V850ES/SG3, V850ES/SJ3
Contents
1. In the following C code example replace the objects in lt gt brackets by the hardware locations within your implementation Use the appropriate access types as described in the User s Manual WAKEUP INTERRUPT VECTOR gt lt CnCTRL PSMODE gt 0 Clear SLEEP Mode lt CnINTS CINTS5 gt 1 Clear INTSS5 following other parts of interrupt routine Note Clearing INTS5 is required to get another WAKEUP interrupt anyway by specification 4 2 Other WAKEUP Handling Hints 4 2 1 Switching off the Clock Supply to AFCAN while in SLEEP Mode If the clock supply to the AFCAN macro is stopped while it is in SLEEP mode the synchronisa tion of the WAKEUP works without any restriction To achieve this the documentation of clock controlling unit of the target device should be consulted Usually this is performed by setting the STOP mode of the CPU of the target device However the user has to consider that there must not be any WAKEUP condition dominant level on the CAN Bus while the software is executing between setting SLEEP mode and stopping the AFCAN clock 4 2 2 Using a Waiting Loop within the WAKEUP interrupt routine Within the WAKEUP interrupt routine create a waiting loop which tests the capability of clearing the WAKEUP interrupt flag within AFCAN by checking the actual power save mode In the following C code example replace the objects in lt gt brackets by the hardware locations within y2. property rights of third parties by or arising from the use of NEC PRODUCT S listed in this customer notification or any other liability arising from the use of such PRODUCT S No license express implied or otherwise is granted under any patents copyrights or other intellectual property rights of NEC or others Descriptions of circuits software and other related information in this customer notification are provided for illustrative purposes of PRODUCT S operation and or application examples only The incorporation of these circuits software and information in the design of customer s equipment shall be done under the full responsibility of customer NEC assumes no responsibility for any losses incurred by customers or third parties arising from the use of these circuits software and information While wherever feasible NEC endeavors to enhance the quality reliability and safe operation of PRODUCT S the customer agree and acknowledge that the possibility of defects and or erroneous thereof cannot be eliminated entirely To minimize risks of damage to property or injury including death to persons arising from defects and or errors in PRODUCT S the customer must incorporate sufficient safety measures in their design such as redundancy fire containment and anti failure features The customer agrees to indemnify NEC against and hold NEC harmless from any and all consequences of any and all claims suits actions or demands asserted against
3. Specification change notice v Not applicable X Applicable Note The rank is indicated by the letter appearing at the 5th position from the left in the lot number marked on each product 12 Customer Notification U18391EE2VOIFOO Operating Precautions for V850ES SG3 V850ES SJ3 uPD70F3346 uPD70F3356 uPD70F3366 1 0 Outline Setting of DTFR register Specification change notice TMP and TMQ Capture Operation Specification change notice Flash security flag setting Technical limitation Boot swap function of selfprogramming Technical limitation AFCAN Sleep Mode Wakeup Specification change notice v Not applicable X Applicable Note The rank is indicated by the letter appearing at the 5th position from the left in the lot number marked on each product Customer Notification U18391EE2VOIFOO 13 Operating Precautions for V850ES SG3 V850ES SJ3 TM uPD70F3347 uPD70F3357 uPD70F3367 Outline Setting of DTFR register Specification change notice TMP and TMQ Capture Operation Specification change notice Flash security flag setting Technical limitation Boot swap function of selfprogramming Technical limitation AFCAN Sleep Mode Wakeup Specification change notice v Not applicable X Applicable Note The rank is indicated by the letter appearing at the 5th position from the left in
4. or manufactured by or for NEC and or TOOLS TOOLS means hardware and or software development tools for NEC semiconductor products developed manufactured and supplied by NEC and or hardware and or software development tools supplied by NEC but developed and or manufactured by independent 3rd Party vendors worldwide as their own product or on contract from NEC 2 Customer Notification U18391EE2V0IF00 A B C D Operating Precautions for V850ES SG3 V850ES SJ3 Table of Operating Precautions 5 Description of Operating Precautions 16 Valid Specification io 9 59 SgS 00 0 9 5 en RAR R uses ansteniotasssicnas 23 REVISION HIStOlry sas sssmssmiensenuderaenmasantasah ist sed RRR sais 24 Customer Notification U18391EE2V0IF00 3 Operating Precautions for V850ES SG3 V850ES SJ3T Customer Notification U18391EE2VOIFOO Operating Precautions for V850ES SG3 V850ES SJ3 A Table of Operating Precautions uPD70F3333 uPD70F3335 Outline Setting of DTFR register Specification change notice TMP and TMQ Capture Operation Specification change notice Flash security flag setting Technical limitation Boot swap function of selfprogramming Technical limitation AFCAN Sleep Mode Wakeup Specification change notice v Not applicable X Applicable Note The rank is indicated by t
5. the lot number marked on each product 14 Customer Notification U18391EE2VOIFOO Operating Precautions for V850ES SG3 V850ES SJ3 uPD70F3348 uPD70F3358 uPD70F3368 1 0 Outline Setting of DTFR register Specification change notice TMP and TMQ Capture Operation Specification change notice Flash security flag setting Technical limitation Boot swap function of selfprogramming Technical limitation AFCAN Sleep Mode Wakeup Specification change notice v Not applicable X Applicable Note The rank is indicated by the letter appearing at the 5th position from the left in the lot number marked on each product Customer Notification U18391EE2VOIFOO 15 Operating Precautions for V850ES SG3 V850ES SJ3 TM B Description of Operating Precautions No 2 Setting of DTFR register Specification change notice Details When the DTFR register is written a DMA request may occur When rewriting the IFCn5 IFCn0 flags of the DTFR register the following bit may be set a DFn bit of the same register in which IFCn5 IFCn0 are set b DFm bit of a DMA channel with a lower priority than that of the DMA channel for which IFCn5 IFCn0 are set but only if IFCn5 1FCn0 are equal to IFCm5 IFCmo0 Workaround 1 Stop the DMA transmission of DMA channels that apply to the above description 2 Check if the DFn m bit corresponding to the above desc
6. 0ES SJ3 uPD70F3341 uPD70F3351 Rev Outline RankNote Setting of DTFR register Specification change notice TMP and TMQ Capture Operation Specification change notice Flash security flag setting Technical limitation Boot swap function of selfprogramming Technical limitation AFCAN Sleep Mode Wakeup Specification change notice v Not applicable X Applicable Note The rank is indicated by the letter appearing at the 5th position from the left in the lot number marked on each product 8 Customer Notification U18391EE2VOIFOO Operating Precautions for V850ES SG3 V850ES SJ3 uPD70F3342 uPD70F3352 Rev Outline RankNote Setting of DTFR register Specification change notice TMP and TMQ Capture Operation Specification change notice Flash security flag setting Technical limitation Boot swap function of selfprogramming Technical limitation AFCAN Sleep Mode Wakeup Specification change notice v Not applicable X Applicable Note The rank is indicated by the letter appearing at the 5th position from the left in the lot number marked on each product Customer Notification U18391EE2VOIFOO 9 Operating Precautions for V850ES SG3 V850ES SJ3 uPD70F3343 uPD70F3353 Rev Outline RankNote Setting of DTFR register Specification change notice TMP and TMQ Capture Operation Speci
7. 17790EJ2VOUD00 V850ES SJ3 Hardware Users Manual December 2006 U17728EJ2VOUD00 V850ES SG3 Hardware User s Manual April 2004 U15943EJ3VOUMOO V850ES Architecture Users Manual Customer Notification U18391EE2V0IF00 23 24 Operating Precautions for V850ES SG3 V850ES SJ3 TM D Revision History Date pulished Apr 26 2006 Document No TPS HE B 2580 Comment First release Jul 14 2006 TPS HE B 2581 Added item 4 added uPD70F3368 Sep 2006 TPS HE B 2582 Added item 5 added new device versions added version 1 1 for all actual devices modified descriptions 3 and 4 Oct 2006 U18391EE1VOIFOO Added table for 1M devices new document number format Mar 2007 U18391EE2VOIFO0 Added devices uPD70F3341 uPD70F3342 uPD70F3343 uPD70F3351 uPD70F3352 uPD70F3353 Customer Notification U18391EE2VOIFOO
8. NEC Customer Notification V850ES SG3 V850ES SJ3 32 bit Single Chip Microcontrollers Operating Precautions uPD70F3333 1PD70F3334 pPD70F3335 uPD70F3336 1PD70F3340 pPD70F3341 uPD70F3342 1PD70F3343 pPD70F3344 uPD70F3345 1PD70F3346 pPD70F3347 uPD70F3348 1PD70F3350 pPD70F3351 uPD70F3352 1PD70F3353 pPD70F3354 uPD70F3355 1PD70F3356 pPD70F3357 uPD70F3358 1PD70F3364 1PD70F3365 uPD70F3366 1PD70F3367 1PD70F3368 Document No U18391EE2V0IFOO Date Published March 2007 NEC Electronics Europe GmbH DISCLAIMER The related documents in this customer notification may include preliminary versions However preliminary versions may not have been marked as such The information in this customer notification is current as of its date of publication The information is subject to change without notice For actual design in refer to the latest publications of NEC s data sheets or data books etc for the most up to date specifications of NEC PRODUCT S Not all PRODUCT S and or types are available in every country Please check with an NEC sales representative for availability and additional information No part of this customer notification may be copied or reproduced in any form or by any means without prior written consent of NEC NEC assumes no responsibility for any errors that may appear in this customer notification NEC does not assume any liability for infringement of patents copyrights or other intellectual
9. NEC made by a third party for damages caused by one or more of the items listed in the enclosed table of content of this customer notification for PRODUCT S supplied after the date of publication Applicable Law The law of the Federal Republic of Germany applies to all information provided by NEC to the Customer under this Operating Precaution document without the possibility of recourse to the Conflicts Law or the law of gth July 1989 relating to the UN Convention on Contracts for the International Sale of Goods the Vienna CISG agreement D sseldorf is the court of jurisdiction for all legal disputes arising directly or indirectly from this information NEC is also entitled to make a claim against the Customer at his general court of jurisdiction If the supplied goods information are subject to German European and or North American export controls the Customer shall comply with the relevant export control regulations in the event that the goods are exported and or re exported If deliveries are exported without payment of duty at the request of the Customer the Customer accepts liability for any subsequent customs administration claims with respect to NEC Notes 1 NEC as used in this statement means NEC Electronics Corporation and also includes its direct or indirect owned or controlled subsidiaries 2 PRODUCT S means NEC semiconductor products NEC semiconductor products means any semiconductor product developed
10. ch switches off the clock of the AFCAN macro immediately after it had been set into SLEEP mode like the CPU STOP mode the precaution needs not to be considered This is associated with the software improvement hints below 3 3 Affected Applications 3 3 1 Applications not waiting until SLEEP mode is left If Bus Transceivers are used in conjunction with AFCAN which will propagate the CAN Bus sig nalto AFCAN permanently not switched off or not in power saving modes or if Bus Transceiv ers are used in conjunction with AFCAN which will propagate the unmodified CAN Bus signal when waking up from a power save mode the wakeup dead time lasts from the first recessive to dominant edge of the CAN Bus signal which generates the wake up until the next recessive to dominant edge of the CAN Bus signal The worst case maximum length of the wakeup dead time is given by the CAN bus speed and the rule of the CAN bus about the frequency of recessive to dominant edges Given by the stuff ing rule at least every 10 bits a recessive to dominant edge must occur If during the wakeup dead time the CPU waits until the SLEEP mode is indicated to be cleared either by polling the PSMODE flag or by retrying to clear CnINTS 5 this Operating Precau tion is not applicable In this case the Improvement Hint according to 4 2 2 is followed implicitly If during the wakeup dead time the CPU does not perform any access to the AFCAN macro in any ca
11. fication change notice Flash security flag setting Technical limitation Boot swap function of selfprogramming Technical limitation AFCAN Sleep Mode Wakeup Specification change notice v Not applicable X Applicable Note The rank is indicated by the letter appearing at the 5th position from the left in the lot number marked on each product 10 Customer Notification U18391EE2VOIFOO Operating Precautions for V850ES SG3 V850ES SJ3 uPD70F3344 uPD70F3354 uPD70F3364 Outline Setting of DTFR register Specification change notice TMP and TMQ Capture Operation Specification change notice Flash security flag setting Technical limitation Boot swap function of selfprogramming Technical limitation AFCAN Sleep Mode Wakeup Specification change notice vV Not applicable X Applicable Note The rank is indicated by the letter appearing at the 5th position from the left in the lot number marked on each product Customer Notification U18391EE2V0IF00 11 Operating Precautions for V850ES SG3 V850ES SJ3 TM uPD70F3345 uPD70F3355 uPD70F3365 Outline Setting of DTFR register Specification change notice TMP and TMQ Capture Operation Specification change notice Flash security flag setting Technical limitation Boot swap function of selfprogramming Technical limitation AFCAN Sleep Mode Wakeup
12. flowchart illustrates how and whether additional measures have to be taken in soft ware to avoid the wakeup dead time AFCAN sleep mode In case AFCAN Clock is disabled In case AFCAN Clock is active Releasing AFCAN sleep mode Releasing AFCAN sleep mode by CAN bus activity by CAN bus activity Releasing AFCAN sleep mode After detected dominant edge After detected dominant edge by user PSMODEO 0 PSMODEO 0 1 CINTS5 1 CINTS5 1 Clear PSMODEO bit Additional Measure Clear CINTSS bit Clear CINTSS bit Clear PSMODEO bit Figure 3 1 Additional Measures in case AFCAN clock is active when waking up 3 2 Not affected Applications 3 2 1 Applications not using SLEEP mode If SLEEP mode is not used this Operating Precaution is not applicable 3 2 2 Applications waking up from SLEEP mode by User Request only If there is no condition when SLEEP mode can be left by CAN Bus activity but only on User Request by clearing the PSMODE flag by software this Operating Precaution is not applica ble Customer Notification U18391EE2VOIFOO 19 20 No 5 Operating Precautions for V850ES SG3 V850ES SJ3 TM AFCAN Sleep Mode Wakeup Specification change notice 3 2 3 Applications using a CPU Power Save Mode If the clock to the AFCAN macro is disabled while it is woken up from SLEEP mode this Operat ing Precaution is not applicable This means if the user selects a power save mode of the target device whi
13. he letter appearing at the 5th position from the left in the lot number marked on each product Customer Notification U18391EE2VOIFOO 5 Operating Precautions for V850ES SG3 V850ES SJ3 uPD70F3334 uPD70F3336 Rev Outline RankNote Setting of DTFR register Specification change notice TMP and TMQ Capture Operation Specification change notice Flash security flag setting Technical limitation Boot swap function of selfprogramming Technical limitation AFCAN Sleep Mode Wakeup Specification change notice vZ Not applicable X Applicable Note The rank is indicated by the letter appearing at the 5th position from the left in the lot number marked on each product 6 Customer Notification U18391EE2VOIFOO Operating Precautions for V850ES SG3 V850ES SJ3 uPD70F3340 uPD70F3350 1 0 Outline Setting of DTFR register Specification change notice TMP and TMQ Capture Operation Specification change notice Flash security flag setting Technical limitation Boot swap function of selfprogramming Technical limitation AFCAN Sleep Mode Wakeup Specification change notice v Not applicable X Applicable Note The rank is indicated by the letter appearing at the 5th position from the left in the lot number marked on each product Customer Notification U18391EE2VOIFOO 7 Operating Precautions for V850ES SG3 V85
14. ns e SLEEP Mode of AFCAN is used and the possibility to wake up AFCAN by CAN Bus events is given see Remarks 1 e During SLEEP mode of the AFCAN macro a CAN Bus wakeup condition occurs while the AFCAN macro is supplied with clock see Remarks 2 and after waking up from SLEEP mode of the AFCAN macro the application software does not wait until the SLEEP mode is released by polling the CnCTRL PSMODE register before continuing operation with the AFCAN macro see Remarks 3 and the CPU can reach instructions where AFCAN registers are accessed while the AFCAN macro is still in SLEEP mode due to the missing waiting condition s During SLEEP mode of the AFCAN macro a CAN Bus wakeup condition occurs while the AFCAN macro is supplied with clock see Remarks 2 and after waking up from SLEEP mode of the AFCAN macro the CAN Bus Transceiver generates a long lasting or permanent dominant level to the CRXD input of the AFCAN macro instead of the propagated CAN Bus level Remarks 1 If the CAN Bus Transceiver does not propagate the CAN Bus signal while the AFCAN macro is in SLEEP mode and also does not forward a wakeup signal to CRXD this Operating Precaution is not applicable 2 The clock supply to the AFCAN macro can be stopped depending on the features of the device and the system design of the application If the clock supply to the AFCAN macro is stopped while a wakeup condition occurs this Operating Pre caution is n
15. ot applicable 3 The maximum waiting time for this loop can be up to 10 bits of the CAN Bus Baudrate Waiting while retrying to clear CnINTS Bit 5 can be used alternatively All other applications are not affected by this Operating Precaution 2 Description When the AFCAN macro is set into SLEEP mode it can be woken up by CAN bus activity This waking up is asynchronous to the operation of the macro and the CPU By configuration set ting a WAKEUP interrupt can be generated by the AFCAN macro on the wakeup event While the interrupt is generated asynchronously the AFCAN macro may need another dominant edge on the CAN bus or software clearing of the SLEEP mode in order to restart its synchronous operation During the time after the interrupt already has been indicated and before the CAN macro has restarted its synchronous operation the registers of the AFCAN macro will not operate because the AFCAN macro still remains in SLEEP mode This time we will refer to as wakeup dead time in the following context Customer Notification U18391EE2VOIFOO Operating Precautions for V850ES SG3 V850ES SJ3 AFCAN Sleep Mode Wakeup Specification change notice To resolve from the wakeup dead time software and or hardware measures are required Note However this Precaution does not apply to all applications Only dedicated applications are affected see above 3 Application Dependency 3 1 Overview The following
16. our implementation Use the appropriate access types as described in the User s Manual Customer Notification U18391EE2VOIFOO 21 Operating Precautions for V850ES SG3 V850ES SJ3 TM 22 No 5 AFCAN Sleep Mode Wakeup Specification change notice do AFCAN SleepStatus lt CnCTRL PSMODE gt if AFCAN SleepStatus 0 macro is still in SLEEP mode waiting for latency time lt CnINTS CINTS5 gt 1 repeated trying to clear CINTS5 while AFCAN SleepStatus 0 This improvement hint cannot be applied if a CAN Bus Transceiver is attached to AFCAN which generates a permanent or long lasting dominant level to the CRXD AFCAN receive input if a wakeup condition occurs Missing another dominant edge on the bus the synchronisation will not happen and the loop could run endlessly 4 2 3 Using INIT Mode instead of SLEEP Mode In this case the waking up by CAN Bus activity must be performed via another free Pin I O Inter rupt Probably the RX signal of CAN must be distributed on the CRXD of the AFCAN macro and another Pin I O in parallel Using this Pin I O Interrupt the AFCAN macro can be put back into the previous Operation mode This implementation will not use the SLEEP mode of AFCAN at all and use the INIT mode instead Customer Notification U18391EE2VOIFOO Operating Precautions for V850ES SG3 V850ES SJ3 C Valid Specification Date pulished Document No Document Title December 2006 U
17. ription is O after rewriting IFCn5 IFCn0 TMP and TMQ Capture Operation Specification change notice Details When the input capture function is selected for Timer P or Timer Q and a clock of fxx 8 or slower is selected as the count clock for this timer the following applies When a capture signal is input during the first count clock after TPnCE 1 for Timer P TQnCE 1 for Timer Q resprectively the capture operation is not executed and the corresponding capture interrupt is not issued Workaround There is no workaround 16 Flash security flag setting Technical limitation Details It may not be possible to use or clear the security flag of the flash memory Workaround There is no workaround Do not use the security flag setting function in the flash programmer Customer Notification U18391EE2VOIFOO Operating Precautions for V850ES SG3 V850ES SJ3 Boot swap function of selfprogramming Technical limitation Details It may not be possible to use the boot swap function in selfprogramming mode Workaround There is no workaround Do not use the boot swap function Customer Notification U18391EE2VOIFOO 17 18 Operating Precautions for V850ES SG3 V850ES SJ3 TM AFCAN Sleep Mode Wakeup Specification change notice Details 1 Exclusions This Operating Precaution is only applicable to applications which are fulfilling at least one of the following three conditio
18. se this Operating Precaution is not applicable 3 3 2 Applications using Bus Transceivers generating long lasting dominant CAN Bus Sig nals If Bus Transceivers are used in conjunction with AFCAN which generate a permanent or long lasting dominant level when waking up from a power save mode the Operating Precaution must be considered in any case In this case the wakeup dead time lasts from the first recessive to dominant edge of the CAN Bus signal which generates the wake up until the next recessive to dominant edge of the CAN Bus signal depending on the behaviour of the CAN Bus Transceiver If no further dominant edge on the CAN bus occurs in case of some CAN Transceivers which only provide one single edge on waking up the time until SLEEP mode is left may become end less Therefore the waking up procedure of AFCAN regarding software must be adjusted according to 4 1 1 Customer Notification U18391EE2VOIFOO No 5 Operating Precautions for V850ES SG3 V850ES SJ3 AFCAN Sleep Mode Wakeup Specification change notice 4 Software Improvement Hints 4 1 Recommended WAKEUP Handling by Software 4 1 1 Clearing the SLEEP Mode by Software Within the WAKEUP interrupt routine before accessing any other register or area of AFCAN the SLEEP mode can be canceled by software followed by a clearance of the WAKEUP interrupt flag Doing so the AFCAN macro will start its synchronous operation right after these accesses
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