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Ver.0.10
13.5.2 Data Frame Transmit Operation
The following describes data frame transmit operation. The operations described below are
automatically performed in hardware.
(1) Selecting a transmit frame
The CAN module checks slots which have transmit requests (including remote frame transmit
slots) every intermission to determine the frame to transmit. If there are multiple transmit slots,
frames are transmitted in order of slot numbers beginning with the smallest.
(2) Transmitting a data frame
After determining the transmit slot, the CAN module sets the corresponding CAN Message Slot
Control Register's TRSTAT (Transmit/Receive Status) bit to 1, thereby starting transmission.
(3) If the CAN module lost bus arbitration or a CAN bus error occurs
If the CAN module lost bus arbitration or a CAN bus error occurs while transmitting, the CAN
module clears the CAN Message Slot Control Register's TRSTAT (Transmit/Receive Status) bit
to 0. If the CAN module requested a transmit abort, the transmit abort is accepted and writing to
the message slot is enabled.
(4) Completion of data frame transmission
When data frame transmission is completed, the CAN Message Slot Control Register's TRFIN
(Transmit/Receive Finished) bit and the CAN Slot Interrupt Status Register are set to 1. Also, a
time stamp count value at the time transmission was completed is written to the CAN Message
Slot Time Stamp (C0MSLnTSP), and the transmit operation is thereby completed.
If the CAN slot interrupt has been enabled, an interrupt request is generated at completion of
transmit operation. The slot which has had transmission completed goes to an inactive state and
remains inactive (neither transmit nor receive) until it is newly set in software.
CAN MODULE
13.5 Transmitting Data Frames
Summary of Contents for M32170F3VFP
Page 42: ...1 1 24 Ver 0 10 OVERVIEW 1 4 Pin Layout This is a blank page ...
Page 56: ...2 2 14 Ver 0 10 This is a blank page ...
Page 88: ...3 3 32 Ver 0 10 ADDRESS SPACE 3 7 Notes on Address Space This is a blank page ...
Page 270: ...9 9 40 Ver 0 10 DMAC 9 4 Precautions about the DMAC This is a blank page ...
Page 614: ...12 12 64 Ver 0 10 This is a blank page SERIAL I O 12 9 Precautions on Using UART Mode ...
Page 756: ...17 17 10 Ver 0 10 RAM BACKUP MODE 17 4 Exiting RAM Backup Mode Wakeup This is a blank page ...
Page 762: ...18 18 6 Ver 0 10 OSCILLATION CIRCUIT 18 2 Clock Generator Circuit This is a blank page ...
Page 831: ...CHAPTER 22 CHAPTER 22 TYPICAL CHARACTERISTICS 22 1 A D Conversion Characteristics ...
Page 833: ...Appendix 1 1 Dimensional Outline Drawing APPENDIX 1 APPENDIX 1 MECHANICAL SPECIFICATIONS ...
Page 841: ...Appendix 3 1 Precautions about Noise APPENDIX 3 APPENDIX 3 PRECAUTIONS ABOUT NOISE ...