Xilinx CAN FD v2.0 Product Manual page 46

Table 2-31: TB ID Register (Cont'd)
Bits Name
18:1 ID[17:0]
0 RTR/RRS
TB*-DLC Register (Address Offset + 0x0104, 0x014C ...)
Table 2-32: TB DLC Register
Bits Name
31:28 DLC[3:0]
27 EDL/FDF
26 BRS
25 Reserved
24 EFC
CAN FD v2.0
PG223 December 5, 2018
Control/ Default
Status Value
Extended Message ID.
This field Indicates the Extended Identifier.
Control N/A
Valid only for Extended CAN and CAN FD Frames.
For Standard CAN and CAN FD Frames, writes to this field
should be 0.
Remote Transmission Request.
This bit differentiates between CAN extended data
frames and CAN extended remote frames.
• 1 = Indicates the message frame is a CAN Remote
Control N/A
• 0 = Indicates the message frame is a CAN Data Frame.
For Extended CAN FD frame this bit is transmitted at RRS
position of the frame and must be set as 0.
For Standard CAN and CAN FD Frames, writes to this bit
should be 0.
Note:
Control/ Default
Status Value
Data Length Code
Control N/A
This is the 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.
Control N/A
• 1 = CAN FD format frame.
• 0 = CAN format frame.
Bit Rate Switch
The BRS bit decides whether the bit rate is switched inside a
CAN FD format frame or not (provided BRSD bit is not set in
MSR register).
• 1 = Bit rate is switched from the standard bit rate of the
Control N/A
Arbitration phase to the preconfigured alternate bit rate
of the Data phase inside a CAN FD frame.
• 0 = Bit rate is not switched inside a CAN FD frame.
Note:
to 0.
N/A N/A Reserved. Write to this field should be 0.
Event FIFO Control.
Control N/A • 0 = Don't store TX events.
• 1 = Store TX Events.
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Chapter 2: Product Specification
Description
Frame.
There are no CAN FD remote frames.
Description
BRS does not exist in CAN format frames and should be set
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