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32180 Group User’s Manual (Rev.1.0)
13.2 CAN Module Related Registers
CAN MODULE
13.2.9 CAN Cause of Error Registers
CAN0 Cause of Error Register (CAN0EF)
<Address: H
’0080 1017>CAN1 Cause of Error Register (CAN1EF)
<Address: H
’0080 1417>123456b7b0
BITEETR STFE FORME CRCE ACKE
000000
<After reset: H’00>
b Bit Name Function R W
0–1 No function assigned. Fix to "0". 00
2 ETR 0: Error detected when sending R –
Transmit/receive error judgment bit 1: Error detected when receiving
3 BITE 0: Bit error not detected R –
Bit error detection bit 1: Bit error detected
4 STFE 0: Stuff error not detected R –
Stuff error detection bit 1: Stuff error detected
5 FORME 0: Form error not detected R –
Form error detection bit 1: Form error detected
6 CRCE 0: CRC error not detected R –
CRC error detection bit 1: CRC error detected
7 ACKE 0: ACK error not detected R –
ACK error detection bit 1: ACK error detected
This register indicates error information when a communication error occurred.
(1) ETR (Transmit/Receive Error Judgement) bit (Bit 2)
This bit is set to "1" if the CAN module was operating as a reception node when a communication error
occurred. The bit is cleared to "0" by a read of this register.
(2) BITE (Bit Error Detection) bit (Bit 3)
This bit is set to "1" when a bit error was detected. The bit is cleared to "0" by a read of this register.
(3) STFE (Stuff Error Detection) bit (Bit 4)
This bit is set to "1" when a stuff error was detected. The bit is cleared to "0" by a read of this register.
(4) FORME (Form Error Detection) bit (Bit 5)
This bit is set to "1" when a form error was detected. The bit is cleared to "0" by a read of this register.
(5) CRCE (CRC Error Detection) bit (Bit 6)
This bit is set to "1" when a CRC error was detected. The bit is cleared to "0" by a read of this register.
(6) ACKE (ACK Error Detection) bit (Bit 7)
This bit is set to "1" when an ACK error was detected. The bit is cleared to "0" by a read of this register.
Note: • Depending on the error status, two or more bits may be set at the same time.
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