Table 3-48. Rx Buffer and FIFO Element (continued)
R1
ANMF
FIDX[6:0] res
E
D
L
B
R
S
DLC[3:0] RXTS[15:0]
R2 DB3[7:0] DB2[7:0] DB1[7:0] DB0[7:0]
R3 DB7[7:0] DB6[7:0] DB5[7:0] DB4[7:0]
... ... ... ...
Rn DBm[7:0] DBm-1[7:0] DBm-2[7:0] DBm-3[7:0]
Table 3-49. Rx Buffer and FIFO Element Descriptions
R0 Bit 31 ESI: Error State Indicator
0 Transmitting node is error active
1 Transmitting node is error passive
R0 Bit 30 XTD: Extended Identifier
Signals to the Host whether the received frame has a standard or extended identifier.
0 11-bit standard identifier
1 29-bit standard identifier
R0 Bit 29 RTR: Remote Transmission Request
Signals to the Host whether the received frame is a data frame or a remote frame.
0 Received frame is a data frame
1 Received frame is a remote frame
NOTE: There are no remote frames in CAN FD format. In case a CAN FD frame was received
(EDL = 1), bit RTR reflects the state of the reserved bit r1.
R0 Bits 28:0 ID[28:0]: Identifier
Standard or extended identifier depending on bit XTD. A standard identifier is stored into ID[28:18].
R1 Bit 31 ANMF: Accepted Non-matching Frame
Acceptance of non-matching frames may be enabled via GFC[ANFS] and GFC[ANFE].
0 Received frame matching filter index FIDX
1 Received frame did not match any Rx filter element
R1 Bits 30:24 FIDX[6:0]: Filter Index
0-127 Index of matching Rx acceptance filter element (invalid if ANMF = 1). Range is 0 to
SIDFC[LSS] - 1 resp. XIDFC[LSE] - 1.
R1 Bit 21 EDL: Extended Data Length
0 Standard frame format
1 CAN FD frame format (new DLC-coding and CRC)
R1 Bit 20 BRS: Bit Rate Switch
0 Frame received without bit rate switching
1 Frame received with bit rate switching
Table continues on the next page...
Message RAM
MPC5777C Reference Manual Addendum, Rev. 1, 12/2015
80 Freescale Semiconductor, Inc.
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