Renesas RX Series

R01UH0823EJ0100 Rev.1.00 Page 1201 of 1823
Jul 31, 2019
RX23W Group 36. CAN Module (RSCAN)
36.2.7 Error Flag Register L (ERFLL)
Note 1. Only 0 can be written to this bit, to clear the flag. Writing 1 does not affect the flag value.
See the CAN standard (ISO 11898-1) if you want to check error occurrence conditions. To clear each flag of this register,
write 0 by the program. These flags cannot be set to 1 by the program. If any of these flags becomes 1 at the timing when
the program writes 0 to the flag, the flag becomes 1. Each flag becomes 0 in channel reset mode.
With respect to b14 to b8 in the ERFLL register, if an error is detected with all flags of b14 to b8 set to 0 when the
CTRH.ERRD bit is set to 0 (only the first error information is displayed), the corresponding flag becomes 1.
BEF Flag (Bus Error Flag)
This flag becomes 1 when any one of the ADERR, B0ERR, B1ERR, CERR, AERR, FERR, and SERR flags becomes 1.
Address(es): RSCAN0.ERFLL 000A 830Ch
b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
— ADERR B0ERR B1ERR CERR AERR FERR SERR ALF BLF OVLF BORF BOEF EPF EWF BEF
Value after reset:
0000000000000000
Bit Symbol Bit Name Description R/W
b0 BEF Bus Error Flag 0: No channel bus error is detected.
1: Channel bus error is detected.
R/(W)
*
1
b1 EWF Error Warning Flag 0: No error warning is detected.
1: Error warning is detected.
R/(W)
*
1
b2 EPF Error Passive Flag 0: No error passive is detected.
1: Error passive is detected.
R/(W)
*
1
b3 BOEF Bus Off Entry Flag 0: No bus off entry is detected.
1: Bus off entry is detected.
R/(W)
*
1
b4 BORF Bus Off Recovery Flag 0: No bus off recovery is detected.
1: Bus off recovery is detected.
R/(W)
*
1
b5 OVLF Overload Flag 0: No overload is detected.
1: Overload is detected.
R/(W)
*
1
b6 BLF Bus Lock Flag 0: No channel bus lock is detected.
1: Channel bus lock is detected.
R/(W)
*
1
b7 ALF Arbitration Lost Flag 0: No arbitration lost is detected.
1: Arbitration lost is detected.
R/(W)
*
1
b8 SERR Stuff Error Flag 0: No stuff error is detected.
1: Stuff error is detected.
R/(W)
*
1
b9 FERR Form Error Flag 0: No form error is detected.
1: Form error is detected.
R/(W)
*
1
b10 AERR ACK Error Flag 0: No ACK error is detected.
1: ACK error is detected.
R/(W)
*
1
b11 CERR CRC Error Flag 0: No CRC error is detected.
1: CRC error is detected.
R/(W)
*
1
b12 B1ERR Recessive Bit Error Flag 0: No recessive bit error is detected.
1: Recessive bit error is detected.
R/(W)
*
1
b13 B0ERR Dominant Bit Error Flag 0: No dominant bit error is detected.
1: Dominant bit error is detected.
R/(W)
*
1
b14 ADERR ACK Delimiter Error Flag 0: No ACK delimiter error is detected.
1: ACK delimiter error is detected.
R/(W)
*
1
b15 — Reserved This bit is read as 0. The write value should be 0. R/W