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Error Capture Register
The Error Capture register captures the most recent error event with the frame reference
pointer, rx- and tx-mode and the associated error code.

Table 5-62. Error Capture Register

BIT

OFFSET

78h

FIELD

ERR2

ERR1

ERR0

FR4

FR3

FR2

FR1

FR0

TX_MOD

RX_MOD

FRB5

FRB4

FRB3

FRB2

FRB1

FRB0

RESET

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

R/W

R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W

Table 5-63. Error Capture Register Definitions

Bits

Field Name

Description

15:13 Err[2:0]

Error_code

000 = no error (default)
001 = crc_err
010 = form_err
011 = ack_err
100 = stuff_err
101 = bit_err

12:8

FR[4:0]

frame_ref_Field
This is the frame reference a incoming or outgoing CAN message.
Values are:
00000 = stopped
00001 = synchronize
00101 = interframe
00110 = bus_idle
00111 = start_of_frame
01000 = arbitration
01001 = control
01010= data
01011 = crc
01100 = ack
01101 = end_of_frame
10000 = error_flag
10001 = error_echo
10010 = error_del:
11000 = overload_flag
11001 = overload_echo
11010 = overload_del
Other codes are not used.

7 TX_MOD

TX Mode
1 = transmitting data.
0 = not in TX mode (receiving or idle).

RX_MOD

RX Mode
1 = receiving data.
0 = not in RX mode (transmitting or idle).

5:0 FRB[5:0]

frame_ref_bit_nr

A 6-bit vector that counts the bit numbers in one field.
Example: if field = “data” = “01010”, “bit_nr” = “000000”, and
“tx_mode” = ‘1’, it indicates that the first data bit is being
transmitted.