472
CHAPTER 23 CAN CONTROLLER
23.6.2
Bus Operation Stop Bit (HALT = 1)
The bus operation stop bit sets or cancels stopping of bus operation, or indicates its
status.
■
Conditions for Setting Bus Operation Stop (HALT=1)
There are three conditions for setting bus operation stop (HALT = 1):
•
After hardware reset
•
When node status changed to bus off
•
By writing "1" to HALT
Notes:
•
The bus operation should be stopped by writing "1" to HALT before the F
2
MC-16LX is changed in
low-power consumption mode (stop mode and time-base timer mode).
If transmission is in progress when "1" is written to HALT, the bus operation is stopped (HALT =
1) after transmission is terminated. If reception is in progress when "1" is written to HALT, the bus
operation is stopped immediately (HALT = 1). If received messages are being stored in the
message buffer (x), stop the bus operation (HALT = 1) after storing the messages.
•
To check whether the bus operation has stopped, always read the HALT bit.
■
Conditions for Canceling Bus Operation Stop (HALT = 0)
By writing "0" to HALT
Notes:
•
Canceling the bus operation stop after hardware reset or by writing "1" to HALT as above
conditions is performed after "0" is written to HALT and continuous 11-bit "H" levels (recessive
bits) have been input to the receive input pin (RX) (HALT = 0).
•
Canceling the bus operation stop when the node status is changed to bus off as above conditions
is performed after "0" is written to HALT and continuous 11-bit "H" levels (recessive bits) have
been input 128 times to the receive input pin (RX) (HALT = 0). Then, the values of both transmit
and receive error counters reach "0" and the node status is changed to error active.
•
When write "0" to HALT during the node status is Bus Off, ensure that "1" is written to this bit.
Содержание MB90390 Series
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Страница 17: ...xiii APPENDIX D List of Interrupt Vectors 690 INDEX 695 ...
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Страница 132: ...104 CHAPTER 5 CLOCKS ...
Страница 152: ...124 CHAPTER 6 CLOCK MODULATOR ...
Страница 210: ...182 CHAPTER 11 TIME BASE TIMER ...
Страница 218: ...190 CHAPTER 12 WATCHDOG TIMER ...
Страница 264: ...236 CHAPTER 14 16 BIT RELOAD TIMER WITH EVENT COUNT FUNCTION ...
Страница 274: ...246 CHAPTER 15 WATCH TIMER ...
Страница 306: ...278 CHAPTER 17 DTP EXTERNAL INTERRUPTS ...
Страница 338: ...310 CHAPTER 18 8 10 BIT A D CONVERTER ...
Страница 364: ...336 CHAPTER 19 UART0 UART1 ...
Страница 398: ...370 CHAPTER 20 UART2 UART3 Figure 20 5 2 ORE Set Timing Receive data RDRF ORE ...
Страница 432: ...404 CHAPTER 20 UART2 UART3 ...
Страница 482: ...454 CHAPTER 22 SERIAL I O ...
Страница 560: ...532 CHAPTER 24 STEPPING MOTOR CONTROLLER ...
Страница 582: ...554 CHAPTER 27 ROM MIRRORING MODULE ...
Страница 632: ...604 CHAPTER 29 EXAMPLES OF SERIAL PROGRAMMING CONNECTION ...
Страница 722: ...694 APPENDIX ...
Страница 723: ...695 INDEX The index follows on the next page This is listed in alphabetic order ...
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