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13-71
Ver.0.10
13.7.2 Remote Frame Transmit Operation
The following describes remote frame transmit operation. The operations described below are
automatically performed in hardware.
(1) Setting the RA (Remote Active) bit
At the same time H'A0 (Transmit Request, Remote) is written to the CAN Message Slot Control
Register, the RA (Remote Active) bit is set to 1, indicating that the corresponding slot is to handle
remote frames.
(2) Selecting a transmit frame
The CAN module checks slots which have transmit requests (including data 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.
(3) Transmitting a remote 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.
(4) 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.
(5) Completion of remote frame transmission
When remote frame transmission is completed, a time stamp count value at the time
transmission was completed is written to the CAN Message Slot Time Stamp (C0MSLnTSP) and
the CAN Message Slot Control Register's RA (Remote Active) bit is cleared to 0. Also, the CAN
Slot Interrupt Status bit is set to 1 by completion of transmission, but the CAN Message Slot
Control Register's TRFIN (Transmit/Receive Finished) bit is not set to 1. If the CAN slot interrupt
has been enabled, an interrupt request is generated upon completion of transmission.
(6) Receiving a data frame
When remote frame transmission is completed, the slot automatically starts functioning as a data
frame receive slot.
(7) Acceptance filtering
When the CAN module finished receiving data, it starts searching for the slot that satisfies
conditions for receiving the received message sequentially from slot 0 (up to slot 15).
CAN MODULE
13.7 Transmitting Remote Frames
Содержание M32170F3VFP
Страница 19: ...CHAPTER 1 CHAPTER 1 OVERVIEW 1 1 Outline of the 32170 1 2 Block Diagram 1 3 Pin Function 1 4 Pin Layout ...
Страница 42: ...1 1 24 Ver 0 10 OVERVIEW 1 4 Pin Layout This is a blank page ...
Страница 56: ...2 2 14 Ver 0 10 This is a blank page ...
Страница 88: ...3 3 32 Ver 0 10 ADDRESS SPACE 3 7 Notes on Address Space This is a blank page ...
Страница 192: ...6 6 58 Ver 0 10 INTERNAL MEMORY 6 9 Precautions to Be Taken When Rewriting Flash Memory This is a blank page ...
Страница 270: ...9 9 40 Ver 0 10 DMAC 9 4 Precautions about the DMAC This is a blank page ...
Страница 498: ...10 10 228 Ver 0 10 MULTIJUNCTION TIMERS 10 9 TOM Output related 16 bit Timer This is a blank page ...
Страница 550: ...11 11 52 Ver 0 10 A D CONVERTERS 11 4 Precautions on Using A D Converters This is a blank page ...
Страница 614: ...12 12 64 Ver 0 10 This is a blank page SERIAL I O 12 9 Precautions on Using UART Mode ...
Страница 710: ...14 14 16 Ver 0 10 REAL TIME DEBUGGER RTD 14 4 Typical Connection with the Host This is a blank page ...
Страница 746: ...16 16 20 Ver 0 10 WAIT CONTROLLER 16 3 Typical Operation of the Wait Controller This is a blank page ...
Страница 756: ...17 17 10 Ver 0 10 RAM BACKUP MODE 17 4 Exiting RAM Backup Mode Wakeup This is a blank page ...
Страница 757: ...CHAPTER 18 CHAPTER 18 OSCILLATION CIRCUIT 18 1 Oscillator Circuit 18 2 Clock Generator Circuit ...
Страница 762: ...18 18 6 Ver 0 10 OSCILLATION CIRCUIT 18 2 Clock Generator Circuit This is a blank page ...
Страница 798: ...19 19 36 Ver 0 10 JTAG 19 6 Precautions about Board Design when Connecting JTAG This is a blank page ...
Страница 830: ...21 21 24 Ver 0 10 PRELIMINARY PRELIMINARY This is a blank page ELECTRICAL CHARACTERISTICS 21 5 AC Characteristics ...
Страница 831: ...CHAPTER 22 CHAPTER 22 TYPICAL CHARACTERISTICS 22 1 A D Conversion Characteristics ...
Страница 833: ...Appendix 1 1 Dimensional Outline Drawing APPENDIX 1 APPENDIX 1 MECHANICAL SPECIFICATIONS ...
Страница 837: ...Appendix 2 1 32170 Instruction Processing Time APPENDIX 2 APPENDIX 2 INSTRUCTION PROCESSING TIME ...
Страница 841: ...Appendix 3 1 Precautions about Noise APPENDIX 3 APPENDIX 3 PRECAUTIONS ABOUT NOISE ...