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Chapter 16
FCAN Controller
User’s Manual U16702EE3V2UD00
Figure 16-28:
CAN Module Control Register (CnCTRL) Format (2/4)
Remarks: 1.
The TSTAT bit is set to 1 under the following conditions (timing):
- The SOF bit of a transmit frame is detected
- The first bit of an error flag is detected during a transmit frame
2.
The TSTAT bit is cleared to 0 under the following conditions (timing):
- During transition to bus-off state
- On occurrence of arbitration loss in transmit frame
- On detection of recessive level at the second bit of the interframe space
- On transition to the initialization mode at the first bit of the interframe space
Remarks: 1.
The CCERC bit is used to clear the CnERC and CnINFO registers for re-initialization or
forced recovery from the bus-off state. This bit can be set to 1 only in the initialization
mode.
2.
When the CnERC and CnINFO registers have been cleared, the CCERC bit is also
cleared to 0 automatically.
3.
The CCERC bit can be set to 1 at the same time as a request to change the initialization
mode to an operation mode is made.
4.
If the CCERC bit is set to 1 immediately after the INIT mode is entered in the self test
mode, the receive data may be corrupted.
Remark:
The AL bit is valid only in the single-shot mode.
TSTAT
Transmission status bit
0
Transmission is stopped.
1
Transmission is in progress.
CCERC
Error counter clear bit
0
The CnERC and CnINFO registers are not cleared in the initialization mode.
1
The CnERC and CnINFO registers are cleared in the initialization mode.
AL
Bit to set operation in case of arbitration loss
0
Re-transmission is not executed in case of an arbitration loss in the single-shot mode.
1
Re-transmission is executed in case of an arbitration loss in the single-shot mode.
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