT again if TS in CSTAT is set: wait until TS is clear (read CSTAT again) set RR in CCNTRL
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters which may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer.
Additional mask set erratas can be found on the World Wide Web at http://Design-NET.com/csic/TECHSPRT/TechSprt.htm.
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