Xilinx CAN FD v2.0 Product Manual page 54

Table 2-39: RB ID Register (Cont'd)
Bits Name
19 IDE
18:1 ID[17:0]
0 RTR/RRS
RB*DLC Register (Address Offset + 0x2104, 0x214C ...0x4104, 0x414C ...)
Table 2-40: RB DLC Register
Bits Name
31:28 DLC[3:0]
27 EDL/FDF
CAN FD v2.0
PG223 December 5, 2018
Control/ Default
Status Value
Identifier Extension.
This bit differentiates between frames using the Standard
Identifier and those using the Extended Identifier.
Status N/A Valid for both CAN and CAN FD Standard and Extended
Frames.
• 1 = Indicates the use of an Extended Message Identifier.
• 0 = Indicates the use of a Standard Message Identifier.
Extended Message ID.
This field indicates the Extended Identifier.
Status N/A
Valid only for Extended CAN and CAN FD Frames.
For Standard CAN and CAN FD Frames, this field is reserved
and has no meaning.
Remote Transmission Request.
This bit differentiates between CAN extended data frames and
CAN extended remote frames.
• 1 = Indicates the received message is a CAN Remote Frame.
Status N/A
• 0 = Indicates the received message is a CAN Data Frame.
For Extended CAN FD frames this bit is received at the RRS
position of the frame and must be set as 0.
For Standard CAN and CAN FD frames, this field is reserved and
has no meaning.
Control/ Default
Status Value
Data Length Code
Status N/A
Received data length code of the control field of the CAN
and CAN FD frame.
Extended Data Length/FD Frame Format
This bit distinguishes between CAN format and CAN FD
format frames.
Status N/A
• 1 = Received frame is a CAN FD format frame.
• 0 = Received frame is a CAN format frame.
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Chapter 2: Product Specification
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