490
CHAPTER 21 CAN CONTROLLER
21.6
Reception of CAN Controller
Reception starts when the start of data frame or remote frame (SOF) is detected on the
CAN bus.
■
Acceptance Filtering
The received message in the standard frame format is compared with the message buffer (x) set in the
standard frame format (IDEx of the IDE register (IDER) is 0). The received message in the extended frame
format is compared with the message buffer (x) set (IDEx is 1) in the extended frame format.
If all the bits set to Compare by the acceptance mask agree after comparison between the received message
ID and acceptance code (ID register (IDRx) for comparing with the received message ID), the received
message passes to the acceptance filter of the message buffer (x).
■
Storing Received Message
When the receive operation is successful, received messages are stored in a message buffer x including IDs
passed through the acceptance filter.
When receiving data frames, received messages are stored in the ID register (IDRx), DLC register
(DLCRx), and data register (DTRx).
Even if received message data is less than 8 bytes, some data is stored in the remaining bytes of the DTRx
and its value is undefined.
When receiving remote frames, received messages are stored only in the IDRx and DLCRx, and the DTRx
remains unchanged.
If there is more than 1 message buffer including IDs passed through the acceptance filter, the message
buffer x in which received messages are to be stored is determined according to the following rules.
•
The order of priority of the message buffer x (x = 0 to 15) rises as its number lower; in other words,
message buffer 0 is given the highest and the message buffer 15 is given the lowest priority.
•
Basically, message buffers with the RCx bit of 0 in the receive completion register (RCR) are preferred
in storing received messages.
•
If the bits of the acceptance mask select register (AMSR) are set to All Bits Compare (for message
buffers with the AMSx.1 and AMSx.0 bits set to 00
B
), received messages are stored irrespective of the
value of the RCx bit of the RCR.
•
If there are message buffers with the RCx bit of the RCR set to 0, or with the bits of the AMSR set to
All Bits Compare, received messages are stored in the lowest-number (highest-priority) message buffer
x.
•
If there are no message buffers above-mentioned, received messages are stored in a lower-number
message buffer x.
•
Message buffers should be arranged in ascending numeric order. The lowest message buffers should be
with All Bits Compare, then AMR0 or AMR1 masks. And The highest message buffers should be with
All Bits Mask.
Содержание F2MCTM-16LX
Страница 2: ......
Страница 3: ...FUJITSU LIMITED F2MCTM 16LX 16 BIT MICROCONTROLLER MB90360 Series HARDWARE MANUAL ...
Страница 4: ......
Страница 42: ...26 CHAPTER 1 OVERVIEW ...
Страница 66: ...50 CHAPTER 2 CPU MOV ILM imm8 The instruction is executed normally but the prefix affects the next instruction ...
Страница 70: ...54 CHAPTER 2 CPU ...
Страница 134: ...118 CHAPTER 6 CLOCK SUPERVISOR ...
Страница 176: ...160 CHAPTER 8 LOW POWER CONSUMPTION MODE ...
Страница 194: ...178 CHAPTER 10 I O PORTS ...
Страница 252: ...236 CHAPTER 13 16 Bit I O TIMER ...
Страница 282: ...266 CHAPTER 14 16 BIT RELOAD TIMER ...
Страница 295: ...279 CHAPTER 15 WATCH TIMER ORG 00FFDCH Reset vector set DSL START DB 00H Set to single chip mode VECT ENDS END START ...
Страница 296: ...280 CHAPTER 15 WATCH TIMER ...
Страница 386: ...370 CHAPTER 18 8 10 BIT A D CONVERTER ...
Страница 426: ...410 CHAPTER 20 LIN UART Figure 20 5 2 ORE Flag Set Timing RDRF ORE Reception data ...
Страница 540: ...524 CHAPTER 22 ADDRESS MATCH DETECTION FUNCTION ...
Страница 568: ...552 CHAPTER 24 512K BIT FLASH MEMORY ...
Страница 633: ...617 APPENDIX B Instructions Table B 9 3 Bit Operation Instruction Map first byte 6CH ...
Страница 634: ...618 APPENDIX Table B 9 4 Character String Operation Instruction Map first byte 6EH ...
Страница 635: ...619 APPENDIX B Instructions Table B 9 5 2 byte Instruction Map first byte 6FH MUL MULW DIVU A A A ...
Страница 637: ...621 APPENDIX B Instructions Table B 9 7 ea Instruction 2 first byte 71H ...
Страница 638: ...622 APPENDIX Table B 9 8 ea Instruction 3 first byte 72H ...
Страница 639: ...623 APPENDIX B Instructions Table B 9 9 ea Instruction 4 first byte 73H ...
Страница 640: ...624 APPENDIX Table B 9 10 ea Instruction 5 first byte 74H ...
Страница 641: ...625 APPENDIX B Instructions Table B 9 11 ea Instruction 6 first byte 75H ...
Страница 642: ...626 APPENDIX Table B 9 12 ea Instruction 7 first byte 76H ...
Страница 643: ...627 APPENDIX B Instructions Table B 9 13 ea Instruction 8 first byte 77H ...
Страница 644: ...628 APPENDIX Table B 9 14 ea Instruction 9 first byte 78H ...
Страница 645: ...629 APPENDIX B Instructions Table B 9 15 MOVEA RWi ea Instruction first byte 79H ...
Страница 646: ...630 APPENDIX Table B 9 16 MOV Ri ea Instruction first byte 7AH ...
Страница 647: ...631 APPENDIX B Instructions Table B 9 17 MOVW RWi ea Instruction first byte 7BH ...
Страница 648: ...632 APPENDIX Table B 9 18 MOV Ri ea Instruction first byte 7CH ...
Страница 649: ...633 APPENDIX B Instructions Table B 9 19 MOVW ea Rwi Instruction first byte 7DH ...
Страница 650: ...634 APPENDIX Table B 9 20 XCH Ri ea Instruction first byte 7EH ...
Страница 651: ...635 APPENDIX B Instructions Table B 9 21 XCHW RWi ea Instruction first byte 7FH ...
Страница 664: ...648 APPENDIX ...
Страница 665: ...649 INDEX INDEX The index follows on the next page This is listed in alphabetic order ...
Страница 682: ......