Xilinx CAN FD v2.0 Product Manual page 48

Table 2-34: CAN FD TXE Message Space (Cont'd)
Start
Address
0x200C
:
:
0x20F8
0x20FC
Notes:
1. Read from uninitialized memory location might return X or invalid data. Asserting a soft or hard reset does not
clear block RAM locations.
2. Message Buffer element resides in TX block RAM. Host should respect read access rules to avoid memory
collisions.
TXE FIFO TB* ID Register (Address Offset + 0x2000, 0x2008 ...)
Table 2-35: TXE FIFO TB ID Register
Bits Name
31:21 ID
20 SRR/RTR/RRS
19 IDE
CAN FD v2.0
PG223 December 5, 2018
Name
TXE FIFO TB1-DLC
TXE FIFO TB31-ID
TXE FIFO TB31-DLC
Control/ Default
Status Value
Status N/A
Status N/A
Status N/A
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Access
TXE FIFO TB DLC Register
Read Only
Read Only TXE FIFO TB ID Register
Read Only TXE FIFO TB DLC Register
Description
Standard Message ID.
The Identifier portion for a Standard Frame is 11 bits.
These bits indicate the Standard Frame ID.
This field is valid for both CAN and CAN FD Standard and
Extended Frames.
Substitute Remote Transmission Request
For Extended CAN frames and Extended CAN FD frame
this bit is transmitted at SRR position of the respective
frame and must be set as 1. For Standard CAN FD frames,
this bit is transmitted at the RRS position of the frame
and must be set as 0. This bit differentiates between
standard CAN data frames and standard CAN remote
frames as the following:
• 1 = Indicates that the message frame is a Standard
Remote CAN Frame.
• 0 = Indicates that the message frame is a Standard
Data CAN Frame.
There are no CAN FD remote frames.
Note:
Identifier Extension
This bit differentiates between frames using the Standard
Identifier and those using the Extended Identifier.
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.
Chapter 2: Product Specification
Description
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