Xilinx CAN FD v2.0 Product Manual page 59

Table 2-42: Acceptance Filter Mask Register
Bits Name Access
31:21 AMID[28:18] R/W
20 AMSRR R/W
19 AMIDE R/W
18:1 AMID[17:0] R/W
0 AMRTR R/W
AFIR* Register (Address Offset + 0x0A04, 0x0A0C,...)
The Acceptance Filter ID registers (AFIR) contain Identifier bits, which are used for
acceptance filtering. All bit fields (AIID[28:18], AISRR, AIIDE, AIID[17:0], and AIRTR) need to
be defined for Extended frames.
CAN FD v2.0
PG223 December 5, 2018
Default
Value
Standard Message ID Mask .
These bits are used for masking the Identifier in a Standard Frame.
• 1 = Indicates the corresponding bit in Acceptance Mask ID register is
0
used when comparing the incoming message identifier.
• 0 = Indicates the corresponding bit in Acceptance Mask ID register is
not used when comparing the incoming message identifier.
Substitute Remote Transmission Request Mask.
This bit is used for masking the RTR bit in a Standard Frame.
• 1 = Indicates the corresponding bit in Acceptance Mask ID register is
0
used when comparing the incoming m4essage identifier.
• 0 = Indicates the corresponding bit in Acceptance Mask ID register is
not used when comparing the incoming message identifier.
Identifier Extension Mask
Used for masking the IDE bit.
• 1 = Indicates the corresponding bit in Acceptance Mask ID register is
used when comparing the incoming message identifier.
• 0 = Indicates the corresponding bit in Acceptance Mask ID register is
not used when comparing the incoming message identifier.
0
If AMIDE = 1 and the AIIDE bit in the corresponding Acceptance ID
register is 0, this mask is applicable to only Standard frames.
If AMIDE = 1 and the AIIDE bit in the corresponding Acceptance ID
register is 1, this mask is applicable to only extended frames.
If AMIDE = 0, this mask is applicable to both Standard and Extended
frames.
Extended Message ID Mask .
These bits are used for masking the Identifier in an Extended Frame.
• 1 = Indicates the corresponding bit in Acceptance Mask ID register is
0
used when comparing the incoming message identifier.
• 0 = Indicates the corresponding bit in Acceptance Mask ID register is
not used when comparing the incoming message identifier.
Remote Transmission Request Mask .
This bit is used for masking the RTR bit in an Extended Frame.
• 1 = Indicates the corresponding bit in Acceptance Mask ID register is
0
used when comparing the incoming message identifier.
• 0 = Indicates the corresponding bit in Acceptance Mask ID register is
not used when comparing the incoming message identifier.
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Chapter 2: Product Specification
Description
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