13
13-98
Rev.1.0
(7) Acceptance filtering
When data reception is completed, the CAN module searches for slots sequentially from slot 0 (up
to slot 15) that meet the receive conditions and are therefore eligible for the received message. The
following shows the receive conditions for the slots that have been set to receive a data frame.
[Conditions]
•
The received frame is a data frame.
•
The received ID and the slot ID are the same, with the ID mask register bits set to 0 being
ignored as "Don't care."
•
The standard and extended frame types are the same.
Note: When in BasicCAN mode, slots 14 and 15 cannot be used as transmit slots.
(8) When the receive conditions are met
When the receive conditions described in (7) above are met, the CAN module sets the CAN
Message Slot Control Register's TRSTAT (transmit/receive status) and TRFIN (transmit/receive
finished) bits to 1 and at the same time writes the received data to the message slot. If the TRFIN
(transmit/receive finished) bit is already 1 at this time, the ML (message lost) bit also is set to 1,
indicating that the message slot has been overwritten. The message slot has all of its ID and DLC
fields overwritten, with an indeterminate value written to its unused area (e.g., the extended ID
field when set for standard frame or an unused data field).
In addition, the time stamp count value at the time of message reception is written along with the
received data to the CAN Message Slot Time stamp Register (CMSLnTSP). When the CAN
module finishes writing to the message slot, it sets the CAN slot interrupt status bit to 1. If the slot
has been enabled for interrupt, it generates an interrupt and waits for the next frame to receive.
Note: If the CAN module receives a data frame before transmitting the remote frame, it stores
the received data frame and does not transmit the remote frame.
(9) When the receive conditions are not met
The CAN module discards the received frame and goes to the next transmit or receive operation.
It does not write to the message slot.
CAN MODULES
13.7 Transmitting Remote Frames
Содержание 32172
Страница 20: ... This is a blank page 16 ...
Страница 21: ...1 1 Overview 1 2 Block Diagram 1 3 Pin Functions 1 4 Pin Layout CHAPTER 1 CHAPTER 1 OVERVIEW ...
Страница 44: ...1 1 24 Rev 1 0 This is a blank page Overview 1 4 Pin Layout ...
Страница 58: ...2 2 14 Rev 1 0 This is a blank page CPU 2 6 Data Formats ...
Страница 122: ...4 4 26 Rev 1 0 This is a blank page EIT 4 13 Precautions on EIT ...
Страница 200: ...7 7 6 Rev 1 0 This is a blank page RESET 7 4 Precautions to Be Taken Immediately after Reset ...
Страница 240: ...8 8 40 Rev 1 0 This is a blank page INPUT OUTPUT PORTS AND PIN FUNCTIONS 8 5 Precautions on Input Output Ports ...
Страница 298: ...9 9 58 Rev 1 0 This is a blank page DMAC 9 4 Precautions on Using DMAC ...
Страница 416: ...10 10 118 Rev 1 0 This is a blank page INPUT OUTPUT TIMERS 10 6 TOM Output Related 16 bit Timers ...
Страница 658: ...14 14 16 Rev 1 0 REAL TIME DEBUGGER RTD 14 4 Typical Connection with the Host This is a blank page ...
Страница 718: ...16 16 16 Rev 1 0 This is a blank page D A CONVERTERS 16 3 Functional Description of the D A Converters ...
Страница 766: ...18 18 22 Rev 1 0 WAIT CONTROLLER 18 3 Typical Operation of the Wait Controller This is a blank page ...
Страница 776: ...19 19 10 Rev 1 0 RAM BACKUP MODE 19 4 Exiting RAM Backup Mode Wakeup This is a blank page ...
Страница 777: ...CHAPTER 20 CHAPTER 20 OSCILLATION CIRCUIT 20 1 Oscillator Circuit 20 2 Clock Generator Circuit ...
Страница 782: ...20 20 6 Rev 1 0 OSCILLATION CIRCUIT 20 2 Clock Generator Circuit This is a blank page ...
Страница 856: ...23 23 26 Rev 1 0 This is a blank page ELECTRICAL CHARACTERISTICS 23 6 AC Characteristics ...
Страница 857: ...24 1 A D Conversion Characteristics CHAPTER 24 CHAPTER 24 STANDARD CHARACTERISTICS ...
Страница 859: ...Appendix 1 1 Dimensional Outline Drawing APPENDIX 1 APPENDIX 1 MECHANICAL SPECIFICATIONS ...
Страница 861: ...Appendix 2 1 M32R E Instruction Processing Time APPENDIX 2 APPENDIX 2 INSTRUCTION PROCESSING TIME ...
Страница 865: ...Appendix 3 1 Precautions about Noise APPENDIX 3 APPENDIX 3 PRECAUTIONS ABOUT NOISE ...