Xilinx CAN FD v2.0 Product Manual page 45

Table 2-30: CAN FD TX Message Space (Cont'd)
Start
Name
Address
0x0A08 M1/AFMR1
0x0A0C F1/AFIR1
M2,
0x0A10-
F2-M31,
0x0AFC
F31
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. Each TB is linked to a bit in TRR register. Core access TB elements inside TX block RAM only if respective TRR bit is
set. After setting TRR bit, Host should not access the TX message elements until TRR is cleared by the core to avoid
memory collision issues.
TB*-ID Register (Address Offset + 0x0100, 0x0148 ...)
Table 2-31: TB ID Register
Bits Name
31:21 ID[28:18]
20 SRR/RTR/RRS
19 IDE
CAN FD v2.0
PG223 December 5, 2018
Access
Read, Write
Read, Write
See Acceptance Filter Mask
Register
Read, Write
Control/ Default
Status Value
Standard Message ID.
The Identifier portion for a Standard Frame is 11 bits.
Control N/A
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 frame this bit is transmitted at RRS
position of the frame and must be set as 0.
Control N/A 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.
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
Control N/A
Frames.
• 1 = Indicates the use of an Extended Message
Identifier.
• 0 = Indicates the use of a Standard Message Identifier.
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Chapter 2: Product Specification
Description
ID Filter Mask pair 1
ID Filter Mask pairs 2 to 31
Description
There are no CAN FD remote frames.
Notes
45
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