NXP Semiconductors LPC24XX UM10237 - Manual (Page 483)

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User manual Rev. 04 — 26 August 2009 483 of 792
NXP Semiconductors
UM10237
Chapter 18: LPC24XX CAN controllers CAN1/2
20:16 ERRBIT
4:0 [3]
Error Code Capture: when the CAN controller detects
a bus error, the location of the error within the frame is
captured in this field. The value reflects an internal
state variable, and as a result is not very linear: 0 X
00011 Start of Frame
00010 ID28 ... ID21
00110 ID20 ... ID18
00100 SRTR Bit
00101 IDE bit
00111 ID17 ... 13
01111 ID12 ... ID5
01110 ID4 ... ID0
01100 RTR Bit
01101 Reserved Bit 1
01001 Reserved Bit 0
01011 Data Length Code
01010 Data Field
01000 CRC Sequence
11000 CRC Delimiter
11001 Acknowledge Slot
11011 Acknowledge Delimiter
11010 End of Frame
10010 Intermission
10001 Active Error Flag
10110 Passive Error Flag
10011 Tolerate Dominant Bits
10111 Error Delimiter
11100 Overload flag
21 ERRDIR When the CAN controller detects a bus error, the
direction of the current bit is captured in this bit. 0 X
0 Error occurred during transmitting.
1 Error occurred during receiving.
23:22 ERRC1:0 When the CAN controller detects a bus error, the type
of error is captured in this field: 0 X
00 Bit error
01 Form error
10 Stuff error
11 Other error
Table 423. Interrupt and Capture Register (CAN1ICR - address 0xE004 400C, CAN2ICR -
address 0xE004 800C) bit description
Bit Symbol Value Function Reset
Value RM
Set